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
Svet_ta [14]
3 years ago
12

Oxygen was initially created in Earth's atmosphere by _____.

Biology
2 answers:
solniwko [45]3 years ago
6 0
Which would also be known as <span>cyanobacteria photosynthesizing. Good Luck!</span>
Evgen [1.6K]3 years ago
3 0
Oxygen was initially created in Earth's atmosphere by algaes. It is estimated that marine plants produce between 70 and 80 percent of the oxygen in the atmosphere. Nearly all marine plants are single celled, photosynthetic algae. Hope this answers the question.
You might be interested in
1. John and Aubrey are trying to decide where to go for dinner. John says he wants Chinese. He
kodGreya [7K]

Answer:

true

Explanation:

Just because he told she's being selfish ext.. lol it's not normal

3 0
2 years ago
What happens to the values as you move up the left side a min/max thermometer?
zhuklara [117]
The answer is <span>They decrease</span>
8 0
3 years ago
The biceps femoris muscle's name gives us information about it. What does the word "femoris" in its name tell us? A. Its general
zhenek [66]

Answer:

the answer is D

Explanation:

The prefix bi indicates that the muscle has two origins

The biceps femoris muscle of the leg derives its name from having two heads of origin, long and short

8 0
3 years ago
How do Euglena and sperm cells use flagella?
loris [4]

Answer:

All euglena have chloroplasts and can make their own food by photosynthesis. ... Euglena move by a flagellum (plural ‚ flagella), which is a long whip-like structure that acts like a little motor. The flagellum is located on the anterior (front) end, and twirls in such a way as to pull the cell through the water.

Explanation:

In general, flagellum is a long whip like organ which protrudes to the exterior from the cell body and permits mechanical work without any marked change in the form of the effector cell. In Euglena, there are two flagella. One of them is equal in length to body while other is short.

3 0
3 years ago
HELP PLEASE ASAP
klemol [59]
Marble is formed from limestone and contains tiny interlocking grains.

Your answer is C.
5 0
3 years ago
Other questions:
  • Which chemical shown in figure 8-3 is an electron carrier molecule
    5·2 answers
  • Where is undigested material stored before it leaves the body?
    10·1 answer
  • Al of it please !!!!!!
    13·2 answers
  • If death rates exceed birth rates and migration rates do not change, then what will happen to the population?
    11·2 answers
  • A tubal ligation is a permanent sterilization procedure in which a woman's fallopian tubes are blocked or severed. Which of the
    12·2 answers
  • What caused the mammoth cave to form
    9·2 answers
  • 6. The following atoms are all variations of the element carbon: 12C, 13C, and 14C due to differing
    8·1 answer
  • A stem cell is
    12·2 answers
  • Consider how sedimentary rocks are formed, from sediments! Sediments are composed of particles that often come from existing
    12·2 answers
  • Three bird species share a habitat Bird A eats insects and plant seeds. Bird B drinks flower nectar. Bird C eats plant seeds. A
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!