Answer:
D. Mass extinction events separate the three eras from each other
Explanation:
The Phanerozoic represents an eon, and it is the most recent one. It is further divided into three eras, Paleozoic, Mesozoic, and Cenozoic. The division between the tree eras is because of mass extinction events. The Paleozoic and Mesozoic era are divided by the Permian-Triassic mass extinctions. The Mesozoic and Cenozoic are divided by the Cretaceous-Paleogene extinction. The Cenozoic era is still in existence, as there hasn't been a mass extinction of a magnitude big enough so far.
Answer:
mass extinction
Explanation:
What conditions are needed to form organic molecules from inorganic molecules?
Answer: Ammonia, methane, carbon dioxide and radiation.
Explanation: All the living material consists of organic molecules that mainly consists of the element carbon.
The organic molecules evolve over 4 billion years ago by the help of inorganic materials under certain conditions. These inorganic materials were ammonia, carbon dioxide, methane and radiation.
The early condition of earth was also created by Miller and Urey in his experiment which proved that all the organic molecules are formed from the inorganic molecules.
Organic molecules formed from inorganic molecules roughly 4 billion years ago possibly through energy input from lightning in a reducing atmosphere containing gases like ammonia and methane. Experiments like Miller-Urey's support this theory, and extraterrestrial sources like meteorites may also have contributed to the prebiotic environment.
Organic molecules, which are carbon-containing compounds, are critical for life. You asked specifically about the conditions needed to form organic molecules from inorganic molecules. The formation of these molecules about 4 billion years ago likely involved energy input, such as lightning in Earth's early atmosphere, which contained gases like ammonia, methane, water vapor, and carbon dioxide. Experiments, like the famous one conducted by Stanley Miller and Harold Urey in 1953, demonstrated that under such conditions, a mixture of gases when subjected to electrical sparks could synthesize organic molecules from inorganic precursors, generating amino acids, lipids, sugars, and some nucleotide bases.
Aside from Earth-based synthesis, extraterrestrial origins have also been proposed. It's hypothesized that meteorites, comets, and asteroids may have brought organic molecules to Earth during what is known as the period of heavy bombardment, contributing to the primordial soup necessary for the development of life.
Contrary to point, the presence of oxygen is not necessary for the development of organic molecules and was likely absent on the early Earth during the formation of these molecules. Instead, a reducing atmosphere is believed to have facilitated this process.
Cloning an individual usually produces orangisms that
(1) contain dangerous mutations
(2) contain identical genes
(3) are identical in appearance and behavior
(4) produce enzymes different from the parent
Cloning produces organisms with identical genes to the original. Appearance and behavior may vary due to environmental influences. No inherent risk for dangerous mutations or unique enzyme production exists in cloning.
Explanation:The process of cloning typically produces organisms that contain identical genes to the original individual. This is because cloning involves the replication of the complete set of genes from the parent organism. However, it's important to note that while the genes may be identical, this does not necessarily extend to appearance and behavior, as these attributes can be influenced by environmental factors. Additionally, cloning does not inherently lead to dangerous mutations or the production of different enzymes because the DNA being cloned includes all the necessary information for encoding the parental organisms' enzymes.
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Suppose the climate in a habitat changes. Over time, the amount of precipitation decreases by 20 percent. How will this most likely affect the habitat?
Answer:
Species adapted to drier environments will replace species less suited to the new climate.
Explanation:
What do family programs reduce?
Family programs aim to reduce negative outcomes, community-based programs address various issues effectively, and prenatal and early childhood visitation programs benefit low-income children.
Family programs aim to reduce various negative outcomes such as divorce, high blood pressure, smoking, and obesity.
For example, community-based programs have been successful in addressing issues like alcohol, tobacco, and drug abuse as well as violence, even though the changes brought about by these programs are typically modest.
In addition, prenatal and early childhood visitation programs have proven effective in improving the health and well-being of low-income children, saving money in the long run and helping families in need.
which of the following terms would Bb represent in an organism?
