Answer:
Cell divison is defined as the process in which a parent cell split into two or more daughter cells. There are three stages of cell division that includes interphase, mitosis/meiosis and cytokinesis.
In the interphase the proteins, enzymes and cell organelles are formed and at the end of this phase single strand chromosome becomes a double strand carrying genes.
In the meiosis (in sexual reproduction) or mitosis (asexual reproduction) phase, divison of nucleus takes place. Meiosis gives rise to geneticaly different cells due to crossing over while mitosis leads to identical cells .
Cytokinesis occurs cocurrently after meiosis or mitosis in which cytoplasm of a parental cell divides into two daughter cells each with identical chromatin.
Creation of new animals are also undergo these 3 stages of cell division that is interphase, meiosis (eukaryotes)/mitosis (prokaryotes) and cytokinesis. Majority of animals (eukaryotes) undergo meiosis phase because their mode of reproduction sexual and have genetic variation due to crossing over of chromosomes and produces 4 daughter cells at the end cell division.
Hence, the 3 stages of cell division is similar to craetion of new animals.
Pls help w 7, 8, 9, and 10
Answer:
7. B
8. C
9. B
10. I cant see all anwers but it is not A or C either B or D.
Explanation:
In South China during the late Carboniferous period, was the air temperature warmer or cooler than the air temperature in that location today?
Answer:
Hot, humid temperatures than today.
Explanation:
The Carboniferous period is was a geologic period that spans about 60 mn years ago and is named for the coal-bearing period. In the beginning, the climate was warm and hot had temperature about 20 degrees, but in the middle cooling occurred and the temperature was about 12 degrees. The cooling and drying of the climate lead to the Carboniferous rainforest. The planet was much hotter and more humid than we see it today and had more carbon dioxide and greenhouse gases in the atmosphere than exists today.Health-care workers are exposed to many different types of
pathogenic and nonpathogenic microorganisms. Which body systems
work together to protect the body from pathogens?
a Digestive and excretory
b Muscular and vascular
c O Circulatory and immune
d Endocrine and reproductive
The body system that works together to protect the body from pathogens is circulatory and immune. Thus, the correct option for this question is C.
What is meant by the Body system?The body system may be defined as the collection of organs and tissues that significantly work together in order to perform important functions in the body. Each organ within the body of animals and plants has a specific role that has to be carried out.
According to the context of this question, the circulatory system is responsible for the transport of nutrients and oxygen through the blood throughout the body. While the immune system is responsible for giving protection against foreign molecules known as antigens.
Exposure to many different types of pathogenic and nonpathogenic microorganisms is detected by the immune system which stimulates antibodies against them.
Therefore, the circulatory and immune system are the body systems that work together to protect the body from pathogens. Thus, the correct option for this question is C.
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Which of the following statements is true regarding the mechanisms of antimicrobial action?
SELECT ALL THAT APPLY
Group of answer choices
A single chemotherapeutic agent should work on many different targets on a pathogen.
Antisense nucleic acids interfere with protein synthesis.
Beta-lactam antibiotics have an effect on bacterial and fungal cells because they both have cell walls.
Nucleic acid analog drugs have no effect on human cell replication function.
Because all cells engage in protein synthesis, there are few antimicrobial drugs that selectively inhibit this process.
An antimicrobial that inhibits cell wall synthesis will result in the cells becoming more susceptible to osmotic pressure.
Answer:
a and b
Explanation:
The true statements regarding the mechanisms of antimicrobial action are:
Antisense nucleic acids interfere with protein synthesis.Beta-lactam antibiotics have an effect on bacterial and fungal cells because they both have cell walls.Nucleic acid analog drugs have no effect on human cell replication function.Options (2) (3) (4) are correct.
Antisense nucleic acids: Antisense nucleic acids are synthetic molecules designed to bind to specific mRNA sequences, preventing protein synthesis. This interference with protein synthesis can inhibit the growth and replication of pathogens.
