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erastovalidia [21]
3 years ago
14

What day is considered to be the first day of a female’s reproductive cycle?

Biology
1 answer:
san4es73 [151]3 years ago
8 0

Answer:

This is usually the first day of menstruation - the day when the uterus lining starts to be shed.

Explanation:

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Help weed this question pls
erik [133]

Answer:

.92 A = Is

Explanation:

Is = \frac{Vp *Ip }{Vs}

We're solving for Is, so plug in all the other given numbers.

Vp = 230 V

Ip = .020 A

Vs = 5.0 V

Is = \frac{230 * .020}{5.0}

   = .92 A

4 0
3 years ago
Which element has one valence electron and six energy levels?
Vadim26 [7]

There is no element with one valence electron and six energy levels. Only two valence electrons and six energy levels.

Answer:

Calcium

Explanation:

A: Calcium is a group 2 element with two valence electrons. Therefore, it is very reactive and gives up electrons in chemical reactions. It is likely to react with an element with six valence electrons that “wants” to gain two electrons. This would be an element in group 6, such as oxygen.

7 0
3 years ago
Describe three properties of mitochondria and chloroplasts that support the endosymbiotic theory. Be sure to explain your answer
gtnhenbr [62]
Endosymbiotic theory is a theory of evolution that eukaryotes came from prokaryotes. Mitochondria and chloroplasts both have the double membranes. Each of them also contain genetic material that are replicated with a separate cell cycle. Both organelles have their own ribosomes.
3 0
3 years ago
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Describe two examples of how an understanding of genetics is making new fields of health care(treatment or diagnosis)possible?
WARRIOR [948]

Answer:

Genetics is a branch of science that deals with the study of genes, their sequence, function, variation, and heredity.

Increasing understanding of genetics help in making new fields of health care, for example,  

  • Gene therapy helps in treating various genetic diseases such as cystic fibrosis et cetera.
  • Molecular genetics help in the development of more precise methods for diagnosis such as ELISA.
  • Pedigree analysis and karyotypes help in early detection of possible hereditary diseases.
  • DNA fingerprinting helps in detecting criminal suspects, paternity test, identification of dead organism et cetera.
4 0
3 years ago
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Please help, I’ll give brainliest!
VladimirAG [237]
The answer is nucleus (structure A)

because nucleus DNA would be destroyed
4 0
3 years ago
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