A.phenotype
B.genotype
C.genetics
Answer:
the answer is genotype
What is the function/importance of the muscular system?
☆ The function of the muscular system to respond to information from the brain, and contract accordingly.
➤ Reason✧ The nervous system is responsible for sending signals to the body to control it. Your nervous system can send electrical pulses to your muscles, which they respond accordingly, moving in what ever way your nervous system told it to. Your nervous system is controlled by your brain, and this is why you can control these movements. Say for example, when you move, your fingers, you are actually just sending electrical signals to your hands which cause your muscles to contract, making your finger move in a certain direction. The muscles are connected to your bones, which are connected to joints, allowing the bones to move in different directs when your muscles contract.
✧ Your brain is powerful.╚═⋄═◇═◈═❖═✧═☆═✧═❖═◈═◇═⋄═╝Final answer:
The muscular system includes all the body's muscles and is crucial for movement, bodily support, protection of internal organs, and heat generation. It allows for both voluntary and involuntary actions, from running to the heartbeat.
Explanation:
The Function and Importance of the Muscular System
The muscular system is essential for human life, encompassing all the muscles in our body. The primary function of this system is to facilitate movement, which includes not just voluntary actions like walking or jumping, but also involuntary ones such as the pumping of the heart or the movements involved in digestion. The muscles within this system work by contracting and relaxing, which in turn pulls on the bones of the skeletal system to produce motion.
This collaboration between muscles and bones supports the body's structure, protects internal organs, and allows for a diverse range of movements. For example, it enables standing, walking, running, grasping objects, and even facial expressions. Additionally, the muscular system has a role in maintaining posture and generating heat during muscle activity, which is vital for regulating body temperature.
An interesting aspect of the muscular system is its use in voluntary actions, such as those performed when practicing yoga. This illustrates how we can control our muscles to execute precise and controlled movements, highlighting the versatility and control we can achieve with our muscular system.
The _______ functional group can always be found in a carbohydrate molecule.
a. phosphate
b. hydroxyl
c. amino
d. water
Explanation:
The hydroxyl functional group can always be found in a carbohydrate molecule.
Answer is hydroxyl - b
Hello There!
YOUR ANSWER IS "B"
The hydroxyl functional group can always be found in a carbohydrate molecule.
Most carbon compounds are considered to be what type of molecules?
A.macromolecules
B.micromolecules
C.water-soluble molecules
Answer:
A
Explanation:
Most carbon compounds are considered to be macromolecules. This is because these compounds are synthesized with the help of many important molecules like proteins, sugars, nucleic acids, etc.
How carbon atoms are held in carbon compounds?A carbon atom can bond with four other atoms by covalent bonds. This bonding ability provides a structural as well as a functional role to carbon compounds.
Macromolecules may be defined as a molecule that is composed of a large number of atoms that are held together by each other via specific interactions.
Therefore, the correct option for this question is A.
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The function of the larger, more typical pinecone is: It's not multiple choice.
to produce pollen
to produce sperm
to produce eggs
to fertilize seeds
Answer:
Large pinecones produce pollen to fertilize seeds in a way
Explanation:
A runner is running the 60-meter dash, which is an oxygen-deficient race. What type of energy is the runner's body using to power through the race?
A. Anabolic
B. Catabolic
C. Aerobic
D. Anaerobic
Option D. Anaerobic
A runner is running the 60-meter dash, A runner is running the 60-meter dash, Anaerobic type of energy is the runner's body using to power through the race.
What are anaerobic and aerobic?Aerobic means 'with air' and refers to the body producing energy with the use of oxygen. This typically involves any exercise that lasts longer than two minutes in duration. Continuous 'steady state' exercise is performed aerobically. Anaerobic means 'without air' and refers to the body producing energy without oxygen.
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what are male reproductive cells in a plant called?
