Answer:
D
Explanation:
In your own words, explain how energy moves through an ecosystem
Answer:
The energy in most ecosystems flows through the food chain. In physical ecosystems and most marine ecosystems, the energy flow starts in green plants that harvest some of the sun’s energy. The plants are then consumed by animals, bacteria, and other creatures, which are themselves eaten by other creatures. At each step in the food chain, energy is lost as heat.
Explanation:
What is true about discipline?
O It reacts to behavior
O It is about preventing misbehavior
O It is only for teens and adults
Olt rarely uses consequences for behavior
Answer:
2
Explanation:
preventing misbehavior
What is meant by “pressure” in a scientific sense? What units are used to measure pressure?
Answer:
Pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distribute.
The SI unit for pressure is the pascal, equal to one newton per square metre. Other units of pressure, such as pounds per square inch (Ibf/in2), bar and atmosphere, are also in common use.
The beak size in a species of bird is influenced by a gene for which only two alleles exist. The allele that results in a large beak is dominant to the allele that results in a smaller beak. If introduction of a new food source causes the birds with smaller beaks to be better fit to survive, which of the following will most likely happen?
The allele for small beaks will become dominant to the allele for large beaks.
The bird population will decrease as the recessive allele becomes more common.
The birds with large beaks will die out as a result of lack of food.
The frequency of the allele that results in small beaks will increase.
Answer:
I think that the birds with large beaks will die out as a result of lack of food. (c)
Explanation:
If the smaller birds are better fit to survive then selective pressures should decrease the number of birds with larger beaks.
A ten mile area of Trees (B) is removed from the tropical rainforest. How will this affect the amount of water (A) and the amount of oxygen (A) in the area?
This is on Ecology. The A is Abiotic. The B is Biotic. If you don't know this then don't answer.
Thank you
NEED HELP FAST!!! At which stage of human development does cell differentiation begin?
Select one:
a.blastocyst
b.egg
c.zygote
d.infancy
Answer:
(c) zygote is the answer
Explanation:
How does a single cell develop into many different types of cells? During the third week after fertilization, the embryo begins to undergo cellular differentiation. Differentiation is the process by which unspecialized cells become specialized.
A high population of greater prairie chickens once inhabited the prairies of Illinois. The conversion of the prairies into agricultural land caused the chickens to lose their habitat. Studies have concluded that this change greatly reduced the greater prairie chicken population. The habitat loss also resulted in a decrease in the population’s genetic variation.
Which change in the gene pool occurred in the greater prairie chicken population?
gene mutation
gene flow
genetic drift
genetic resistance
The answer is C. genetic drift
Genetic drift affects the population size and decreases genetic variability by setting some alleles and losing others. Option C. The exposed example is a case of genetic drift - bottleneck effect -.
What is genetic drift?
Genetic drift is an evolutive force. It refers to the random change that occurs in the allelic frequency of a population through generations.
The magnitude of this change is inversely related to the size of the original population.
These changes produced by genetic drift accumulate in time. Eventually, some alleles get lost, while some others might set. Genetic variation in the population decrease.
Genetic drift affects a population and reduces its size dramatically due to
a disaster or pressure ⇒ bottleneck effectthe population split ⇒ founder effect.The exposed example is a case of the bottleneck effect. The conversion of the prairies into agricultural land and the consequent habitat loss is the pressure acting on this prairie chickens population. The population decreases in size and decreases its genetic variation.
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how does dna replicate
What are the Negative impacts on solar systems
Answer:
The potential environmental impacts associated with solar power—land use and habitat loss, water use, and the use of hazardous materials in manufacturing—can vary greatly depending on the technology, which includes two broad categories: photovoltaic (PV) solar cells or concentrating solar thermal plants (CSP).
Explanation:
Which are organs of the digestive system?
Answer:
The main ones are the mouth, stomach, small intestine, large intestine, the liver, etc.
Explanation:
Hope this helps :)
Answer:
Theres a lot LOL:
- esophagus
- stomach
- large intestine
- small intestine
- liver
- pancreas
- gallbladder
Explanation:
A woman bought 10 crates of eggs from the market. On getting home, she realized that 15 eggs were broken. What is the ratio of broken eggs to unbroken eggs.
Answer:
B:U = 1:20
Explanation:
Let the number of broken eggs be B.
Let the number of unbroken eggs be U.
