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
Scilla [17]
4 years ago
14

Scientists have hypothesized that oxygen began to build up in the Earth's atmosphere after the development of living things with

the ability to A. breathe air. B. form tissues. C. photosynthesize. D. reproduce sexually.
Biology
2 answers:
kirza4 [7]4 years ago
8 0
C. photosynthesize

I hope this helps:)
Kruka [31]4 years ago
7 0

Answer:

The answer is c. photosynthesize

You might be interested in
Need help plss!!
olga55 [171]

Answer:

D. The scientist can determine if the population has lost genetic diversity by comparing sequences of individuals.

I just took the test and I got it wrong but it showed me the right answer

Btw are you in k12 just curious...

Explanation:

6 0
3 years ago
Which structure is at work when the body deals with reflex actions?
Ne4ueva [31]

Answer:

spinal cord

Explanation:

Reflex actions are the involuntary action of the body in response to a signal or stimulus. The reflex action of body is controlled by spinal cord.

Reflex arc acts as a neural pathways that transmit impulse to the brain via spinal cord. Sensory neurons pass through synapse in the spinal cord which activate spinal motor neuron to act immediately without any delay.

Immediate taking off hand from hot oven is an example of reflex action, which is regulated by spinal cord.  

Hence, the correct option is spinal cord.

 

5 0
3 years ago
Read 2 more answers
What would likely to happen if heavy pressure is applied when using a pumice stone on feet? ​
lubasha [3.4K]

Answer:

If you apply too much pressure, you can cause redness and abrasions.

8 0
3 years ago
What best defines genetic diversity? The variety of traits a species has. A group of organisms of one species. All the different
kap26 [50]
The variety of traits a species has best defines genetic diversity.
6 0
3 years ago
Read 2 more answers
How do autotrophs get nutrition?
ANTONII [103]

Answer:

B. By taking in inorganic substances

Explanation:

When you think of autotrophs, you may think of plants, and how do plants get nutrition?

By taking in inorganic substances like carbon dioxide or sunlight, then converting it into energy.

8 0
4 years ago
Read 2 more answers
Other questions:
  • Five body functions that monitor homeostasis
    11·1 answer
  • In order to become a functioning luciferase enzyme the string must
    10·1 answer
  • An honest mistake ___.
    14·2 answers
  • Choose one plant or animal. Be as
    15·1 answer
  • What is the gel-like fluid that fills the cell and surrounds the organelles?
    8·2 answers
  • Which part of an amino acid is the only one that varies and is what defines the properties
    11·1 answer
  • A blood pressure reading of 120/80 Question 2 options: a. indicates a diastolic blood prssure of 120. b. is an indication of hyp
    11·1 answer
  • A nucleotide consists of
    5·2 answers
  • Which organelle controls when and what proteins are made? *
    8·1 answer
  • What soil properties are influenced by microorganism activity?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!