What are the four steps of natural selection?

Answers

Answer 1

•Variation. Organisms (within populations) exhibit individual variation in appearance and behavior. ...

•Inheritance. Some traits are consistently passed on from parent to offspring. ...

•High rate of population growth. ...

•Differential survival and reproduction

Answer 2

Answer:

reproduction, heredity, variation in fitness or organisms

Explanation:

Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population. If they are met, natural selection automatically results.


Related Questions

Which climate is best for supporting both plant and animal life? A.Tropical Rainforest B. Tundra C. Temperate Deciduous forest D. Desert E. Savanna F. Taiga

Answers

Deciduous forests, it holds both plant life and animals that thrives extremly well.

what products are made from the process of photosynthesis

Answers

Answer: glucose and oxygen

Explanation:

The formula for photosynthesis is:

Carbon dioxide+water-->glucose+oxygen

Anything on the right of the arrow is the products so, it is glucose and oxygen.

Hope this helps :)

Answer:

glucose and oxygen

Explanation:

plants need carbon dioxide that human and animal release in order to manufacture food(photosinthesize)

in return,they give is oxygen and glucose from the food it produces

What part of the endocrine system does hypoglycaemia affect?

Answers

Glucagon and epinephrine levels surge in response to acute hypoglycemia and appear to be the first line of defense. Cortisol and growth hormone levels also increase acutely and are important in the recovery from prolonged hypoglycemia.

What is the name of the structures at the end of the bronchioles where gases are
exchanged?
Olarynx
Oalveoli
O trachea
Oepiglottis

Answers

Answer:

Alveoli

Explanation:

When radiometric dating is done on a rock sample, the rock's_____
is determined.

comparative age

relative age

absolute age

sequential age

Answers

Answer:

The answer is absolute age hope this help pls give me brainless.

All the different populations living in the same habitat or ecosystem make up _____ A.biodiversity
B.ecosystem diversity
C.genetic diversity
D.species diversity​

Answers

Answer:

D.species diversity

Explanation:

its D  because biodiversity,includes to all the many plants, animals, fungi, and microorganisms. And includes the many variety of ecosystems what's found on Earth. Ecosystem diversity, describes all of the different type of habitats around the world.

The correct answer is D

Draw and label a fish​

Answers

If I was you I would search up “labeled fish diagram” on the Internet and then just put a piece of paper up to the screen and trace over it with pencil! It’s quick and easy

how many bones has a crocodile? ​

Answers

250 bones

A crocodile has 250 bones.

Answer:

The average crocodile has 250 bones excluding skull and armor

Explanation:

I searched it up on GOOOGLEE

HELP WILL GIVE BRAINLIEST

Answers

Answer:

What are you talking about?

Explanation:

What

Key Term Matching
1. accessory organs
2. fundus
3. uvula
4. villi
5. large intestine
6. root
7. dentin
8. lamina propria
9. fauces
10. chyme
11. incisor
12. parietal cells
13. crown
14. stomach
15. cheeks
16. serosa
17. enamel
18. stratified squamous
19. gingivae
20. small intestine
21. pharynx
22. liver
23. molar
24. mucins
25. acinar cells
a. forms bulk of tooth
b. performs compaction
c. a cutting tooth villi
d. liquid food mixture in stomach
e. posterior opening of oral cavity
f. has three muscularis externa layers
g. portion of tooth above gum line
h. epithelium found in esophagus
i. are connected to GI tract by a duct
j. composed of loose connective tissue
k. dome-shaped stomach region
l. organ shared with respiratory system
m. substance harder than bone
n. exocrine part of pancreas
o. projection off of soft palate
p. in saliva to lubricate food
q. finger-like extensions of mucosa
r. portion of tooth below gum line
s. the gums
t. performs 90% of digestion and absorption
u. secretes bile
v. a grinding tooth
w. secrete HCI
x. outermost layer of GI tract wall
y. lateral walls of the oral cavity

Answers

2







is the right answer yk

factors that affect rate of erosion

Answers

Answer:

farm management, rainfall, climate, soil type, soil cover, landscape, type of wave, crops, rock strength and position of coast.

