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
vichka [17]
3 years ago
9

What is the most important mechanism through which combined oral contraceptives prevent pregnancy?

Biology
1 answer:
irakobra [83]3 years ago
6 0
I got a good call today and I’m just waiting for
You might be interested in
What is a control value?
Inga [223]

Answer:

The value of control is a quantitative measure of the value of controlling the outcome of an uncertain variable. Decision analysis provides a means for calculating the value of both perfect and imperfect control. The former value, informally known as the value of wizardry, is an upper bound for the latter. Obtaining meaningful value-of-control measurements requires an awareness of important restrictions (concerning the nature of free will and the meaning of counterfactual statements) on the validity of this kind of analysis.

5 0
3 years ago
Read 2 more answers
Label the features of the stomach and nearby regions in this frontal section of a cadaver (anterior view)
Fantom [35]
1- Pyloric sphincter
2-Duodenum
3- Bile duct
4-Pancreatic duct
5-Esophagus
6-Lower esophageal sphincter
7-Fundus of stomach
8- Cardia
9-Body of stomach
10-Pyloric part

The <span>esophagus(5) connects to the stomach.</span>
<span> The food passes,from the pharynx, to the esophagus, to the stomach. This process is aided by peristaltic movements done by esophagus muscles.
This organ contains two sphincters:</span><span>the upper and the lower esophageal sphincter.
 
</span>The stomach is divided into four parts:
<span><span>1-The cardia (8) - this part is connected to  the esophagus and its where  the epithelium changes from stratified squamous to columnar.
In this region is the lower esophageal sphincter (6).

</span>2--The fundus(7)- It's formed by the upper curvature of the stomach.

3- the body(9)- is the main part; and the biggest

4-The pylorus/</span><span> Pyloric part (10) - is the lower region. This part is connected to the small intestine, the duodenum. In this region there is a </span>
strong ring of muscle called the (<span>1) Pyloric sphincter.


In the first part of the duodenum there is a connection with a duct that comes from the pancreas -4-</span>Pancreatic duct .
There is another duct that ends in the duodenum called- <span>Bile duct, that caries bile to digest fats.</span>
8 0
3 years ago
What is the pH if 20 mL of pH = 2 solution is diluted to a final volume of 600 mL?
Mashutka [201]

Explanation:

Hydrogen atoms contain 1 proton and 1 electron while being devoid of neutrons. When they lose their electron they form an ion or H+, a particle carrying a unit of positive charge.  pH measures how basic or acidic a water-based solutions are, with a formula for pH is

pH = -log[H+].

...where pH is -base 10 log of the concentration of hydrogen ions within the solution.

Initial volume= 20 mL

Final volume= 600 mL

# of dilutions= \frac{600}{20} = 30

for a pH 2= [H+]= 10^{=2}

∴ [H+]=  \frac{10^{-2}}{30} = 3.333 * 10^{-4}

and pH is an antilog of [H+]= - log \frac{10^{-2}}{30} = 3.333 * 10^{-4}

∴pH = 3.47

Learn more about pH at brainly.com/question/4981491

Learn more about pKA at brainly.com/question/11062486

#LearnWithBrainly

7 0
3 years ago
What evolutionary advantage does a eukaryotic cell have compared with a prokaryotic cell?
Luden [163]

Answer:

Prokayotes may be defined as the organisms that lacks the nucleus and the membrane bound cell organelle. Eukaryotes have the well defined nucleus and contains the membrane bound cell organelle.

The evolutionary advantage that has been noticed in the eukaryotic cells is the compartmentalization of the cell. The cell compartmentalization separates the cell organelle into the specialized functions. This division of labor increases the efficiency of the cell and regulates the evolution of the complex multi cellular organism.

7 0
3 years ago
Which of the following statements about energy resource availability is true?
Illusion [34]
C. The exact amount of nonrenewable energy resources is not currently known. 
7 0
3 years ago
Read 2 more answers
Other questions:
  • What are the three types of homologies and the definitions?
    6·1 answer
  • The enlargement of the somatosensory area for dominant fingers in violin players is an example of the effects of __________ on b
    5·2 answers
  • A registered nurse teaches a nursing student about the physiologic changes that occur during pregnancy and their impact on drug
    9·1 answer
  • Review the water cycle diagram below. What would be the effect on the mountains if the ocean were not nearby?
    9·1 answer
  • Consider a situation in which the enzyme is operating at optimum temperature and pH, and has been saturated with substrate. What
    10·1 answer
  • Answers
    10·1 answer
  • The carrier of the hereditary character in plants and animal is the
    8·1 answer
  • If you have a cell with more salt outside the cell, then inside the cell what will happen to the cell?
    10·1 answer
  • infected mosquitoes landed on socks three times more often than uninfected mosquitoes. Explain how this information can be used
    15·1 answer
  • Help pleaseee. Daniel reads about the survival and reproductive strategies of animals. He is surprised at the complexity of beha
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!