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Cerrena [4.2K]
3 years ago
12

What are the free sites to learn biology for grade 8?

Biology
2 answers:
Ganezh [65]3 years ago
8 0
U can download khan academy :D
julsineya [31]3 years ago
6 0

Answer:

CK12, bioninja, and amoeba sisters on yt

Explanation:

They are really helful!!

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Which of the following are characteristics of prokaryotes? Select all that apply.
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In some chickens, the gene for feather color is controlled by codominance. The allele for black is B and the allele for white is
Agata [3.3K]

Answer:

The question is incomplete, it lacks the main questions, those questions are:

a. What is the genotype for black chickens?

b. What is the genotype for white chickens?

c. What is the genotype for erminette chickens?

Explanation:

This question involves a gene coding for feather colour in some birds, in which the black allele (B) and white allele (W) is involved. According to the question, the gene coding for feather colour exhibits co-dominance i.e. both the black (B) and white (W) allele are expressed in a heterozygous state (BW) to form an erminette phenotype.

Hence, if the neither alleles is dominant or recessive over the other. The black phenotype will only be expressed when the genotype is BB.

The white phenotype will only be expressed when the genotype is WW

The combination of both alleles which results in the simultaneous expression of both in the erminette phenotype, will be BW genotype.

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3 years ago
Please help ASAP<br> Will give brainliest
Bezzdna [24]
<h3>B. contraction of muscles.</h3>

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Where would you find hemoglobin that is about 65% saturated with o2 in a healthy resting person?
liberstina [14]

The hemoglobin that is about 65% saturated with o2 in a healthy resting person Systemic veins & pulmonary arteries.

<h3>Define Hemoglobin?</h3>

Hemoglobin is a protein in red blood cells that takes oxygen to body's organs and tissues and elates carbon dioxide from organs and tissues back to your lungs.

Thus, Systemic veins & pulmonary arteries are correct.

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brainly.com/question/15011428

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