Given the following data;
Number of crates of egg = 10 crates
But, 1 crate of egg = 30 eggs
10 crates of egg = 30 * 10 = 300 eggs
B = 15 eggs
U = 300 eggs
Ratio B to U = B:U
B:U = 15:300
Dividing by 15, we have;
B:U = 1:20
Which of the pathogens could most likely be effectively treated with antibiotics?
A) only step throat
B) only tuberculosis and strep throat
C) only tuberculosis and common cold
D) All of the three pathogens are effectively treated with antibiotics
Answer:
B
Explanation:
You wont need to go get antibiotics to treat a common cold, just use over the counter meds. Strep and tuberculosis are more contagious and powerful.
Use your understanding of prevention and treatment of viruses to answer the questions below.
A
is a substance containing incomplete portions of a virus that produce an immune response when injected into the body.
I'm a bit confused about this question. But I will try my best to answer. :)
To prevent a certain virus, or increase someone's immunity towards a virus, doctors give patients a shot/vaccine. For example, people get a flu shot yearly to help prevent them from getting the flu. The shot contains a small portion of the flu itself. The flu remains dormant until the body decides to activate it or fight it off. This also helps the body become more immune to the virus/sickness and fight it off easier.
I hope this helps! :)
A hapten is a substance containing incomplete portions of a virus that produce an immune response when injected into the body.
What is the Immune response?The immune response may be defined as the type of reaction that occurs in response to specific antigens or foreign agents. Such types of responses defend the organism against foreign invaders.
A hapten is essentially an incomplete antigenic particle. Such small substances or molecules only elicit an immune response when attached to a carrier known as proteins.
Carrier molecules typically do not elicit an immune response by themselves.
Therefore, it is well described above.
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differiantiate between photolysis and carbon (IV)oxide fixation
Answer:
photolysis is the process ny which chlorophyll molecules absorb light energy which is used to split water molecules into oxygen and hydrogen atoms
Which of the following is true about every energy transformation?
A.some energy is given off as waste
B.some energy is destroyed
C.some energy is created
D.some energy is given off as heat
Answer:
d
Explanation:
energy can neither be created nor ut can be destroyed
An example of selective breeding would be
a
breeding a rabbit with another rabbit to increase the population
b
an orange house cat breeding with a feral cat in the wild
c
using wild horse DNA to create a transgenic race winning horse
d
breeding a cow with a bull who produces large muscular baby bulls
Answer:
D
Explanation:
Selective breeding is when you a breeding 2 organisms in order to make a specific trait be passed down to the offspring. Since you the offspring in this scenario have larger muscles, this is selective breding because you are "choosing" a trait. A and B don't mention specific traits, and C is wrong because you can't garuntee that the offspring will win a race. D is the most logical choice
What are the most basic blocks o all organisms
Answer:
This is your answer ☺️☺️☺️
Which of the following is an example of deposition?
a. glaciers wearing down layers of rock b. a muddy river carrying sediment downstream c. ponds filling up with sediment and becoming marshes d. frost wedging splitting rocks apart
Glacial erratics are the name given to these rocks. Erratics serve as a log of a glacier's journey. Complex flow patterns can be discovered by looking for the bedrock units that match with erratics. Thus option A is correct.
What glaciers wearing down layers of rock?The rocks and the ground below are both eroded as a result of the friction caused by glaciers carrying rocks. In this manner, glaciers pulverize rocks and remove dirt. Mountain valleys with steep sides are created by advancing glaciers carving out basins. Moraine, an eroded debris, is frequently seen on and surrounding glaciers.
Mechanical weathering causes the rock on valley walls to become loose as glaciers flow, where it then falls as debris. Rocks of any size, from enormous boulders to silt, can be carried by glaciers. Over many years and decades, these rocks can be transported a great distance.
Therefore, glaciers wearing down layers of rock.
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What is a summary about how clouds form. Help asap plzzzz.
Which statement about sexual and asexual reproduction is true? *
2 points
A) There is more genetic variation in organisms that reproduce sexually than those
that reproduce asexually.
B) There is a lot of genetic variation in organisms that reproduce only asexually.
C) There is no difference in the level of genetic variation by the two modes of
reproduction
OD) Only yeast and bacteria reproduce asexually.
Bailas s
Answer:
The answer is A. There is more genetic variation in organisms that reproduce sexually than those that reproduce asexually.