A.egg
B.pollen
C.stem
D.sperm
Answer:
I suppose it would BE B
Explanation:
Answer:The answer is B or pollen.
Pollen is considered to be the male reproductive cell. Sorry if it's wrong.
If an environment will support either aerobic or anaerobic respiration, why will microbes default to aerobic respiration?
A.
because it requires free oxygen
B.
because it produces much more energy
C.
because it involves the breakdown of glucose
D.
because it can be done in any environmental conditions
Answer:B
Explanation:
Because aerobic respiration produce alot of energy (looking at kreb's cycle, ETP,)
Finches living on the Galapagos Islands were critical for Darwin to develop his ideas. What key observation did he make about the finches?
A. The finches' feathers were structurally different to allow them to fly at different heights and speeds, depending on their local environment.
B. The finches' beaks were uniquely adapted as tools for them to eat the food that was available to them.
C. The finches' feathers were colored differently, providing camouflage within their unique environment.
D. The finches' beaks were colored differently, providing camouflage within their unique environment
Which strand is synthesized towards the replication fork
Answer: 5′ → 3′ direction
Explanation:
At a replication fork, both strands are synthesized in a 5′ → 3′ direction. The leading strand is synthesized continuously, whereas the lagging strand is synthesized in short pieces termed Okazaki fragments.
(pick two) if i explore two oceanic plates at a divergent boundary i will observe:
Earthquakes
faults
ocean formation
mountains
island chains
seafloor spreading
your answer is:
ocean formation
island chains
seafloor spreading
(i know i picked three but i think these are the right answers)
Answer:
ocean formation, island chains, and seafloor spreading.
Explanation:
* Will mark brainliest for first correct answer*
Which of the following is MOST likely to affect the biodiversity of a park ecosystem?
A. Less rain than usual for several months
B. Ongoing pollution from a nearby factory
C. Park rangers plant a new type of tree
D. Disease wipes out an entire population
Answer:
C. Park rangers plant a new type of tree.
Explanation:
Biodiversity is a term used to describe the "variety" of plants and animals within the given ecosystem. To offset the current biodiversity, a species must be introduced or taken away. In this case, a "new type of tree" is introduced into the ecosystem, which would affect the ecosystem based on the land availability to native species, as well as what kind of things (diseases, etc) it brings to the ecosystem. If the species take over, animals must adapt to be able to live with the new plant.
~
which of the following is a simple form of carbohydrate?
A.glycogen
B.starch
C.glucose
D.carbon
Answer:
C
Explanation:
Simple carbohydrates contain just one or two sugars, such as fructose (found in fruits) and galactose (found in milk products). These single sugars are called monosaccharides.
Baby olivia is 2 months old and sleeps 20 hours per day. about _____ in 20 infants sleep more than 19 hours each day.
Answer:
Out of 7 ,10 ,5 and 1 answer is 1
Explanation:
20+ PTS!! NEED HELP ASAP PLEASE!!!
Which major processes were needed for the origin of life on earth?
A. Abundance of oxygen and the ozone layer
B. Active volcanoes and very cold temperatures
C. Low levels of ultraviolet radiation and specific mixture of gases
D. Organic molecules produced from spontaneous synthesis or from meteorites
Answer:
The answer is D. Organic molecules produced from spontaneous synthesis or from meteorites
Explanation:
A long time ago many meteorites would hit the Earth and these space rocks had many different Organic molecules which then later started life. Although many of the options helped this process they were not necessary which is what the quiz is asking you.
Hope This Helps!
Can I have Brainliest?
Organic molecules are produced from spontaneous synthesis or from meteorites.
What is the first major event on how life originated on Earth?The earliest life forms we know of were microscopic organisms (microbes) that left signals of their presence in rocks about 3.7 billion years old. The signals consisted of a type of carbon molecule that is produced by living things.
What are the possible scientific explanations of the origin of life on Earth?Many scientists favor the RNA world hypothesis, in which RNA, not DNA, was the first genetic molecule of life on Earth. Other ideas include the pre-RNA world hypothesis and the metabolism-first hypothesis.
