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natulia [17]
3 years ago
14

Human blood type is determined by several alleles: A, B, and O. This is an example of what?

Biology
2 answers:
galina1969 [7]3 years ago
4 0
A) there are multiple alleles that creat different outcomes
UkoKoshka [18]3 years ago
3 0

Answer:

A

Explanation:

The choice is related to alleles. It is A.

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How are things transported through the membrane
AlladinOne [14]

Answer:

The mechanisms of transport across the cell membrane are as follow: 1- simple diffusion, 2- facilitated diffusion, 3- primary active transport and 4-secondary active transport

Explanation:

The cell membrane is a selectively permeable structure capable of transporting substances by different mechanisms. Simple diffusion is a type of passive transport (i.e. does not require energy) where non-polar molecules (e.g. O2, CO2) pass across the membrane by a process that does not require energy from the cell. Facilitated diffusion is another type of passive transport where larger polar molecules (e.g., glucose and amino acids) pass across the membrane by using specific transmembrane integral proteins. On the other hand, primary active transport is a type of active transport that uses chemical energy (e.g., ATP) to move substances such as metal ions (Na+, K+, Ca2+) across the cell membrane against their concentration gradient. Finally, secondary active transport is another type of active transport where transporter proteins are used to couple the movement of ions (e.g., H+ protons) down their electrochemical gradient to the transport of another ions/solutes against their concentration/ electrochemical gradient.

6 0
3 years ago
The body has and maintains homeostasis through the working together of 11 of
irinina [24]

Answer:D

Explanation:Because I got it right

3 0
2 years ago
What structure are only found in eukaryotes
Aleks [24]

A eukaryotic cell has a nucleus as well as membrane bound organelles such as the golgi apparatus, endoplasmic reticulum ect.

5 0
3 years ago
Pls help<br>will give the brainliest<br>please answer correctly.​
motikmotik

Answer:

A=Cornea

B=Retina(rods and cones)

C=Sclerotic

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4 0
3 years ago
Read 2 more answers
What is the correct term for variation in characteristics within populations of the same species? A variation in characteristics
Crazy boy [7]

Answer:

The correct answer would be phenotypic variation.

Phenotype refers to observable traits or characteristics of an individual. For example, height, color, shape, et cetera.

Phenotypic variation refers to the sum total of variations in characteristics within populations of the same species.

In contrast, genotypic variation refers to the sum total of variations (such as allele frequency) present in the genome of populations of the same species.

5 0
2 years ago
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