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
tatyana61 [14]
2 years ago
12

During the systole phase of the cardiac cycle, the left ventricle contracts and blood is pumped into the aorta. Which of these v

alves prevents a backflow of blood into the left atrium?
Biology
1 answer:
Morgarella [4.7K]2 years ago
4 0
The two semilunar valves, the pulmonary and aortic valves, are closed, preventing backflow of blood into the right and left ventricles from the pulmonary trunk on the right and the aorta on the left.
You might be interested in
Which is an abiotic factor that characterizes the taiga biome?
Oksana_A [137]
I think I’ll go with C. long dry cold winters
5 0
3 years ago
Read 2 more answers
Use the scenario to answer the question.
Murljashka [212]

Answer:

fruit weight

Explanation:

In an experiment, the dependent variable is the variable that responds to the changes made to the independent variable. In other words, the dependent variable, as the name implies, is DEPENDENT on another variable called independent variable. The dependent variable is the variable that is measured or recorded by the experimenter during the experiment.

In this case where a student is studying the effect of fertilizer on fruit growth. He uses 6 tomato plants, which were given different concentrations of fertilizer (independent variable). After the experiment, the weight of the tomato fruit were measured. This means that the FRUIT WEIGHT is the dependent or responding variable.

5 0
3 years ago
The table provided shows the predator-and-prey relationships in a wetland habitat.
Varvara68 [4.7K]

Answer:

mosquitoes

Explanation:

more population means that they will eat more (decrease in mosquito population)

8 0
2 years ago
What types of cells carry out photosynthesis?
Sedaia [141]

On the cellular level, the reactions for photosynthesis occur in organelles called chloroplasts (in eukaryotic cells). Blue-green algae (which are prokaryotic) carry-out the photosythesis reactions in the cytoplasm.

So all of the above

5 0
2 years ago
1. When 2 different alleles occur together, the one expressed is called?
zloy xaker [14]

Answer:

Dominant

Explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • Which best describes an acquired trait? A.An acquired trait is encoded in the DNA.
    10·2 answers
  • What term best describes a failure of the body's cells to respond to secretion of insulin?
    9·1 answer
  • In a cell, A. energy-releasing reactions are coupled to energy-absorbing reactions. B. more energy is used up than is produced.
    8·1 answer
  • Where is the electron transport chain for cellular respiration located?
    7·2 answers
  • A haploid human genome consists of 3 billion base pairs. If the distance between each base pair is 0.34 nm (a nanometer is one b
    13·1 answer
  • What characteristics do all organisms in the domain eukarya have in common?
    13·1 answer
  • 3. Explain why some lobsters may have one claw that is larger than the other claw.​
    15·2 answers
  • PLEASE HELP! 5TH GRADE SCIENCE!
    15·2 answers
  • Please help i am giving brainiliest
    10·2 answers
  • Natural selection is an evolutionary mechanism by which _______. a. advantageous traits are eliminated in a population b. advant
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!