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stealth61 [152]
3 years ago
13

Chemicals that send instructions to cells are

Biology
1 answer:
adoni [48]3 years ago
7 0
The nucleus i would say it controls all your cells and hen membrane

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The spermatic cord contains the: a. ​vas deferens. b. ​seminal vesicles. c. ​prostate gland. d. ​Cowper's glands.
77julia77 [94]

Answer:  a. ​vas deferens

Explanation:

The spermatic cord refers to the cord or tube which is supplied with the collection of the nerves, ducts and vessels that run to the testes or from the testes. These are surrounded by the fascia.

The spermatic cord contains the testicular artery, plexus veins and vas deferens. The other structures of the cord includes the cremasteric artery, sympathetic nerves and lymphatic supply from the epididymis and testis.

7 0
3 years ago
What kind of mutation repair does not involve the removing and repairing of nucleotides?
Pavel [41]

Direct repair is mutation repair that does NOT involve the removing and repairing of nucleotides

A mutation in biology is an adjustment to the nucleic acid sequence of an organism's, virus's, or extrachromosomal DNA. DNA or RNA can be found in the viral genome. Since mutation results in a new DNA sequence for a particular gene, resulting in a new allele, it is crucial as the initial stage of evolution. Through intragenic recombination, recombination can also produce a new DNA sequence (a new allele) for a particular gene.

DNA proofreading and repair systems often identify mutations and mutation repair. The cell will also go through programmed cell death (apoptosis), which prevents the flawed DNA from being passed on if the damage cannot be repaired. Only when these systems are compromised do mutations take place and are transmitted to daughter cells.

What kind of mutation repair does NOT involve the removing and repairing of nucleotides?

a. mismatch repair

b. base-excision repair

c. direct repair

d. None of the above, because all repair involves the removing of mutated nucleotides.

To know more about mutation refer to: brainly.com/question/7488281

#SPJ1

4 0
2 years ago
A human cell containing 22 autosomes and a Y chromosome is
murzikaleks [220]

The correct answer is A. A sperm

Explanation:

Sperms are a type of reproductive cells that are essential for sexual reproduction. Sperms are male reproductive cells different from eggs that are female cells. Additionally, these can have flagella that allow them to move to reach the egg or be non-motile. In the case of human sperms, these have a flagella and also they contain 23 chromosomes; additionally, in this there is 1 allosome chromosome that defines sex and in males and therefore sperms can be either X or and 22 autosomes that refer to chromosomes not related to sex, this is also particular from sperms as eggs in humans can only have an X allosome. According to this, it is a sperm the cell that contains 22 autosomes and a Y chromosome.

8 0
3 years ago
Spider silk is a material made of proteins that has a strength per gram that is five times that of steel. One feature of some of
stepan [7]

Answer:

glutamic acid, because the R group could form ionic bonds

arginine, because the R group could form ionic bonds

tryptophan and tyrosine, because the R groups are small, allowing close stacking

glycine and alanine, because the R groups are small, allowing close stacking

6 0
3 years ago
Alicia cashed her paycheck and used half her earnings to take three friends to dinner. She spent $42.15 on dinner and she brough
Ede4ka [16]
If she spent $42.15 on dinner it does not matter that this is half.
The equation should be: x-42.15\geq20
I hope that this is the answer that you are looking for.
6 0
3 years ago
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