BIOLOGY HIGH SCHOOL

You would expect to find ________ in an ecosystem.only abiotic factors
only biotic factors
biotic and abiotic factors
all the exotic factors

Answers

Answer 1
Answer: It should be C., as an ecosystem has both biotic and abiotic factors.

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Impala share the African plains with other grazing animals and predators. Which change would lead to a DECREASE in the impala population

Answers

Increase in predator population, food scarcity, water scarcity, lack of space, etc.

What is the correct order of geological time scales from largest to smallest?

Answers

Answer:

This hierarchy comprises eons, eras, periods, epochs, and ages from the largest to the smallest

Explanation:

This hierarchy comprises eons, eras, periods, epochs, and ages from the largest to the smallest. All of these are shown in the geological time scale page.

Eon                      Era          Period            Epoch           Age

Phanerozoic Cenozoic Paleogene Oligocene Chattian  Rupelian

The Phanerozoic Eon reflects the period that most macroscopic species — bacteria, fungi, plants, and animals — lived through.

What processes transforms water vapor to liquid water

Answers

Condensation is the process that transforms water vapor into liquid water.

A woman who has blood type A positive has a daughter who is type O positive and a son who is type B negative. Rh positive is a trait that shows simple dominance over Rh negative and is designated by the alleles R and r, respectively. A third gene for the MN blood group has codominant alleles M and N. Which of the following is a possible phenotype for the father?
A) A negative
B) O negative
C) B positive
D) AB negative
E) impossible to determine

Answers

The answer is C) B positive.

A mother has either AA or AO genotype. Since her daughter has OO genotype, the one O allele is from a father and one is from the mother.  Thus, mother must have allele O. So mother's genotype is AO.

A mother with AO genotype will pass to her son either A or O allele. Since son is type B negative, it could inherit from mother only O allele. Son's genotype is BO. This means that he inherited from the father B allele.

Father has either BO or BB genotype. Since his daughter has OO genotype, she must inherit one O allele from the father. Thus, the father has BO genotype.

Talking of Rh, her son is type B negative. A negative Rh phenotype contains both recessive alleles r, so the mother must have allele r (she is either Rh+ heterozygous, or Rh- homozygous). The same is with father - he  is either Rh+ heterozygous, or Rh- homozygous.

Most of the substances around us are _____.A. pure elements

B. compounds

C. free atoms

Answers

Answer:

compounds

Explanation:

i just did this test and said it was compounds

Answer: A

Explanation: Pure element because compound for is something that disslove with another compound to form another cycle

for example a cake

and free atoms is........well i not really sure. but i do know pure elements is the answer because sugar, and other things are what weeeeeeee

How does ocean expansion occur?

Answers

Answer:

Sea level rise

Explanation:
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