Beta-lactam antibiotics: Beta-lactam antibiotics, such as penicillin, target bacterial cell walls by inhibiting enzymes involved in their synthesis. Bacterial cells and fungal cells both possess cell walls, making them susceptible to the action of beta-lactam antibiotics.
Nucleic acid analog drugs: Nucleic acid analog drugs, such as antiviral medications, are designed to mimic the structure of nucleic acids and interfere with viral replication. These drugs specifically target viral enzymes and processes involved in viral nucleic acid replication, without affecting human cell replication.
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As mass increases, what is the effect on the star’s temperature?
Answer: As the mass of star increases, the temperature and luminosity also increases.
Explanation:
This can be described in what happens in main sequence star( example, the Sun), which is powered by fusion of hydrogen into helium in its core. Main sequence star exhibit a common characteristic which is hydrostatic equilibrium. This means,the inward force of gravity, which tends to compress the star, is balanced by the outward force due to the pressure. Thus when an extra mass such as hydrogen is added to its core, there will be increase in mass which leads to a higher compression. This in turn will lead to central density and temperature. As the temperature increases, fusion of gases occurs faster resulting to a much higher luminosity. I hope this helps, thanks.
Identify the plant organs seen in the drawing. A Leaf B Bark C Route The parts of a tree are labeled. The green top part is labeled A. The brown part above ground is labeled B. The part underground is labeled C.
Answer:
A. Leaves
B. Stem
C. Roots
Answer:
A. Leaves
B. Stem
C. Roots
Explanation:
6. The height of tides changes throughout the day mainly because
a. the Earth rotates on its axis, changing the side of Earth that faces the moon.
b. the Earth rotates on its axis, changing the side of Earth that faces the sun.
c. the moon revolves around Earth throughout the day.
d. the Earth rotates on its axis and the spin causes water to be "left behind".
Answer:
THE MOON
Explanation:
TYE MOON PULLS ON EARTH WJGH GRAVITY
Final answer:
The height of tides changes mainly due to the rotation of the Earth on its axis, which changes the side facing the moon, leading to the formation of tidal bulges and resulting in two tides per day. The correct answer is: a. the Earth rotates on its axis, changing the side of Earth that faces the moon.
Explanation:
The height of tides changes throughout the day mainly because the Earth rotates on its axis, changing the side of Earth that faces the moon. Ocean tides are a very observable result of the Moon's gravity acting on Earth, creating a high tide on the side of Earth nearest to the Moon, where the Moon's gravitational pull is strongest. Additionally, high tide also occurs on the opposite side of Earth because Earth is pulled toward the Moon more than the water on the far side. As Earth rotates, the tidal bulge keeps its orientation with the Moon, and thus there are two tides per day because the Moon moves in its orbit each day as well.
Differences among members of the same species are called ____. *
a. predators
b. selections
c. similarities
d. variations
Answer:
D. Variations. :D
Answer:
D- Variations
Explanation:
The word variation means, differences between at least 2 objects. They can be major or minor variations. For example, Yellow Labs have webbed feet, but Boxers do not.
PLZ Help
Which of the following is not a significant threat to the world’s rainforests?
a
grazing
b
logging
c
shipping
d
agriculture
Question 2
Which of the following is a natural disaster that can have a significant impact on human populations?
a
volcano
b
all of the above
c
earthquake
d
hurricane
Question 1: Shipping
Question 2: All of the Above
List two of the three major steps taken to prevent the contamination from occurring again?
Which is statement describes diagram above
The correct answer is B. DNA transcription is producing messenger RNA.
The diagram given in the question shows the process of DNA transcription, which is the process of copying DNA into messenger RNA (mRNA).
Here's a breakdown of the diagram:
The double helix on the left represents the DNA molecule.
The enzyme RNA polymerase attaches to the DNA at a specific starting point called the promoter.
RNA polymerase unwinds the DNA helix and separates the two strands.
Using the DNA template, RNA polymerase builds a complementary mRNA molecule.
The mRNA molecule detaches from the DNA and moves away.
The DNA helix rewinds itself.
The diagram is showing the process of DNA transcription, which is how DNA is copied into mRNA.
