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
ad-work [718]
3 years ago
8

The archean eon spans the time from the formation of the earth until _____ years ago

Biology
1 answer:
romanna [79]3 years ago
7 0
2.5 billion years ago

you're welcome :)
You might be interested in
Acetaldehyde, a metabolic byproduct of alcohol, damages bodily tissues by making them more likely to ___.
CaHeK987 [17]
I believe the answer is B.
4 0
3 years ago
Read 2 more answers
The ability to detect physical energy through our visual or touch systems
PIT_PIT [208]
Sensation

detection of physical energy by sense organs, which then send info to the brain
- Detection of stimuli by sense organs
- how info gets to our brain = detecting stimuli
- allows us to pick up the signals in our environment
- ex. vision- going through eye to visual cortex and smell - going through nose.







8 0
3 years ago
Which of the following techniques separates molecules based on size?
WITCHER [35]
Is size exclusion chromatography one of the choices?
4 0
3 years ago
When did oxygen begin to accumulate in the atmosphere
oee [108]

Answer:

2.33 billion years ago.

Explanation:

Hope this helps <3

4 0
2 years ago
Read 2 more answers
The structure that prevents backflow of blood into the left atrium is the . The vessel that carries oxygen-rich blood to tissues
iVinArrow [24]

Answer:

The structure that prevents backflow of blood into the left atrium is the mitral valve.

The vessel that carries oxygen-rich blood to tissues is the aorta.

The capillaries receiving blood flow from the left side of the heart are the Systemic capillaries.

The structure that is located anatomically between the aorta and the left ventricle is the Aortic semilunar valve.

Explanation:

The left atrium receives oxygen-rich blood from the pulmonary vein and passes it to the left ventricle. The back-flow of blood from the left ventricle into the left atrium is prevented by mitral which is a bicuspid valve. The vessel that carries oxygen-rich blood to tissues is the aorta.

Aorta receives oxygen-rich blood from the left ventricle and pumps it into its branches to deliver the blood to the body tissues. Systemic capillaries are the blood vessels that obtain the oxygen-rich blood from the left ventricle through the aorta. Systemic capillaries serve as the site for the exchange of gases and nutrients.

The aortic semilunar valve is located Aortic semilunar valve is the half-moon shape valve present between the left ventricle and aorta to prevent the black flow of blood to the left ventricle.

3 0
3 years ago
Other questions:
  • Where in eukaryotic cells does protein synthesis take place
    8·2 answers
  • What affects do islands have on animal size
    9·1 answer
  • The rainforest_____
    13·1 answer
  • Since cells can't store atp for a long time, how do they store energy?
    7·1 answer
  • In Drosophila, red eyes is wild-type and purple eyes are mutant. Full-size wings are wild-type and vestigial wings are mutant. F
    13·1 answer
  • Help i need help with this question
    14·1 answer
  • Visual Description. Where is crust being destroyed? ​
    13·1 answer
  • Reducing, reusing, and recycling are used to Group of answer choices make more ores increase metal production burn fossil fuels
    14·1 answer
  • Question 1 (1 point)
    8·1 answer
  • The menisci found in some synovial joints are attached to the ______ at the periphery of the joint cavity.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!