Explanation:

Erosion can be defined as a geological process which typically involves the wearing out of earthen (soil) materials and the transportation of these materials by natural forces like water, wind, etc. Soil erosion is greatest when the soil is steep.

The steepness of a body such as river or stream refers to the downward slope or gradient of the body of water.

Generally, the steepness of a body affects the rate at which other materials would flow or move around. Thus, the steeper a river or stream, the greater would be its rate of erosion.

Other factors that affect the rate of erosion in an area include the following; farm management, rainfall, climate, soil type, soil cover, landscape, type of wave, crops, rock strength and position of coast.

What are the five human impacts on the environment? (I would prefer them in point form, but i understand if you cant do that

Answers

Answer:

1. pollution

2.climate change

3. misuse of natural resources

4. erosion

5.loss of biodiversity

Explanation:

Answer:

overpopulation, pollution, burning fossil fuels, and deforestation.

Explanation:

You are a botanist hired in the future to make a distant planet, Xyloph, habitable for human life. Your job is to help seed the planet with plant life by working with the terraforming team. All four major kinds of plants will be introduced into this new world. You are to help familiarize the terraforming team with the four different kinds of plants on earth. In three well developed paragraphs, describe each of the four major plant groups (seedless vascular, nonvascular, angiosperms, and gymnosperms). Your description should include, but not be limited to, the following: Description of general physical features and characteristics of each plant group. Discussion of living conditions where each plant group survives best. Explanation of specific abiotic conditions necessary for the success of that group, when applicable.

Answers

Answer:

A series of missions to the moons of Jupiter and Saturn has revealed their potential to harbour life. Nina Notman looks to the skies

After a series of mission failures, July 1965 saw the first successful flybys of Mars. The US Mariner 4 became the first spacecraft to take close up pictures of another planet, beaming 22 images of the impact-cratered Martian surface back to Earth. Since then, more than 20 successful missions have explored the red plant’s atmosphere and surface.

Thanks to the images and data collected– and by telescopes, both on earth and in space – we now know that billions of years ago, Mars had the three critical ingredients for life. It had an abundance of the chemical building blocks, liquid water on its surface and an energy source (volcanic activity) to power the chemical reactions that make life possible (on Earth that energy source is the sun). Today, the inhospitable surface of Mars is thought to be unsuitable for life, but the possibility of life existing deep beneath its frozen surface hasn’t been ruled out. To date though, no evidence of life – ancient or otherwise – has been found. Mars being habitable, it turns out, doesn’t mean it actually has a habitat.

Source: NASA/JPL-Caltech/MSSS

Mars has all the ingredients for life – water, chemicals and energy – but no signs of living things yet

The search for Martian life is ongoing, with a further three missions to Mars planned to launch over the next few years. Longer-term, a number of space agencies are also aiming to collect samples from Mars and return them to Earth for more in-depth analysis. And the search for signs of extraterrestrial life is stretching to the depths of our solar system and beyond.

describe how carbon dioxide is produced by respiring muscle cells reaches the alveolar cavitiesin mammalian lungs​

Answers

Answer:

Hope this helps:

The carbon (iv) oxide which has been produced by the respiring muscle tissue is diffused into the bloodstream in the form of bicarbonates, a process facilitated by an enzyme called carbonic anhydrase. The carbon (iv) oxide is then carried to the lungs.

Explanation:

Which taxon includes more species, an order or a family?

Answers

Answer: order

Explanation:

Which of the following foods have fiber in them?
Your answer:
Peanuts
Granola
Bananas
All of the above.

Answers

Answer:

All of the above.

Explanation:

Bananas, peanuts, and granola are all great sources of fiber.