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What is the amount of heat required to raise the temperature of water referred to as? A. Heat of vaporization B. Specific heat C. Heat of combustion
Answer:
B )specific heat is your answer.
plz help......................
From the figure;
The top part of the mountain is at an elevation of 264 units.
and from the hint the hikers are all at the same elevation; which again from the figure is given as 180 units.
So the difference in elevation for the hikers is: 264-180=84 units.
Hence; the answer is Option: A 84
Hope it helps...
Regards;
Leukonov/Olegion.
which if the items below would describe the genotype of an individual?
A.green eyes
B.hair color
C.GG
D.G1
C.GG describe the genotype of an individual.
What is an example genotype?An organism's genotype is a particular combination of alleles of a particular gene. For example, in the pea plant above, the possible genotypes of the flower color genes were red-red, red-white, and white-white. A phenotype is a physical symptom of a combination of alleles (genotype) in an organism.
In a broad sense, the term "genotype" refers to the genetic makeup of an organism. In other words, it describes the complete set of genes in an organism. In a narrower sense, the term can be used to refer to alleles or variants of genes carried by an organism.
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The intercellular material that holds plant cells together 1 cell cement 2. A septum which forms to separate the two new plant cells r-RNA 3. Material which makes up the structure of the cell wall centrioles 4. play a role in the formation of the spindle during cell division 2 cell plate 5. Serves to trap the sun's energy for photosynthesis cleavage furrow 6. A packet of chlorophyll arranged in stacks within a plant cell 16 secretion 7. The pinching in of the animal cell during cell division gametes 8. The new cells resulting from the division of the mother cell endoplasmic reticulum 9. channels for transporting molecules within the cell spindle 10. The reproductive cells in sexual reproduction chloroplast 11. Involved in producing and packaging secretions Golgi bodies 12. The process involving the division of the nucleus in a reproductive cell chlorophyll 13. The process involving the division of the nucleus of a body cell 3 cellulose 14. The cell that is about to undergo binary fission mother cell 15. Makes up the structure of the ribosomes meiosis 16. Substances produced by the Golgi bodies mitosis 17. The fibers which direct the even distribution of chromosomes daughter cell
Answer:
1. The intercellular material that holds plant cells together (Cell Cement)
2. A septum which forms to separate the two new plant cells (Cell plate)
3. Material which makes up the structure of the cell wall (Cellulose)
4. play a role in the formation of the spindle during cell division (Centrioles)
5. Serves to trap the sun's energy for photosynthesis (Chlorophyll)
6. A packet of chlorophyll arranged in stacks within a plant cell (Chloroplast)
7. The pinching in of the animal cell during cell division (Cleavage furrow)
8. The new cells resulting from the division of the mother cell (Daughter cells)
9. channels for transporting molecules within the cell (Endoplasmic reticulum)
10. The reproductive cells in sexual reproduction (Gametes)
11. Involved in producing and packaging secretions (Golgi Bodies)
12. The process involving the division of the nucleus in a reproductive cell (Meiosis)
13. The process involving the division of the nucleus of a body cell (Mitosis)
14. The cell that is about to undergo binary fission (Mother cell)
15. Makes up the structure of the ribosomes (rRNA)
16. Substances produced by the Golgi bodies (Secretions)
17. The fibers which direct the even distribution of chromosomes (Spindle)
Explanation:
Plant cells: (1,3,5,6)
Plant cells differ from animal cells in several ways.
Cell wall: One of the most defining one is plant cells have cell walls. These cell walls are rigid and they cover the plasma membrane of the plant cell. Cell walls have 3 layers and the outermost one is called the middle lamella, which is the cell cement. It acts like a cement because it is what holds one plant cell and the adjacent cells together. The middle lamella is made up of pectin.
