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
Nadya [2.5K]
3 years ago
9

Which group of animals has a closed circulatory system featuring a single circuit and two heart chambers?

Biology
1 answer:
kykrilka [37]3 years ago
5 0

Answer:

Fish

Explanation:

You might be interested in
Muscles help keep blood flowing normally through the body. How do muscles accomplish this task?
bezimeni [28]

Answer:

Option A, by having a constant supply of blood

Explanation:

Blood that flows to the muscles bring oxygen from the atmosphere to the contracting muscles where it gets consumed.  During large muscle exercise, two physiological needs arise – a) high and prolonged muscle blood flow and b) regulation of blood pressure so that there is adequate perfusion of pressure to all organs. In order to meet both the requirements, the blood flow increases so that the vasoligating muscles do not outstrip the cardiac output.

Hence, option A is correct

6 0
3 years ago
I’m not sure what it means for the cell membrane to be semi-permeable
Lesechka [4]

Answer:

It means that the cell membrane allows certain substances to pass through and not others. As the cell membrane consists of a phospholipid bilayer with a hydrophobic core, only small uncharged hydrophobic molecules can pass through the cell membrane e.g. glucocorticoid and other larger charged particles require transporters or channel proteins to pass through the cell membrane, e.g. glucose.

8 0
3 years ago
DNA is composed of two strands, only one of which typically is used as a template for RNA synthesis. By what mechanism is the co
Andreyy89

To choose the strand the promoter acts to aim the RNA polymerase.

<h3>What does RNA polymerase do?</h3>

RNA polymerase synthesizes RNA by following a strand of DNA. The primary transcription enzyme is RNA polymerase. When RNA polymerase connects to a promoter sequence near the start of a gene, transcription starts (directly or through helper proteins). To create a fresh, complementary RNA molecule, RNA polymerase employs one of the DNA strands (the template strand) as a template.

Three distinct RNA polymerases (RNAPs), which transcribe various kinds of genes, are present in all eukaryotes. RNA polymerase I transcribe rRNA genes, RNA polymerase II transcribes mRNA, miRNA, snRNA, and snoRNA genes, and RNA polymerase III transcribes tRNA and 5S rRNA genes.

Learn more about RNA polymerase here:

brainly.com/question/15872478

#SPJ4

3 0
1 year ago
Distillation is a _____________ separation technique. chemical physical
anastassius [24]
The answer is Physical
3 0
3 years ago
Read 2 more answers
For the average u.s. resident, the single largest source of radiation exposure is
Gelneren [198K]
Radon and Thoron are the most significant sources of radiation exposure to people living in the United States accounting for 37% of total radiation exposure.
These are nuclides that are produced from the radioactive decay of materials especially in consumer products and through natural processes such as the decay of radium.
8 0
3 years ago
Other questions:
  • Please help me with this bio question
    8·1 answer
  • What is homeostasis?
    12·1 answer
  • Your complete genetic code consists of the exact sequence of ________ within your ________.
    6·1 answer
  • What factors do you think determine the age of the universe
    13·1 answer
  • How are salts formed?
    10·1 answer
  • In science class,maria observes that a white colored flower has shades of red when its watered with red colored water. She forms
    15·1 answer
  • As a research scientist, you measure the amount of ATP and NADPH consumed by the Calvin cycle in one hour. You find that 30,000
    11·1 answer
  • Choose vacuoles are largest in ___________ cells. the incorrect statement concerning centrioles.
    11·1 answer
  • Describe a revisionary movement and provide an example.
    12·1 answer
  • Section 10.3<br> How does a cell control the process of cell division?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!