Explanation:
This is because offspring with two parents can get genetics from both family's which means there is a chance for many different types of characteristics.
If an offspring only has one parent however, the offspring will only get those genetics from the parent which means there are not many possibilities for offspring to look or act different then their parent.
Hope this helps! Have a good day! or don't...it's up to you- <3
_________is the breaking down of biomolecule components (food) for use by cells.
Answer:
Chemical Digestion
Explanation:
Select the correct answer.
What is the first thing you should look for on a food label?
OA. calories from fat
OB.
calories
OC. serving size
OD
number of servings
Answer:
The answer is C serving size.
Explanation:
Looking at the serving size may be the best idea. If you see the serving size for example: 9 pieces, and that's 190 calories. You may not even want to eat 9 pieces. That's a lot. So if you eat only 3 like me you only have 63 1/3 calories now.
The point is: there is no point looking at the calories if you aren't going to eat the serving size amount.
Hope this helps. :)
What is the purpose of the pulmonary artery?
Answer:
Hey mate.....
Explanation:
This is ur answer....
Pulmonary circulation pumps deoxygenated blood through the pulmonary artery. This artery divides above the heart into two branches, to the right and left lungs, where the arteries further subdivide into smaller and smaller branches until the capillaries in the pulmonary air sacs (alveoli) are reached.
Hope it helps!
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How does the circulatory system work at the organ level?
Nutrients are delivered throughout the body.
Cardiac muscle contracts.
The heart pumps the blood.
Blood cells carry nutrients.
Answer:
the third one
Explanation:
i took the test honey boo
Which two characteristics do seedless vascular plants have that nonvascular plants do not have?
A) they have phloem and true stems
B) They have roots and use spores to reproduce
C) They live in moist environments and have xylem
D) They have phloem and use spores to reproduce
Answer:
C) They live in moist environments and have xylem.
please help asap! i’ll mark u brainliest
Answer:
A, E, B, D, C
Explanation:
I need help please and thank you
What is the main function of the Krebs cycle?
A. To break glucose down into two pyruvate molecules
OB. To produce carbon dioxide for use in the thylakoid
O C. To produce large numbers of ATP molecules
O D. To provide molecules for the electron transport chain
What will be the frequency of the recessive allele in a population of 100 kangaroos if there are 50 dominant alleles? (I already tried 0.50 and it was wrong)
A)150
B)0.25
C)0.75
D)0.50
What will the frequency of the dominant allele in a population of 100 tigers if there are 90 dominant alleles?(I already tried 0.9 and it was wrong)
A)0.9
B)0.1
C)0.45
D)0.55
The frequency of the recessive allele in a population of 100 kangaroos in which there are 50 dominant alleles is 0.75 (Option C). It is population genetics.
What is population genetics?Population genetics makes reference to the estimation of genotypic and allelic frequencies in a population.
In this case, the population has 100 kangaroos, thereby there are 200 alleles (50 of which are dominant, i.e., 25% dominant allele).
Moreover, the frequency of the dominant allele in a population of 100 tigers where there are 90 dominant alleles is 0.45 (200 alleles = 100% >> 90 alleles = 45%).
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Answer: 0.45
Explanation:
The pigment in chloroplasts that absorbs light energy is called
Answer: Chlorophyll
Explanation: The primary pigment used in photosynthesis, reflects green light and absorbs red and blue light most strongly
A grassy meadow high in the Sierra Nevada Mountains of eastern California is known to support a variety of organisms. During the summers when grass is thick and lush, and wildflowers abound, butterflies take advantage of this abundant nectar source. Bears graze on the berries in shrubs at the edge of the meadow. Deer also forage at the edge of the meadow. In the early mornings, coyotes are known to prey on the squirrel and mouse populations that burrow into the meadow soil. A variety of birds prey on the butterflies and other flying insects, such as bees and wasps. The coyotes would be classified as ____. Group of answer choices
Answer:
carnivore and secondary consumers
Explanation:
Carnivorous are organisms that fulfill their energy requirements by feeding animal tissues and/or meat, either hunting or scavenging. In the food chain, secondary consumers are those organisms that obtain energy by eating primary consumers (herbivores). In this case, the coyotes can be easily classified as carnivores and secondary consumers because they hunt squirrels and mice, which in turn eat autotrophic plants (primary consumers).