The cell wall also has layers made up of cellulose, which happens to be a macromolecule as is the most abundant of its kind on Earth. They form bundles called microfibrils.
Chlorophyll: Chlorophyll are molecules found in plant cells that play a role in food production in plants. Chlorophyll absorbs sunlight which is used in the process of food making called photosynthesis, along with other elements like water and carbon dioxide. Also chlorophyll gives the green pigmentation of plants.
Chloroplast: Chlorophyll are encased in an organelle called chloroplast. Chloroplasts are where photosynthesis takes place. They are found in the leaves of plants. Because they use chlorophyll, the are also green.
Other parts of a cell: (4, 9,11.15, 16, 17)
Both plant and animal cells also have similar organelles.
Endoplasmic Reticulum (ER): There are two types: smooth endoplasmic reticulum(SER); and rough endoplasmic reticulum(RER). The SER acts like a storage unit for lipids and steroids. They also help in the production as well. RER is a pckaging and synthesis area. It is rough because they have ribosomes on them.
Ribosomes: Ribosomes are small organelles in the cell that are partly made up of rRNA or ribosomal RNA. They play an important role in protein synthesis. They help translate the DNA code that the mRNA transcribed to determine what type of protein will be formed.
Golgi Apparatus: Also known as the golgi complex, is an organelle in the cell that serves as a sorting and packaging area. It collects simple molecules and packages them into more complex molecules which would be stored if the cell would need it, or it will be sent out of the cell. These complex molecules are packed into vesicles. A transition vesicle is made from the protein in the ER is transported to the golgi apparatus, which then processes its contents. It then releases a secretory vesicle, that is then brought to the cell membrane.
Centrioles: Centrioles are small, cylinder-shaped organelles that aid in cell division. They are made up of the protein, tubulin. These centrioles produce spindles or spindle fibers that pull on the chromosomes during cell division and split them up.
(CONTINUED IN THE ATTACHMENT)
Answer:
1. Cell cement-The intercellular material that holds plant cells together
2. Cell plate-A septum which forms to separate the two new plant cells
3. Cellulose-Material which makes up the structure of the cell wall
4. Centrioles-play a role in the formation of the spindle during cell division
5. chlorophyll-Serves to trap the sun's energy for photosynthesis
6. Chloroplast-A packet of chlorophyll arranged in stacks within a plant cell
7. Cleavage Furrow-The pinching in of the animal cell during cell division
8. Daughter Cells- The new cells resulting from the division of the mother cell
9. Endoplasmic reticulum-channels for transporting molecules within the cell
10. Gametes-The reproductive cells in sexual reproduction
11. Golgi bodies-Involved in producing and packaging secretions
12. Meisos-The process involving the division of the nucleus in a reproductive cell
13. Mitosis-The process involving the division of the nucleus of a body cell )
14. Mother cell-The cell that is about to undergo binary fission
15. RNA-Makes up the structure of the ribosomes
16. Mother cell-Substances produced by the Golgi bodies
17. Spindle-The fibers which direct the even distribution of chromosomes
Explanation:
A 3 year-old is brought to the burn unit after pulling a pot of hot soup off the stove and spilling it on herself. she sustained 18% second degree burns on her legs and 20% third degree burns on her chest and arms. total body surface area burned is 38%. what icd-10-cm codes are reported for the burns (do not include external cause codes for the accident)?
Answer:
T21.31XA, T22.399A, T24.299A, T31.32
Explanation:
The guideline I.C.19.d.1 of ICD-10-CM code says that the when there are more than one burn in body, the burn of highest degree must be kept at first position in any sequence.
Here the burning on chest and arm is of third degree , thus it must be at first position and signified by subcategory T21.31. Also there are burns on arms and legs , therefore these must be quoted as
Burn on upper limb/multiple sites - T22.399
Burn on upper limb/multiple sites - T24.299
The code of percentage degree of burn is T31.32 which signifies 30-39 % body surface burn and 20-29 percent third degree burns
Also A denote the initial encounter and X signifies a place holder.
