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
djverab [1.8K]
3 years ago
10

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

alves prevent a backflow of blood into the left atrium?
A. Aortic valve
B. Tricuspid valve
C. Mitral valve
Biology
1 answer:
Readme [11.4K]3 years ago
8 0
Hello
the answer is c
have a nice day
You might be interested in
Fish, snakes, and birds are all types of A. spiracles B. vertebrates C. invertebrates D. insects
neonofarm [45]
Vertebrates. they are all chordates, which mean they have a notochord somewhere in their body.

6 0
3 years ago
In a certain plant, yellow leaves are dominant and red leaves are recessive. A plant with genotype Yy and a plant with Yy are cr
Tanzania [10]

Answer:

One offspring would have red leaves.

Explanation:

Given

Yellow leaves are dominant and red leaves are recessive

Let us assume that the trait of Yellow color of a leaf be  represented by "Y"

and the trait of red color of a leaf be  represented by "y"

When two parent of genotype "Yy" are crossed with each other, the following offsprings are produced as shown in the punnet square below

Y y

Y YY Yy

y Yy yy

Total four offpsrings are produced out of which only one has red leave as red color is a recessive trait and it will appear only when both the allele in a cell are of red color.

Thus, one offspring would have red leaves.

7 0
2 years ago
Biologists use molecular clocks to try to measure _____.
yulyashka [42]
I am pretty sure that biologists use molecular clocks to try to measure <span>when two species separated from a shared ancestor. Do hope you still need the anwer because this one is definitely correct, do not hasitate to use it! Regards.</span>
8 0
2 years ago
Read 2 more answers
Who were the first 2 scientists to describe cells?
Svetllana [295]

Answer:

Theodor Schwann and Matthias Jakob Schleiden

Explanation:

3 0
2 years ago
Read 2 more answers
How are so few producers able to support so many primary consumers?
avanturin [10]

Answer:

Because primary producers get 100% energy consumption straight from the sun.

Explanation:

We use the energy pyramid to help us out:

.01% - A pex Predators

0.1% - Tertiary Consumers

1% - Secondary Consumers

10% - Primary Consumers

100% - Primary Producers

Because Primary Producers get 100% of the energy of the sun, they can support so many primary consumers, who only get 10% of the energy when they consume primary producers.

8 0
3 years ago
Other questions:
  • A key hormone shared by the central nervous system and the immune system is _____, which is produced in the hypothalamus and uni
    15·1 answer
  • How are the different colors observed related to the electron structure of the atoms?
    13·1 answer
  • Question 1 (3 points)
    13·1 answer
  • Which characteristic of a protein may change during a dna mutation
    8·2 answers
  • Mendel is considered the Father of Genetics. His famous pea plant experiments helped to formulate several laws in genetics that
    6·1 answer
  • What are the main sources of carbon dioxide in the<br> atmosphere?
    12·1 answer
  • Based on the information in the table above, what Domain name should replace the X?
    15·1 answer
  • How many years does a snake live and how many times does it change its skin without pictures please and without links​
    10·2 answers
  • ____ is the species that plays an especially important role in its community so that major changes in its numbers affect the pop
    9·1 answer
  • Describe the change that you made that led to the decrease in the size of the greenleaf population.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!