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lana66690 [7]
3 years ago
12

Why is progesterone production in the corpus luteum important in the first trimester of pregnancy?

Biology
1 answer:
Contact [7]3 years ago
5 0

Answer:

a. To maintain the uterine lining

Explanation:

Progesterone is secreted by the cells of the corpus luteum. During the uterine cycle, it prepares the uterine endometrium for implantation. During the first trimester, progesterone maintains the uterine lining. Higher levels of progesterone inhibit the secretion of GnRH (gonadotropin-releasing hormone). This results in inhibition of the secretions of FSH and LH which in turn are required for the development of follicle and ovulation respectively.

Lower levels of progesterone during pregnancy results in sloughing off of uterine lining and the embryo during menstruation causing abortion.  

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One way to determine the density of animals in an area is to use the mark-recapture technique. A number of individuals from a po
NNADVOKAT [17]

Answer:

N = 187.55

Explanation:

Here you just need to replace the terms and clear the equation.

You already know that,

  • First capture: 25 prairie dogs.
  • First marked animals: 25 (the whole first capture)

You let these animals leave and then you made another capture.

  • Second capture: 135 prairie dogs
  • Already Marked animals: 18 (these 18 dogs were caught in the first capture and marked before releasing them)  

To know the size of the prairie dogs population you just need to use the following equation and clear N, which is the value that you are looking for.  

Number of individual marked in first catch/Total population size, N = Number of individual marked in 2nd catch / Total number of 2nd catch

  • Number of individual marked in first catch = 25 dogs
  • Total population size, N = this is what we want to know
  • Number of individual marked in 2nd catch = 18 dogs
  • Total number of 2nd catch = 135 dogs

So now, we need to replace terms

25 / N = 18 / 135

25 / N = 0.1333

N = 25 / 0.1333

N = 187.55

4 0
3 years ago
Which biome has trees that shed their leaves as part of its climax flora?
vesna_86 [32]
I'm gonna say D is the answer.
6 0
3 years ago
Read 2 more answers
The first person generally credited with fulfilling the functions of the modern director was:
arsen [322]

The first person generally credited with fulfilling the functions of the modern director was George, Duke of Saxe- Meiningen. Meiningen was a wealthy aristocrat and head of a small German principality. In 1826, George, Duke of Saxe- Meiningen and his morganatic wife started an experimental acting group which was one of the first companies in which the importance of the director was stressed.






7 0
3 years ago
15 meters is how long in a foot?
malfutka [58]

45 feet

there are 3 feet in a meter

so we can find how many feet are in 15 meters by multiplying

15 x 3 = 45

8 0
3 years ago
Read 2 more answers
A goal of using animal models is to explain the molecular detail of specific behaviors encoded in the human brain. How would you
oksian1 [2.3K]

Answer:

It is possible to compare the expression of homologous genes in the brain of <em>D. melanoganster</em> and humans, because the expression levels of conserved genes may be associated with the evolution of cognitive features such as complex learning and memory.  

Explanation:

Model organisms can be used to understand the patterns and processes that affect human evolution. <em>Drosophila melanogaster </em>is a model organism that has been used to study expression patterns of conserved genes in the course of evolution. This model organism has also been used to develop genetic mutant lines in order to examine the role of genes evolutionarily conserved in animals, including those involved in neurocognitive development.

In genetic research, an experiment as the above described is framed in a research field named 'Behavioral Genetics', which is a discipline that studies how evolutionarily conserved gene networks may be associated with neurocognitive tasks during brain evolution.

7 0
3 years ago
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