Answer: Paleozoic
Explanation:
Not as many rocks existed from the precambrian era
Which types of embryos have pharyngeal slits? A. fish, amphibians, reptiles, and birds B. fish and amphibians C. all chordates D. fish, amphibians, and reptiles
I think A but I’m not positive
Embryos represent one of the developmental stages of an organism. Pharyngeal slits are the characteristic feature of all the chordates. Thus, option C is correct.
What are pharyngeal slits?Pharyngeal slits are the organs that act as reparatory organs and filter feeders, they are seen along the caudal region of the pharynx. It allows the water to move in and out. These are the feature of the chordates and have evolved in different species over time.
Therefore, pharyngeal slits are seen in the embryos of all the chordates.
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What is one characteristic that desert plants develop so they could survive in a dry environment? how does this characteristic help the plant?
Desert plants such as cactuses develop the characteristic of retaining water. This characteristic helps the plant survive and have water to drink in a dry climate where rain is not common.
In the respiration-photosynthesis cycle shown above, what are the reactants of photosynthesis that belong in Box 2?
Answer: Glucose And Oxygen
Explanation:
Answer:carbon dioxide and water
Explanation:
why is limestone and marble good for building
Limestone and Marble are used because they are an abundant, low-cost commodity in crushed stone prepared for construction projects.
Hope this helps:)
If an adult dog has 78 chromosomes, the number of chromosomes in a dog’s sperm cell will be
Answer:
39
Explanation:
Well with humans, each parent has half of the chromosomes that the baby will have, the sperm has half and the egg has the other set. So, I assume that if the puppy doesn't end up with any extra or less chromosome, it will get half of them from the sperm.
Answer:
39
I hope this helps
What’s the difference between immigration and emagration
Answer:
immigration is pretty much animals or people moving into a new place like people going to new country and emigration is the opposite its people leaving the country
What cellular organelle is responsible for modifying, sorting, and packaging proteins and lipids?
the Golgi apparatus
Answer: Golgi Apparatus
Explanation:
The Golgi apparatus is a cell organelle which is found inside the cell. This organelle is present in the cells of plant and animal.
This organelles helps in the modification of the protein that is formed in the cell. It also helps in the sorting and packaging of the proteins and lipids inside the cell.
These sorted and packaged proteins and lipids are transported to the place where it has to.
why do offspring produced through sexual reproduction show traits of each parent?
it depends on the sperm because the sperm goes through and it either takes the female sperm or the Male sperm to activate faster. The sperm from which parent basically gives the offspring their traits. I hoped this helped
Sexually reproducing organisms have two sets of genes for every trait. Offspring inherit one allele for each trait from each parent, thereby ensuring that offspring have a combination of the parents' genes.
What are the characteristics of genes?A gene is the basic physical and functional unit of heredity. Genes are made up of DNA. Some genes act as instructions to make molecules called proteins. However, many genes do not code for proteins.
Type I genes tend to be involved in immune response or sensory receptors while type III genes are involved in cell to cell signalling and type II genes are a complex mix of all three types.
Your genome is inherited from your parents, half from your mother and half from your father. The gametes are formed during a process called meiosis.
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Please answer this question!!!
the answer your looking for :
A. genus and species
hope this helps!!
In the winter, larger land masses such as Asia develop a seasonal _____.
A. System of trade winds
B.low-pressure system
C.cyclonic circulation
D.high-pressure system
In the winter, larger land masses such as Asia develop a seasonal high-pressure system.
So the correct answer is D.
Hope this helps,
Davinia.
Final answer:
In winter, larger landmasses like Asia develop a high-pressure system due to the land cooling faster than the oceans, resulting in the blowing of cold, dry air from land to sea.
Explanation:
In the winter, larger land masses such as Asia develop a seasonal high-pressure system. This occurs because the land cools down more rapidly than the oceans, creating higher pressure over the continents. This high-pressure system results in cold, dry air blowing from land to sea, contrasting with the summer months when the land is warmer than the ocean, leading to a low-pressure system over the land and winds blowing from the ocean towards the land.
The global circulation patterns play a crucial role in determining climate and seasonal variations. In winter, the presence of a high-pressure zone over land such as Siberia forces cold air to blow outwards, while in the summer, the warm air rising from the heated landmasses creates low pressures, drawing in moist oceanic air that can lead to monsoon rains.
Therefore, the correct answer to the student's question is D. high-pressure system.
Explain the difference between speed, velocity and acceleration. Give an example of each.
speed is the rate that something is able to move or operate, velocity is the speed of something in a given direction, and acceleration is somethings capacity to gain speed within a short time.
examples.
speed: 45 mph or cleaning a room in 10 mins
velocity: 75 mph
acceleration: dropping a ball, speeding up, slowing down, turning
Speed measures the rate of distance traveled, velocity includes direction, and acceleration is the rate of change of velocity. Average speed is based on total distance while the magnitude of average velocity is based on total displacement.
