1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
BaLLatris [955]
2 years ago
6

Where does the estrogen that helps maintain the pregnancy come from?

Biology
1 answer:
Mnenie [13.5K]2 years ago
8 0
What is do it enot is I just don’t ewant
You might be interested in
Where are rain gauges located?
Ymorist [56]

The rain gauge is an instrument used by meteorologists to measure the amount of precipitation in a particular region in a particular amount of time.  

The rain gauge is placed on the ground in order to collect the rain or the precipitation sample. The rain gauge is labelled with the quantities, which can be used to measure the amount of precipitation.

So, the correct answer is option (a). on or near the ground.


4 0
3 years ago
Read 2 more answers
Why do religious people refuse to except the theory of evolution?
zloy xaker [14]

Answer:

because they are set on their beliefs and on how the way the world should be and or act based on their religious book (bible) teachings

Explanation:

7 0
3 years ago
Read 2 more answers
Which of the following statements about natural selection is true?A. Natural selection is a process whereby genes are selected r
AlekseyPX

Answer:

C. Natural selection favors individuals that reproduce more than others.

Explanation:

Genetic variations present in the population are acted upon by natural selection. The organisms that have the adaptive traits which in turn make them able to survive and reproduce more than the other individuals are favored by natural selection.

Over generations, natural selection leads to the evolution of a new population with an increased frequency of the gene responsible for the selected adaptive trait.  

For example, the bacteria with antibiotic resistance were favored by natural selection as they can survive and produce more progeny in the presence of antibiotics than the bacteria lacking the gene for antibiotic resistance.  

8 0
3 years ago
Why do some offspring look like their parents, while others do not?
castortr0y [4]
Some offsprings look like their parents because we all have different genes. Different combinations of genes for one of these traits create a bunch of different physical attributes. Even though we get all our DNA from our parents, each of us has a unique combination of genes.
3 0
3 years ago
At one time, membrane biologists thought that transport proteins might act by binding a solute molecule or ion on one side of th
Ivahew [28]

Answer:

The process of passage of different molecules, solutes, and liquids, through the phospholipid bilayer in human cells, and really in all animal cells, is highly dependent on a tight coordination between chemical, and thermodynamic balances, that will collaborate in these elements being able to pass, or not pass, through a cell´s membrane, and activate other mechanisms within the cell when their passage is not possible. Unlike what was once believed, that transport proteins were like buses parked at the membrane and waiting to be loaded with molecules to later remove themselves from the membrane and carry their load into the cytoplasm, scientific research has found that this is definitely so, and that transport proteins do not come off the layer to transport  molecules. They are permanently anchored to the membrane and through a series of second messenger systems, energy produced by the passage of certain ions like potassium and sodium, and other such processes, these transport proteins become activated, allow the passage of molecules and change them in such a way that they can be taken into the cell in vesicles, or, they will anchor them to second messengers, who will be responsible for carrying the molecule inside.

From the list of words given and the two sentences down below, which are two reasons why the earlier believed models for transport proteins are not correct would be:

1. Integral membrane proteins are embedded stably in the membrane and protrude from one or both side based on their hydrophobic, or hydrophilic, regions. These sides will not switch because of the disbalance that would be created if the two sides had to be switched chemically to allow them to pass to the opposie sides.

2. For protein to traverse a membrane, movement of its hydrophilic regions through the interior of the membrane would be required, which would be highly endergonic and hence thermodynamically improbable.

5 0
3 years ago
Other questions:
  • Explain why the forest ecosystem is a system. Use examples from the article to support your explanation.
    14·2 answers
  • PLEASE HELP(85 points!)
    6·1 answer
  • Design an experiment from the following hypothesis....
    9·1 answer
  • Which is not true of lipids
    5·2 answers
  • What do you mean by hypometrophia?​
    6·2 answers
  • Which organelle stores the information that determines an individual's hair 1 point
    10·1 answer
  • what process allows plants to convert sunlight energy into chemical energy
    5·1 answer
  • Fmri scans have allowed us to make great advances in our understand of the roles of different regions of the brain. Suggest why
    7·1 answer
  • Principle of urease test​
    11·1 answer
  • Plastic does not_____heat​
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!