Thus the correct code will be
T21.31XA, T22.399A, T24.299A, T31.32
A zygote becomes a mature adult through the process of: meiosis or mitosis
Answer:
Mitosis
Explanation:
Carbon dioxide is excreted from the body by the
a. kidneys
b. skin
c.lungs
d.liver
Carbon dioxide releases from the body by the lungs.
Option: C
Explanation:
Lungs are the respiratory organs of the body. They help in the gaseous exchange of "carbon dioxide" to the atmospheric oxygen. The carbon dioxide released from the tissue as an end product of the "citric acid cycle" and dissolves in the blood in the form of bicarbonate Ion or simply bind with hemoglobin molecule of the RBC. During circulation when the blood is pumped into the lungs then the carbon dioxide is released from the lungs and oxygen is inhaled.
Two atoms are different isotopes of the same element. Therefore, these two atoms have differing numbers of___.
A. Protons
B.Neutrons
C. Charges
D. Electrons
Answer:Neutrons
Explanation:
look at the picture
When oxygen is released as a result of photosynthesis?
Oxygen is released in photosynthesis during the light-dependent reactions. In this phase, light energy absorbed by chlorophyll is used to split water molecules into hydrogen ions, electrons, and oxygen. The oxygen atoms are then combined into O2 and released into the atmosphere.
Explanation:Photosynthesis is a process that occurs in plants, algae, and some bacteria. These organisms convert light energy, usually from the sun, into chemical energy in the form of glucose (or sugar). In the process of photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) and convert it into glucose and oxygen. The oxygen is then released into the atmosphere.
The main process where oxygen is released during photosynthesis happens during the light-dependent reactions. These reactions take place within the chloroplasts (especially within the thylakoid membranes) in the plant cells. Here, light energy absorbed by chlorophyll and other photosynthetic pigments is used to 'split' water molecules into hydrogen ions, electrons, and oxygen. This process is known as photolysis of water. The released oxygen atoms from the water molecules are then combined into O2, which is the molecular form of oxygen that is released into the atmosphere.
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A group of plant cells was exposed to radiation, which damaged the chloroplasts and caused them to lose function. If the mitochondria were unharmed, what would happen to the overall function of the plant cells? A. The cells would not be able to break down waste, but would be able to replicate DNA. B. The cells would not be able to make food, but would be able to release energy from biomolecules. C. The cells would not be able to replicate DNA, but would be able to break down waste. D. The cells would not be able to release energy from biomolecules, but would be able to make food.
Answer:
A. The cells would not be able to break down waste, but would be able to replicate DNA.
Explanation:
I got this question right on plato.
will give BRAINLIEST
How do gases increase the overall greenhouse effect? A. Trapping energy from the sun in the earth's atmosphere B. Increasing the overall width of the ozone C. Increasing the size of the stratosphere and decreasing the size of the mesosphere
Answer:
A. Trapping energy from the sun in the earth's atmosphere
Explanation:
The gases in the atmosphere have detrimental role in the global climate. The greenhouse gases, such as the carbon dioxide and methane have the ability to trap heat into the atmosphere. the heat that is trapped is the one that is bounced back from the earth's surface and back into the space, but these gases manage to retain big portion of it. As more and more heat is trapped, the atmosphere gradually becomes warmer, resulting in global climate changes, and overall a warmer earth, thus having the effect of the greenhouse on the planet.
Trapping energy from the sun in the earth's atmosphere is the major cause of increasing in the overall greenhouse effect, hence option A is correct.
Similar to a greenhouse's glass roof, gases in the atmosphere like carbon dioxide trap heat. These gases that absorb heat are referred to as greenhouse gases. Sunlight penetrates the atmosphere during the day. Sunlight causes the Earth's surface to warm up.
As we produce more carbon dioxide, the atmosphere heats, which leads to the production of more water vapor, which traps heat and raises the temperature of the atmosphere.
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