Hope this helps! :)

Rich in several important vitamins and minerals, bananas are also relatively high in fiber, with one medium banana containing about 3.1 grams of this nutrient

Peanuts are a good source of fiber, which helps reduce inflammation throughout your body as well as aids your digestive system

Granola is calorie-dense, as well as rich in protein, fiber, and micronutrients.



Answer is all above

2. Which of the following is indicated by the pH
value of a solution?
A. its hydrogen ion concentration
B. its ammonium ion concentration
C. its ability to undergo a chemical reaction
D. ils ratio of solute amount to solvent volume

Answers

Answer:

Option A

Explanation:

The pH of a solution is determined by the following formula

pH = -log [H+]

Here H+ is the hydrogen ion concentration

Thus, if pH is known one can determine the hydrogen ion concentration by taking its antilog.

Hence, option A is correct

Blue-white screening is a technique for the identification of___. It relies on the ability of____to cleave lactose. Blue-white tests take advantage of a molecule called____which is similar to lactose in that it is cleaved by B-galactosidase. When cleaved, the____(same as previous) turns . If uncleaved,meaning a non- function B-gal gene, the X-gal remains____. Therefore, a____bacterial colony means the B-galactosidase gene is not-functional, and therefore there____a recombinant gene inserted into the vector.
You’ve inserted a gene for pesticide resistance into your vector. To see if it was successful, you decide to conduct a blue-white screening test. But, uh-oh you are out of X-gal! You do notice some green Slime-gal sitting on the shelf and recall that this molecule works similarly to X-gal, but instead of turning blue when cleaved, it turns green when cleaved. You carry out the test, and find that all of your colonies are green! Was your insertion of the pesticide gene successful?

Answers

Answer:

Explanation:

Blue-white screening is a method for distinguishing proof of (recombinant bacteria). It depends on the capacity of ( B-galactosidase) to separate lactose. Blue-white tests exploit the molecule called  (x-gel)_ which is like lactose in that it is severed by B-galactosidase. When separated, the (5-bromo-4-chloro-indoxyl) (same as past) turns _(_blue). In the event that uncleaved, which implies a non-function B-gal gene, the X-gal remains (white)_. Subsequently, a __(white) bacterial province implies the B-galactosidase gene isn't practical, and in this way there ___lacz__ a recombinant gene embedded into the vector.

If glucose is metabolized under completely anaerobic conditions, pyruvate ( Please explain why each answer is wrong or right.)
a. immediately enters the Krebs cycle.
b. is converted by fermentation to lactate or CO2 and ethanol.
c. is converted back to fructose until the concentration of oxygen increases.
d. is converted to NADH.

Answers

Answer:

B.

Explanation:

A is wrong because pyruvate would enter the Krebs cycle under aerobic condition (when oxygen is present). Hence the name aerobic cellular respiration

C. I do not really too much about fructose or the concentration of oxygen, but I can assure that this answer choice is not correct.

D is wrong because NADH would be converted from NADP+. Either with oxidation or reduction, and this helps to keep this process going.

B is correct because fermentation is another word for anaerobic cellular respiration. The process takes place with the absence of oxygen. It either goes through Alcoholic or lactic acid fermentation.

I hope this helps!

VOCABULARY:
1. Asexual reproduction
2. Asters
3. Cell cycle
4
Call plate
S. Centromere
6. Chiasma
7. Chromatid
& Chromatin
9. Chromosomes
10. Clone
11. Crossing over
12. Cytokinesis
13. Diploid
14. Fertilization
15. Gamete
16. Haploid
17. Interphase
18. Karyotype
19. Kinetochore
20. Meiosis
21 Metaphase
22 Mitosis

Answers

5.cell plate is a cell in animal

List some of the diseases mentioned that have plagued humans from Egyptian nobles to now.

Answers

Answer: Many of the diseases which cause problems in today's society afflicted Egyptian populations. These include tuberculosis, malaria and schistosomiasis.

