BIOLOGY HIGH SCHOOL

What are the four reasons that natural selection occurs?

Answers

Answer 1
Answer:

The four reasons are

1) There is an over population.

2) There is a genetic variation in certain offspring that is helpful to survival.

3) The species struggle for survival.

4) The ones that lives will reproduce and pass on their genetic variation.


I hope that's help:0

Related Questions

Anaerobic photoautotrophs were the first organisms to release oxygen into the early atmosphere.True False
1. A(n) _____ shows you the schedule of payments on a loan and the total interest and payments at the end of the loan. A. payoff table B. amortization table C. payment table D. interest table 2. Secured debts must have _____. A. collateral B. real property C. low interest rates D. certified lenders 3. Using the table, where does the smallest change in interest rates between secured and unsecured occur? A. Secured B. Unsecured C. Credit D. APR APR 4.75% 5.50% Good 5.00% 5.90% Average 5.85% 6.75% Fair 6.40% 7.25% Poor 7.50% 8.40% at the excellent rating A. at the good rating B. at the average rating C. at the fair rating 4. You are purchasing a car for $12,985.00 with the help of your parents. How much interest is saved in the first month by you using their good credit rating compared to your fair credit rating, using the table above? Review Guidelines: (12985) * (0.014) * 1/12 = 15.14916666 = $15.15 A. $14.61 B. $54.10 C. $15.15 D. $69.25
What is the ultimate goal/purpose of mitosis ? What term do we use to describe the new cells ?
Fats are broken into saturated fats and unsaturated fats. Which of these explains the difference between saturated and unsaturated fats?A) Saturated fats have no hydrogen in the molecule. B) Saturated fats have more carbon atoms than unsaturated fats. Eliminate C) Saturated fats have only single bonds on all the carbon atoms. D) Saturated fats have only double and triple bonds on the carbon atoms.
The leading cause of limited water supplies is _______. a. low precipitation b. overuse c. limiting use d. government

Gymnosperm seeds are usually carried bya. wind
c. animals
b. water
d. all of the above

Answers

Gymnosperm seeds usually contain embryos which can be carried by water, wind and or animals. Eventually, these seeds will germinate in different environment. In this case, the answer would be d. all of the above which include the 3 answers.

Answer: It is D all of the above.

Why do arteries need to be thick, muscular, and elastic? to make our bodies strong for movement

to withstand the pressure of the blood that is being pumped by the heart

to pull the blood back to the heart from all areas of the body

to withstand changes in blood temperature

Answers

Arteries need to be thick, muscular and elastic IN ORDER TO WITHSTAND THE PRESSURE OF THE BLOOD THAT IS BEING PUMPED BY THE HEART.

The walls of the arteries are thicker and more muscular than that of veins because of the work that they perform. The arteries have thick and muscular walls, which help them to withstand and absorb the pressure waves that are generated as a result of blood pumping from the heart. The elasticity of the arteries help them to generate appropriate pressure for supporting blood flow.

The answer is to withstand the pressure of the blood that is being pumped from the heart, because the pressure can change based on activity levels.

What type of consumer is a ladybug?A. decomposer
B. primary consumer
C. secondary consumer
D. tertiary consumer

Answers

The correct option is C.
Secondary consumers are those consumers who feed on primary consumers. Ladybug feed on soft bodied insects such as aphids. Aphids are pest and they feed on the crops which farmers planted, ladybug in turn feed on these aphids.

Answer;

C. secondary consumer

Explanation;

-Secondary consumers are largely comprised of carnivores that feed on the primary consumers or herbivores

-A ladybug is a secondary consumer. It eats plants and small insects that destroy plants. The small insects that it eats include aphids, which makes ladybugs good for the garden. Ladybugs, in turn, are eaten by other animals such as frogs.

if several pea plants with the genotype TTYy are crossed with pea plants with the genotype Ttyy what percentage of the offspring will be expected to have the TTYy allele combination

Answers

The percentage of the offspring that will be expected to have the TTYy allele combination is 25%.

What is punnet square?

A cross or breeding experiment's genotypes can be predicted using the Punnett square, a diagram with squares. This square bears Reginald C. Punnett's name, who created this invention in 1905.

Two heterozygous plant crosses will result:

  T         T                        Y         y

T   TT     TT                   y   Yy     yy

t    Tt       Tt                   y   Yy      yy

The ratio of TT =   1/2     The ratio of Yy =  1/2

The total ratio of TTYy is 1/2 x 1/2 = 1/4 = 25%.

Therefore, 25% of the progeny should carry the TTYy allele combination, according to expectations. The offspring produced is heterozygous.

To learn more about punnet square, refer to the link:

brainly.com/question/3871976

#SPJ12

Answer:

1/4 in fraction and 25% in percentage

Explanation:

Gametophytes are
A. gametes.
B. zygotes.
C. haploid.
D. diploid.

Answers

a . gametes 
thank you so much 

Gametophytes are considered as C.) Haploid

Choose the definition of: InvertebratesA. Having no backbone
B. have a backbone
C. having several backbones
D. having lost a backbone

Answers

The correct option is (a) having no backbone.

Invertebrates are the category of organisms that lack backbone. They have some soft tissues and because of this their body is soft as compared to that of vertebrates. Example: jellyfish and sponges. Some of the invertebrates have outer covering which is very hard called as exoskeleton. This helps them to protect from outer injuries and harsh conditions. Example: cockroach, spiders, etc.
without backbone or having no backbone is considered as INVERTEBRATES.

hope its help...

--kcirejay:♥)
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