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
AURORKA [14]
3 years ago
12

Cyanobacteria were the first photosynthetic organisms. How were they responsible for allowing higher life forms to evolve? A. Th

ey released oxygen, which mixed to form iron, and later ferrous oxide, in the air. B. They released carbon dioxide, which evolving animals needed. Or C. They released oxygen, which created the ozone layer, resulting in reduced mutation rate.
Biology
2 answers:
bezimeni [28]3 years ago
8 0
<span> They released oxygen, which created the ozone layer, resulting in reduced mutation rate.

</span>
Andrews [41]3 years ago
6 0
B THEY RELEASED CARBON DIOXIDE, WHICH  EVOLVING ANIMALS NEEDED.
You might be interested in
How do daughter cells that result from mitosis and meiosis differ?​
dmitriy555 [2]

Answer:

Mitosis has 2 daughter cells as a result and meiosis has 4 daughter cells as a result.

Explanation:

meiosis doubles from mitosis

3 0
3 years ago
Which of these describes a quantitative observation?
Sergio [31]

Answer: <u><em>D. An observation that has a number associated with it</em></u>

Explanation: The answer is D. An observation that has a number associated with it. I would explain further, but it is pretty self explanatory.

<em>Good luck!</em>

3 0
3 years ago
Which statement is true about lethal genes?
Korvikt [17]
I'm not completely sure, but I'm fairly certain that the answer is B.
7 0
3 years ago
Why can't science prove something beyond a shadow of a doubt?
jarptica [38.1K]

Answer:

Scientific theories can never be proven true beyond all doubt; they can only be supported by a wide body of evidence. Only one of the statements that follow uses the term theory in its correct, scientific sense.

Explanation:

6 0
2 years ago
Read 2 more answers
Genes are ____________
atroni [7]

Answer:

b. pieces of DNA is the correct answer.

Explanation:

A gene is a piece of DNA and it is present in the nucleus of all cell's

The function of the gene is to codes for a specific type of protein.

Genes convey the message that determines our characteristics

Genes are called as a functional unit of genetics.

5 0
3 years ago
Other questions:
  • Which term refers to a cell that has more solute on the inside than on the outside?
    12·2 answers
  • According to Charles Darwin what is one reason that not all organisms survive in nature?
    12·1 answer
  • The student weighed pieces of courgette and placed them in five different concentrations of sugar solution.
    7·1 answer
  • Which of the following is NOT true of mechanical digestion? Muscular contraction in the stomach mix food The teeth and tongue br
    9·1 answer
  • Use the drop-down menus to complete the statements.
    6·2 answers
  • Movement of any particle or molecule from higher concentration to lower concentration is called
    10·2 answers
  • Plz help right now !!!!!!!!!!!
    11·1 answer
  • Identify the resources that cannot be replenished within the average span one
    12·1 answer
  • What is included in Earth’s hydrosphere?
    6·2 answers
  • A plant cell can be distinguished from an animal cell because of the presence of?​
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!