Complete Question:
The statement that describes the diagram above is that the DNA transcription is producing messenger RNA. That is option B.
How does the diagram show DNA transcription into RNA?
The double helix on the left represents the DNA molecule.
The enzyme RNA polymerase attaches to the DNA at a specific starting point called the promoter.
RNA polymerase unwinds the DNA helix and separates the two strands.
Using the DNA template, RNA polymerase builds a complementary mRNA molecule.
The mRNA molecule detaches from the DNA and moves away.
The DNA helix rewinds itself.
The diagram is showing the process of DNA transcription, which is how DNA is copied into mRNA
5. The "largest shovel of its kind in the world" can shovel how much dirt in an
hour?
a. 7000 tons
b. 8000 tons
c. 9000 tons
d. 10,000 tons
Answer:
a. 7000 tons
Explanation:
Big Brutus is the world's largest electric shovel. It stands 16 stories high amid the fields of rural southeast Kansas. The coal strip mine it helped clear of rock and dirt has long been shut down, and Brutus has been turned into a museum.
The Bucyrus RH400, now owned by Caterpillar, is said to hold the title of the world's biggest hydraulic excavator. This monster is a front shovel excavator and weighs in at around 980 tonnes. This mine chewer has an undercarriage width of 8.6 meters and crawler length of 10.98 meters.
Big Brutus' bucket could lift 150 tons of coal, and worked at a speed of 0.22 MPH, 24 hours a day,and 7000 tons per hour.
List the six (6) function of proteins
Answer:
Protein helps the growth and maintenance of your tissues, it allows key chemical reactions to function right in your body, provides various parts of your body with strength, structure, and elasticity. It helps you maintain proper pH values in your body and balance fluid in your blood. It provides energy and transports nutrients throughout your body.
Plants are called 1 ) _________ because they make their own food source. Many people believe they are “feeding” a plant when they put it in soil, water it, or place it outside in the Sun, but none of these things are considered food. Rather, plants use those as ingredients to form sugar. This process is called 2 ) __________ and is performed by all plants, algae, and even some microorganisms. To perform photosynthesis, plants need three things: 3 ) ________________, water, and sunlight.
Fill in the blanks
Answer:
Explanation:
1) Autotrophs
2) Photosynthesis
3) Chlorophyll
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What will happen to the magenta molecule once all the darker blue/purple sections have been removed?
A. all of the these things
B. it will exit the nucleus and find a ribosome in the cytoplasm so it can be translated into a protein
C. a polyA tail will be added to the 3' end
D. a cap will be put on the 5' end
Final answer:
After the removal of introns from the pre-mRNA, a cap is added at the 5' end and a polyA tail at the 3' end, marking the maturation of the mRNA. The mature mRNA is then exported from the nucleus to the cytoplasm, where it finds a ribosome for translation into protein.
Explanation:
Once the darker blue/purple sections, which are introns, have been removed from the magenta molecule, which is a pre-mRNA, several key events happen. Firstly, a 5' cap is added to the 5' end to protect the nascent mRNA from degradation and to assist in the later process of translation initiation. Secondly, a polyA tail is added to the 3' end. The addition of these structures indicate that the mRNA is now mature, not defective and it helps to prevent rapid degradation in the cytoplasm.
After these modifications, including splicing, the mature mRNA molecule is ready to be exported from the nucleus to the cytoplasm via a nuclear pore complex. Once in the cytoplasm, the mRNA finds a ribosome to begin the translation process, eventually synthesizing a specific protein coded by the mRNA sequence.
Why is competition for biotic resources a key factor in the success of an organisms or a population in an ecosystem
Competition for biotic resources is a key factor in the success of an organism or a population in an ecosystem because it stops the process of overpopulation and allows the organisms to survive the strongest.
What is an Ecosystem?An ecosystem may be defined as a place or area where members of different species live together and interact with one another for the purpose of food, space, and mating partner.
Competition is a type of negative, negative interaction where both species are harmed. In this type of interaction, both species compete over food, space, and other resources. Competition prevents the population of species not to increase rapidly due to various effects.