Understanding the difference between speed, velocity, and acceleration is crucial in physics.
Speed
Speed is a scalar quantity that measures how fast an object is moving. It is the distance traveled per unit of time and does not include direction. For example, if a car travels 60 kilometers in 2 hours, its speed is 30 kilometers per hour (km/h).Velocity
Velocity is a vector quantity that specifies both the speed of an object and the direction of its motion. For example, if a car travels 30 km/h north, its velocity is 30 km/h north. The difference between speed and velocity is that velocity includes direction, whereas speed does not.Acceleration
Acceleration is the rate of change of velocity. It can be due to a change in the object's speed, direction, or both. For example, if a car speeds up from 30 km/h to 60 km/h in 10 seconds, its acceleration is (60 - 30) / 10 = 3 km/h per second.Average Speed vs. Magnitude of Average Velocity
There is a distinction between average speed and the magnitude of average velocity. Average speed is the total distance traveled divided by the total time taken. On the other hand, the magnitude of average velocity is the total displacement (change in position) divided by the total time taken.For instance, if you travel 100 km to city A and back to the starting point in 4 hours, your total distance is 200 km, making your average speed 50 km/h.However, your displacement is zero because you end up where you started, so the magnitude of your average velocity is 0 km/h.
What formula is used to calculate acceleration
Acceleration = change in velocity/time
Hope this helps:)
Answer:
[tex]\large \boxed{{\displaystyle A=\frac{V_f-V_i}{t}}}[/tex]
Explanation:
[tex]\displaystyle acceleration = \frac{change \ in \ velocity }{elapsed \ time}[/tex]
[tex]\displaystyle A=\frac{V_f-V_i}{t}[/tex]
Which illness can be contracted by drinking contaminated water?
A: botulism
B: E. coli infection
C: salmonellae
D: gastroenteritis
The answer is D . Would you like me to explain ?
D. Gastroenteritis...........
Lakes and oceans are able to stabilize air and land temperatures because
Answer:
water is able to absorb large amounts of heat without significantly changing its temperature
Explanation:
Just had it on study island :)
what is an atom and how does it work :) pls help
An atom is the smallest unit of matter that retains properties of an element. It consists of a nucleus of protons and neutrons, surrounded by electrons. Atoms are fundamental to all matter and can convert matter into energy.
An atom is the smallest unit of ordinary matter that retains the properties of a chemical element. Here's how an atom works:
Structure: An atom consists of a central nucleus surrounded by a cloud of negatively charged electrons.Nucleus Composition: The nucleus is composed of positively charged protons and electrically neutral neutrons.Electrons: Electrons orbit the nucleus in various energy levels and are attracted to the nucleus by the electromagnetic force.Subatomic Particles: Atoms are made up of protons, neutrons, and electrons. Protons have a positive charge, neutrons have no charge, and electrons have a negative charge.Energy Conversion: Matter can be converted into energy, as described by Einstein's equation, E=mc², which shows that a small amount of mass can be converted into a large amount of energy.Atoms are incredibly small, with typical sizes around 100 picometers. Despite their size, they are the fundamental building blocks of matter, making up all solids, liquids, gases, and plasma in the universe.
Name a product in your home that affects the ocean. What is its impact, and how can you change it?
Plastic has a major effect on the ocean's environment. fish and other ocean creatures can get stuck in the plastics and kill them. It as well takes a long time to decompose, creating an even larger risk of ocean creatures getting stuck or even mistaking the plastic for food and choking. You can change this by switching to recyclable material like paper bags.
Hope this helps!
What affects do islands have on animal size
There's two effects that the islands have on the size of the animals, reducing of size, or increasing of size. The reducing of size is known as island dwarfism, while the increase in size is known island gigantism.
The effect of the island environment effects different types of animals in different manner, and it also has to be taken in account the size of the island. In general, the small animals tend to increase their size on the islands, while the large animals tend to decrease in size. The reason for this is that the smaller animals, because of the isolation, usually lack predators or they are very few, but also have sufficient amounts of food, thus they grow in size. The larger animals though, decrease their size because there isn't enough food on the islands to support them, thus with the decrease in size they consume less. Also, since they usually lack predators, they do not have to be large in order to defend themselves.
Fill in the tablet below with 3 facts about prokaryotes, eukaryotes and viruses
Prokaryotes lack a true nucleus, are smaller, and lack membrane-bound organelles. Eukaryotes have a true nucleus, larger size, and membrane-bound organelles. Viruses lack cellular structure and organelles.
Here's a table with three facts about prokaryotes, eukaryotes, and viruses:
Which molecules are reactants in cellular respiration? Cellular respiration uses oxygen as a reactant and photosynthesis does not.
Answer
Hi,
The reactants in cellular respiration are oxygen and glucose
Explanation
The process of cellular respiration takes place in the mitochondria. The reactants are oxygen and glucose and the main product is ATP energy. The waste products of cellular respiration are carbon dioxide and water. In photosynthesis, the reactants are light energy, water, carbon dioxide and chlorophyll to produce oxygen, water and glucose.
Best wishes!
Final answer:
In cellular respiration, oxygen and glucose are reactants that combine to produce ATP, with carbon dioxide and water being byproducts. This process primarily takes place in the mitochondria and is vital to energy production in cells.
Explanation:
Reactants in Cellular Respiration:
In the biological process of cellular respiration, oxygen and glucose are the primary reactants. Oxygen is essential for the breakdown of glucose; a molecule that cells derive from food which provides the necessary chemical energy. This process is critical for producing ATP (adenosine triphosphate), the energy currency of the cell, and occurs primarily within the mitochondria.
The overall chemical reaction for cellular respiration uses one molecule of glucose (C₆H₁₂O₆) and six molecules of oxygen (O₂) to produce energy. This reaction yields six molecules of carbon dioxide (CO₂) and six molecules of water (H₂O) as waste products. It reflects the inverse of photosynthesis, which utilizes carbon dioxide and water to produce glucose and oxygen.
It's noteworthy that every molecule involved in these processes is conserved and recycled in nature, maintaining a balanced and continuous cycle of matter and energy among organisms.
These organisms have similar features that are considered what kind of structure
it is backbones because we all have backbones if i am not mistaken
All living organisms on Earth are similar because they:
A. Share the same sequence of nucleotide basis.
B. Are assembled from a code found in nucleic acids.
C. Are organized by a code based on unsaturated fatty acids.
D. Contain the same number of lipids.
I Believe The Answer Would Be B.
All living organisms are fundamentally similar because they are assembled from a code found in nucleic acids, primarily DNA and RNA. This code forms genes which guide the assembly of proteins, the building blocks of living organisms.
Explanation:All living organisms on Earth share a fundamental similarity because they are assembled from a code found in nucleic acids. This code is primarily found in the form of DNA (Deoxyribonucleic Acid) and RNA (Ribonucleic Acid) in organisms. The nucleotide bases - Adenine, Thymine, Cytosine, and Guanine in DNA and Adenine, Uracil, Cytosine, and Guanine in RNA - combine in various sequences to form genes which direct the assembly of proteins. Proteins in turn contribute to the make-up of the cells, tissues, and organs of a creature. Though the exact sequence of these bases varies between organisms, their presence in all known life forms shows how organisms are assembled from a code found in nucleic acids.
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Brendan made a chart to categorize the characteristics of animals. which phrase should be written in the column titled “sometimes”?
A. are multicellular
B. have membrane-bound organelles
C. produce their own food
D. display an asymmetrical body plan
Answer:
D. display an asymmetrical body plan
Explanation:
Most of the animals have bilateral symmetry but sometimes animals show asymmetrical body plan.
Rest of the options are wrong.
Animals are always multicellular and there is no exception to this fact. So, if we will write sometimes animals are multicellular, it will be a wrong statement.
Animals are eukaryotic organisms so it means that they must have membrane-bound organelles .The organisms which do not have membrane-bound organelles are known as prokaryotes but animals are eukaryotes. So B statement is wrong.
All the animals are heterotrophs that means that animals cannot produce their own food in any situation so statement C is also wrong.
Answer:
Display an asymmetrical body plan
Explanation:
issues related to blood donation
In addition to being very confused, our bodies work systematically. When there is a lack of blood, it begins to produce new blood. As you give blood, the blood cells are renewed and you get younger. Bone marrow prevents oiling. The risk of heart attack is reduced by 90%. The rate of fat in the blood drops, your headache, stressful mood, your blood pressure goes. Your cholesterol and sugar levels remain in balance. Each time you give blood, a screening test is performed. Thus, HIV, Hepatitis B, Hepatitis C and syphilis scan will be passed. And of course, the happiness you have gained by giving life to the people you do not know hiç
Unless alcohol is taken twelve hours before giving blood; fifty kilograms and over, between the ages of 18 and 65, anyone with a normal hemoglobin measurement can donate blood. Men can donate blood four times a year in ninety days, women can donate blood once in a hundred and twenty days. drug addicts, heart attackers, infectious diseases, very low and high pulse, blood coagulants, excessive alcohol consumption of organ and tissue transplantation, those with flu, blood-expressing drug users, those with body temperature above 37.5 can not donate blood. Blood don't stand up immediately after the process, ten minutes to rest, do not carry heavy with your arm, blood juice and water for the first four hours to consume plenty of sports activities to exhaust the body and things like not to enter the sauna.
Thanks..
What was the predator of the stickleback in loburg lake?
A. Frogs (tadpoles)
B. Dragon flies (larva)
C. Humans
D. Moose
The correct answer is - C. Humans.
The stickleback in Loburg Lake, Alaska, is not a native species of the lake. It is thought that this fish was introduced to this lake somewhere between 1984 and 1989. The reason for this kind of suggestion is that the stickleback in this lake had full armor like the stickleback in the seas, which is not something found among the lake populations of this species. Also, the full armor had gradually been reducing with each new generation, and in the present, the stickleback in this lake looks totally the same as the other lake populations.
The stickleback did not had any predators in Loburg Lake, thus the losing of the full armor as it was not needed, instead the stickleback was the predator. But even though it didn't had a predator in the water, the humans became its predator through the recreational fishing that takes place on this lake.
Answer:
The answer is B
Explanation:
start watching at three minutes
Making of the Fittest: Evolution of the Stickleback Fish — HHMI BioInteractive Video (on You tube)
explain how local geography can influence the local pattern of precipitation
If there is a high undulation such as a mountain in the local region there will be high precipitation on the windward side of the mountain and low precipitation on the leeward. This is because a mountain forces the winds towards the cooler upper atmosphere. The moisture in the wind condenses and precipitates. As the winds descend into the leewards side most of the moisture has been drained out.
can someone answer this riddle worth alot and who ever can get this will get brainlist okay so if there where 10 fish and 5 drown how much is left.....
10 as the dead fish r still in the tank
The fish can't drown so, 10 fish is still left.
All wild birds of the same species sing the same song. How do the birds learn their species song?
Sparrow songs have genetically hard-wired elements, but the more complex patterns are learned through exposure to adult birds. This learning is critical for the development of their song repertoire and demonstrates a complex interplay between genetics and environmental influence.
Explanation:All wild birds of the same species do not necessarily sing the same song as songs can vary, and many bird species learn their songs. In birds capable of vocal learning such as certain sparrows, songs are acquired through a two-phase learning process. Initially, young birds learn the basics of their song from their parents, particularly from the male parent. However, this song is further developed and elaborated through exposure to conspecifics after leaving the nest.
In species like sparrows, there are both innate and learned elements to their songs. A sparrow's song includes elements that are genetically hard-wired, and it will develop a simple version of this if isolated from its environment. Conversely, a more complex and elaborate song can be learned from adult conspecifics, often involving a process of cultural transmission. The young bird has a critical window, typically around 50 days, to learn these intricate songs, or it will miss the opportunity to do so.
Cultural transmission plays a crucial role in learning the songs, as fledglings will attempt to replicate the detailed song patterns of their local community, leading to variations and 'micro-dialects' within the same species. The learning of bird song in sparrows demonstrates a combination of genetic encoding and environmental learning, which is a significant aspect of their behavioral development.
What stage of mitosis is shown?
Telophase
The chromosomes are at different poles. The nuclear evelope is around each set of chromosomes. The spindle fibers push poles apart.
What kind of a Erosion involves dissolved particles
The kind of erosion that involves dissolved particles is a) chemical erosion. Chemical erosion involves the dissolution of minerals by water. Other types like sheet, wind, and gravity erosion do not involve dissolved particles.
The kind of erosion that involves dissolved particles is A. Chemical erosion. In this type, water interacts with minerals to dissolve them, leading to chemical weathering and erosion.
Chemical Erosion: Involves the dissolution of minerals and rocks by water, leading to the transport of dissolved particles. For example, limestone can be dissolved by slightly acidic rainwater.Sheet Erosion: This is when water moves in a thin layer over the land, removing a uniform layer of soil. It does not involve dissolved particles.Wind Erosion: Wind moves soil particles by lifting them up and carrying them away. It mainly affects loose and dry soils but does not involve dissolved particles.Gravity Erosion: Also known as mass wasting, this involves the movement of soil and rock down slopes due to gravity, such as landslides and rockfalls. Dissolution is not a driving factor here.complete question:
Which kind of erosion involves dissolved particles??
A. Chemical
B. Sheet
C. Wind
D. Gravity
What is the purpose of age structures?
A. They provide a way to study the overall age demographics of a population.
B. They can be used to plan for the number of nursing homes needed in a given area.
C. To advocate for small class sizes in schools
D. To know how many children live in a specific community
Answer:
A. They provide a way to study the overall age demographics of a population.
Explanation:
" it's a summary of the number of individuals of each age in the population. Age structure is useful in understanding and predicting population growth."
Answer: Hence, Option 'a' is correct.
Explanation:
Age structures is the proportion of population that belongs to different age group.
The purpose of age structure is that it provide a way to study the overall age demographics of a population.
With the age structures, we get to know about the prevailing age groups mostly present in particular area or country or world wide.
Hence, Option 'a' is correct.