Explanation:

Allie was in the park playing on the equipment. She noticed that on the highest slide, she slides down
A)
without friction.
B)
with the slowest speed.
with the greatest speed.
D)
at about the same speed as the shortest slide.

Answers

the greatest speed

i had this question on a test and i got it right

what does NADP+ want to carry outside of the thylakoids?

Answers

In the light-dependent reactions, which take place at the thylakoid membrane, chlorophyll absorbs energy from sunlight and then converts it into chemical energy with the use of water. ... The lower energy form, NADP+, picks up a high energy electron and a proton and is converted to NADPH.

The smaller a population of organisms of a particular species, the
A.
more likely one of the organisms is to adapt to a changing environment
B.
more likely a mutation is to arise
C.
less likely the species will be able to survive in a changing environment
D.
less likely natural selection is to affect the population

Answers

Answer:

The correct answer is - D. less likely natural selection is to affect the population

Explanation:

The larger population of a species tends to produce more mutant individuals per generation than a smaller population per generation. In a larger population, it assists to get more genotypes and gets optimal genotypes quicker than smaller populations.

In larger populations, the process of natural selection is more effective and for the smaller population   Second, natural selection is less likely to affect the population which leads to less genetic diversity or change in order to survive due to stochastic sampling error  as some allele loss in random selection.

Compare and contrast point mutations and chromosomal mutations. Which part of the organism's DNA is affected as a result of each?

Answers

Answer:

In point mutation,the gene is affected however in chromosomal mutations,there is change in the structure or number of the chromosomes

The primary distinction among point mutation and chromosomal mutation is, the point mutation is a small mutation in which basically a single base pair of the either DNA or RNA encoding changes, whereas chromosomal mutation is a large-scale mutation in which the chromosome structure changes.

What is mutation?

A mutation is an alteration in an organism's DNA sequence. Mutations can take place as a consequence of mistakes in DNA replication during cell division, mutagen exposure, or viral infection.

Mutagens are environmental factors that results in mutations. Mutagens can be either radiation, chemicals, or infectious agents.

In living organisms, there are two kinds of genetic mutations namely point mutation and chromosomal mutation.

The nucleotide sequences are usually altered in both cases. As a result, all these types of mutations can result in fatal diseases.

The main difference between point mutation and chromosomal mutation is that point mutation is a small-scale mutation that changes a single base pair of the DNA or RNA encoding, whereas chromosomal mutation is a large-scale mutation that changes the chromosome structure.

Thus, this is the comparison between the types of mutation.

For more details regarding mutation, visit:

https://brainly.com/question/13923224

#SPJ2

which process is needed for evolution to occur? PLEASSE HELPPP THIS IS A BIG GRADE

Answers

Answer: D. Genetic mutation

Explanation:

For evolution to occur, there must be a genetic mutation in the genome of an organism such that a new allele is formed.

If this mutation occurred in the sperm and/or the ovum, the mutation will then be passed on through reproduction to the next generation. This leads to more of the subsequent generations having that mutation thereby leading to evolution.

Please answer please I need help thank you

Answers

Algae provides more energy to the Box Turtle population.

If you see the bottom of the chain, Algae, whether the turtles eat it or not, also provides energy/food/resource for other forms of energy the turtles can consume, it's the base of the chain.

The answer is not aquatic insects because they do not supply as energy to as many sources as algae.

Hope this helped!

What material was used to make shelters in the Stone Age?
Mammmoth bones
Stone
Animal hide

Answers

Answer:

Stone

Explanation:

These houses are more like our houses than any others in the Stone Age. They had foundations and they were built of wood and wattle and daub (a mixture of manure, clay, mud and hay stuck to sticks). They were sometimes made of stones. The roofs were made of straw.

A woman is admitted to the hospital with Bell's palsy caused by an inflamed facial nerve. You are the attending physician. What symptoms do you observe? How do you test her facial nerve?​

Answers

In Bell's palsy, the facial nerve that is injured and inflamed causes symptoms like twitching, weakness, or paralysis on one side of the face, sometimes both; drooling; a drooping eyelid or one corner of the mouth droops.

