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Sav [38]
2 years ago
14

A scientist looked at a sample of fresh blood under a microscope. She produced the following drawings of what she saw. Give two

ways in which white blood cells destroy disease-causing micro-organisms
Biology
1 answer:
Sergeu [11.5K]2 years ago
7 0
1) The antibodies destroy the antigen (pathogen) which is then swallowed and digested by macrophages.
2) White blood cells can produce antitoxins which destroy the toxins that are otherwise known as poison.
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Dr. stevens is examining the dna sequences of a group of mice. he notices that in one of the mice, one nucleotide pair is substi
serious [3.7K]

Out of the following given choices;

<span>A.      </span>The mouse has a completely different DNA sequence than the other mice.

<span>B.      </span> The substituted nucleotide has the same directions as the original nucleotide.

<span>C.      </span>Substitutions in the nucleotides of a mouse's DNA never affect their phenotypes.

<span>D.      </span>DNA sequences don't determine the color of a mouse's fur.

The answer is B. Most probably, the nucleotide substitution did not translate to a change in the amino acid sequence in the translated protein. As you may be aware, most amino acids are coded by more than one codon. For example, Leucine is coded for by CTT, CTC, CTA, CTG, TTA, TTG. Therefore, a substitution, that causes a change to either one of the sequences will not change the amino acid.






7 0
3 years ago
Which is the best example of competition in a forest ecosystem?
Mrac [35]
D) Blue Jays and Finches nest in the same Oak Trees.

Explanation:

This is an example of competition because two species are for the same thing, in this case, oak trees to nest in.
3 0
3 years ago
Explain why metabolism in eukaryotic cells depends on the endoplasmic
andrew-mc [135]

Explanation:

Metabolism in eukaryotic cells depends on the endoplasmic reticulum because it transports materials between membrane-bounded organelles within the cell.

8 0
3 years ago
1.Identifying characteristics of bacteria include _____.
katen-ka-za [31]
The best and most correct answer among the choices provided by the question is the fourth choice "all of the above."


<span>Bacteria vary from species to species, thus assigning many common traits to bacteria is difficult. Bacterialspecies are typified by their diversity. There are three notable common traits of bacteria, 1) lack of membrane-bound organelles, 2) unicellular and 3) small (usually microscopic) size.</span>
I hope my answer has come to your help. God bless and have a nice day ahead!
4 0
3 years ago
Read 2 more answers
The Brahman cattle have good resistance to high temperature, but its meat is poor and tough to eat. The English shorthorn cattle
choli [55]
<span>selective breeding </span>because people are breeding new things.

7 0
3 years ago
Read 2 more answers
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