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MArishka [77]
3 years ago
11

The purpose of the menstrual cycle is to _____.

Biology
2 answers:
sergiy2304 [10]3 years ago
5 0

Answer:

The answer is expel an unfertilized egg and endometrium

Explanation:

The menstrual cycle consists of a series of regular changes that naturally occur in the female reproductive system which make pregnancy or menstruation possible. During the first phase of the menstrual cycle, the endometrium is released along with an amount of blood, this bleeding is a sign that a woman is not pregnant.

lesya692 [45]3 years ago
4 0
Expel an unfertilized egg and endometrium.
That's what it's for, it basically flushes the not needed stuff out of a woman's uterus. 

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Which of these is an example of a haploid cell?
zavuch27 [327]

Answer:

Gametes

Explanation:

Gametes are an example of a haploid cell and are produced as a result of meiosis.

7 0
3 years ago
Compare the two processes: mitosis and meiosis. Can you identify the the true statements about the two? Meiosis results in four
Alborosie

Answer:

The correct statements are:

  • Meiosis results in four haploid daughter cells.  
  • During meiosis, the 2N mother cells produce N daughter cells.  
  • In both processes, DNA replication must occur.  
  • Mitosis is responsible for genetic continuity; in higher organisms, it is essential for growth and repair.  

Mitosis is a type of cell division in which a parent cell is divided into two identical daughter cells. Each daughter cell contains identical genetic material as that of the parent cell.  

It plays important role in growth and repair of cells and tissues in multi-cellular organisms.

Meiosis is a type of cell division in which a parent cell is divided to produce four daughter cells. Each daughter cell contains exactly half the genetic material (chromosomes) as that of parent cells

It plays important role in the production of gametes (eggs and sperms) in sexually reproducing organisms.

Before either cell division, the DNA is replicated in the S or synthesis phase of the cell cycle.

5 0
3 years ago
Choose all the answers that apply.
Maurinko [17]

Answer:

is made of cellulose

Explanation:

omly plant cells have it

3 0
3 years ago
Read 2 more answers
Which of the following statements correctly describes some aspect of ATP hydrolysis being used to drive the active transport of
saw5 [17]

Answer:

B) This is an example of energy coupling

Explanation:

Energy coupling is a process by which cells carry out thermodynamically unfavorable, endergonic (energy-requiring) reactions to other exergonic (reactions that liberate free energy) reactions.

Reactions which are endergonic do not occur spontaneously as they result in a decrease in entropy and a positive free energy change, ∆G.

Exergonic reactions occur spontaneously as they result in an increase in entropy and have a negative free energy change, ∆G.

For example, the active transport of ions against their concentration gradients in cells is a non-spontaneous endergonic process which is coupled to the hydrolysis of ATP, an exergonic process in other for the reaction to proceed. ATP hydrolysis phosphorylates an amino acid side chain in the transport protein which then drives the forward process of transport of the ion.

Considering the above,

Option A: The hydrolysis of ATP is endergonic, and the active transport is exergonic is false because ATP hydrolysis is exergonic while active transport is endergonic.

Option B: This is an example of energy coupling is true.

Option C: Both ATP hydrolysis and active transport are spontaneous because they result in an increase in entropy of the system is false because only ATP hydrolysis is spontaneous

Option D: Neither ATP hydrolysis nor active transport is spontaneous is false because ATP hydrolysis is spontaneous.

Option E: ATP is acting as a transport protein to facilitate the movement of the ion across the plasma membrane is false because ATP is not a protein, rather it serves to activate the transport protein by phosphorylating it.

8 0
3 years ago
Select all that apply. Which of the following are current human uses for chordates? food research therapy entertainment affectio
topjm [15]
Chordates are animals that possess certain characteristics including a notochord. Humans fall into this category along with many vertebrates such as whales, falcons etc; therefore, all of the answers apply.
Food, research, therapy, entertainment affection.
8 0
3 years ago
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