PLEASE HELP !! ILL GIVE BRAINLIEST *EXTRA 40 POINTS* DONT SKIP :(( .!

Answers

Answer: C

Explanation:

Viruses don't have cell walls that can be attacked by antibiotics; instead they are surrounded by a protective protein coat. Unlike bacteria, which attack your body's cells from the outside, viruses actually move into, live in and make copies of themselves in your body's cells

Other Questions
Before toilet paper, most bathrooms were stocked with old newspapers and catalog pages. In 1857, Joseph Gayetty tried to sell single sheets of paper. The public did not want to pay for what they already had for free. In 1879, Englishman Walter Alcock made the first roll of perforated sheets. That means sheets that can be torn apart. Finally, American brothers Clarence and Edward Scott made toilet paper a household item. How did they do it? Indoor bathrooms had become popular in the 1880s. The brothers made small rolls of toilet paper that were designed to fit in these new bathrooms. What is the passage mostly about? A. the history of toilet paper B. Clarence and Edward Scott C. the history of indoor bathrooms D. the power of good advertising im failing english with a 11*STRESS* the physical appirence of the astrologer hardly created an impect on the customers Mrs. Gurung spends 75% of her income every month which amounts to Rs 9000 and the rest she saves in a bank What is the value of y ? A bathtub can hold 66 galons of water. The faucet adds 5.5 gallons of water to the bathtub evvery minute. Find out how many minutes it takes to fill the empty bathtub. what is the minimum effort required to raise the block? helppppppppppppppppppppppppp list at least 3 theorems and give an example for each. PLEASE HELP ME!!!No links ,answers only!!! Two lines, C and D, are represented by the equations given below:Line C: y = x + 14Line D: y = 3x + 2Which of the following shows the solution to the system of equations and explains why? (5 points) a(6, 20), because both lines pass through this point b(6, 20), because the point does not lie on any axis c(3, 11), because one of the lines passes through this point d(3, 11), because the point lies between the two axes Lacey and Rita are adding books to their class libraries. Laceys classroom started out with 14 books and she plans to but 2 more books per week. Rita started out with 22 books, and she has enough money in her budget to purchase one book per week. At some point, the teachers will have the same amount of books. Which week will have the same number of books and how many books will each class have? Can someone PLEASE HELP FOR 15 POINTS! (Classify each pair of angles listed below as adjacent or vertical) Pls help me , I ll give u the brainliest which quadertiral makes this statement true Which human organ system eliminates liquid and gaseous wastes from the body?(1) circulatory (2) endocrine (3) excretory 4) reproductive Fill in the correct definite article for each noun below. 1.______ bolgrafo 2. _____ mesa 3.______ bolsa 4. ____ computadora 5 ____ ventana 8. ______ cuaderno 9. _____ tiza 10. _____ telfono Write the plural for the nouns below 11. La cama 12. El pupitre 13. La foto 14. La silla 15. El libro 16. El carro 17. La oficina 18. La edad 19. La pared 20. La hermana g Sardar has two old rich aunts, Betty and Gwenda. Assume they will both die before he does. For each aunt, Sardar thinks the chance that she will leave him some money if she dies first is 1/3. But Sardar thinks that if Gwenda dies first, the chance that Betty will leave him money is only 1/4, and if Betty dies first, the chance Gwenda will leave him money is also 1/4. What is the probability that he will inherit at least some money by the time they both die European nations were sure _______________________.they would lose the warthe war would be shortthe war would be longtheir leaders would not support them in the war Ms. Day gave a test to her four math classes. There are 25 students in each class. There were 8 As in her first class, 9 As in her second, 10 As in her third, and 7 As in her fourth class. If there are 150 students in the grade, which of the following is the BEST prediction of how many students will earn an A on this math test?