As a result of this, the size of the population does not alter much with respect to time. But if there is no competition, the size of the species easily attains the carrying capacity.
Therefore, competition significantly stops the process of overpopulation and allows the organisms to survive the strongest.
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Complete the table--called a character matrix-below. Place a check (V) if 7 points
the species has the trait and leave it blank if it does not
compound
cones
cone
scales
without
wings
large
bladelike
wings
pollen
without air
sacs
smaller
scaly
leaves
small
fleshy
cones
A. fibrosa
Bois
bouchon
Coral reef
pine
Monkey
puzzle tree
Norfolk
Island pine
d
ENG
The question is asking to fill in a character matrix for several species based on a list of given traits. You would need a solid knowledge about these species to accurately complete this task.
Explanation:To complete the
character matrix
, you need knowledge about the characteristics of the mentioned species: A. fibrosa, Bois bouchon, Coral Reef Pine, Monkey puzzle tree, and Norfolk Island pine. The information on traits - compound cones, cone scales without wings, large bladelike wings, pollen without air sacs, smaller scaly leaves, and small fleshy cones should be carefully evaluated against each species. With a check (V) marking a species possessing a certain trait, and a blank symbolizing its absence, the filled table visually represents the relation between each plant's specific traits. For example, if A. fibrosa has large bladelike wings, place a check (V) in the corresponding box.
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which of the following is a chemical change?
a. silver tarnishing as the silver metal reacts with sulfur
b. soil drying as water evaporates
c. a solution of salt water being diluted as water is added to it
d. a rock eroding as the wind removed particles from it
Answer:
Silver tarnishing as the silver metal reacts with sulfur
Explanation:
It is a chemical reaction because the metal is changing its chemical composition due to the sulfur
How does deforestation increase the amount of CO2 in the atmosphere? Explain.
Answer:
Getting rid of trees means they can't photosynthesis
Explanation:
Photosynthesis is the process that all plants and trees do, they take in the CO2 that we breathe out and they turn it into oxygen for us to breathe in. If deforestation (getting rid of many trees) happens, it means they can't photosynthesis meaning CO2 stays in the air!
Hope this helps!
Answer:
Deforestation by fire is the worst polluter as not only does the fuel burning increase carbon dioxide in the air as it releases during the burn but the trees that have perished can no longer absorb carbon dioxide from the atmosphere to produce oxygen.
Explanation:
which kingdom is completely off unicellular organisms that are prokaryotic
Thats a kingdom of Archaea
The kingdom made up of unicellular prokaryotic organisms falls under two domains: Bacteria and Archaea. These organisms were the first cells to evolve on Earth, and can survive in a wide range of environments.
Explanation:The kingdom that is entirely made up of unicellular organisms that are prokaryotic falls under two domains: Bacteria and Archaea. These domains consist of unicellular organisms that lack a nucleus and other membrane-bound organelles. The prokaryotes, under both these domains, were the first cells to evolve on Earth, approximately 3.5 to 4.5 millions of years ago. They exemplify significant diversity in form and function, covering a wide range of environments from extreme conditions to moderate ones like the human digestive system.
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If the climate is causing the changes in the buffalo population, what do you predict the graph of the rainfall would look like?
Answer:
As the rainfall increases the buffalo population will increase (i think
Explanation:
In this exercise we have to use the knowledge of climate change on the buffalo population, so we can explain that:
Buffalo population does change in relation to the climate because if the climate affects the carrying capacity, by affecting the resources.
How does climate change affect ecosystems?At the species and population level, in general, changes in temperature and rainfall can harm development and reproductive rates, increase mortality, affect immunity to diseases, reduce mobility.
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Diffusion occurs due to particles
What are the reactants of photosynthesis and where do they come from?
Answer:
whenever plants photosynthesize they use the sun to male sugar for themselves. they take is carbon dioxide and sunlight and give out oxygen
I don't really understand this
the answers are:
1. 2, 4, 1, 3
2. 2, 4, 3, 1
3. 4, 1, 2, 3
4. 4, 2, 3, 1
Answer:
A/1
Explanation:
4 cannot be first eliminating 3 and 4, then we have to decide, does the genetic variation change before or after the better adapted produces more offspring?
The answer is after.
Once they stop producing since they are dying, the less well adapted variation will die out, altering the genetic variation
I hope this helps u!
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Tina and Jill have two balls, ball A and ball B. Ball A is twice as heavy as ball B. Tina and Jill push the balls with the same strength
across the same flat surface.
What will happen to the balls?
A.
Neither ball will roll at all
B.
Ball A will roll faster.
C.
Ball B will roll faster.
D. Ball A and ball B will roll at the same speed.
Answer:
c
Explanation:
it is lighter and force aginst it is not at great as ball A
List the three major classes of mollusks.
Answer:
gastropods, bivalves, and cephalopods
They are the three main types of mollusks.
Final answer:
The three major classes of mollusks are Bivalvia, Gastropoda, and Cephalopoda. Bivalvia includes mollusks with two shells, Gastropoda comprises snails and slugs with shells or none, and Cephalopoda includes marine organisms like squids and octopuses. Mollusks have a basic body plan with a foot, viscera, and mantle, which can produce shells, and many have a radula for feeding.
Explanation:
List the Three Major Classes of Mollusks
The three major classes of mollusks are Bivalvia, Gastropoda, and Cephalopoda.
Bivalvia: This class includes mollusks with two shells, such as oysters, clams, and mussels.
Gastropoda: Members of this class, such as snails and slugs, often have a shell which can be planospiral or conispiral and an asymmetrical body plan.
Cephalopoda: This marine group, which includes octopus, squid, and the chambered nautilus, contains some of the largest invertebrates.
Basic Body Plan of a Mollusk
The basic body plan of a mollusk includes a foot for movement, viscera, and a mantle that may secrete a shell.
The Mantle and Radula
The mantle is a significant part of the mollusk's anatomy, usually forming a cavity for breathing and excretion, and it can produce the mollusk's shell. The radula is a unique, tongue-like organ that most mollusks use to feed by scraping or cutting food before ingestion.
Hookworms live inside the intestines of dogs. As the dog eats, the hookworms consume partially digested food. As a result of this nutrient diversion, the dog can become malnourished and weakened. Which BEST describes the relationship between the hookworms and the dog?
a.) a predator-prey relationship
b.) a mutualistic relationship
c.) a producer-consumer relationship
d.) a parasitic relationship
Answer:
a
Explanation:
this is because it is sharing in the food that is meant for the organism
Answer:
the correct answer is D
a parasitic relationship
A Type I significance error occurs when a researcher claims that there is __________. A. enough statistical support for the research hypothesis when there is not B. not enough statistical support for the research hypothesis when there is C. enough statistical support for the research hypothesis when there is D. not enough statistical support for the research hypothesis when there is not Please select the best answer from the choices provided A B C D
A Type I significance error occurs when a researcher claims that there is sufficient statistical support for a research hypothesis, while there is not. So, the correct option is A.
What is Hypothesis?A hypothesis is defined as a proposed explanation for a phenomenon that must be a scientific hypothesis where the scientific method requires that one be able to test it. Scientists usually base scientific hypotheses on past observations that cannot be satisfactorily explained with available scientific theories.
A hypothesis is also said to be an assumption which is an idea proposed for reasoning in order to test it to see whether it can be true or not. In the scientific method, hypotheses are formulated prior to any applied research, in addition to a basic background review.
Therefore, the correct option is A.
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How might the human body be compared to a car bicycle? Need help like now!
Answer:
Like the human body, the bicycle relys on other things to keep moving. For example, in order for the bicycle to keep moving, the rider needs to have legs and be able to push the pedals foreward. In order to breath, the body needs to have lungs and those lungs depend on the heart to pump blood throughout the body. The lungs rely on the heart and your brething relys on your lungs. Hope this helped, brainliest always appreciated.
Explanation:
Is a tapeworm a parasitic worm
Answer:yes
Explanation: