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
Likurg_2 [28]
3 years ago
8

"What are the bacteria living in the ocean that do the nitrogen fixation, and were the first photosynthesizers on Earth providin

g the early oxygen found in the atmosphere around 2 billion years ago
Biology
1 answer:
Bogdan [553]3 years ago
7 0

Answer:

Cyanobacteria

Explanation:

Cyanobacteria were the first photosynthetic autotrophs that used water molecules as the source of electrons. Cyanobacteria were the first autotrophs that performed oxygenic photosynthesis and carried out the splitting of water.  

The process of splitting water released oxygen as a gas (O2) which was released in the atmosphere of the earth as a by-product. This led to the accumulation of oxygen in the atmosphere. Some cyanobacteria can fix nitrogen and have specialized cells called heterocyst which serve as the site for nitrogen fixation.  

You might be interested in
Stem cell and cancer question. Please answer Asap!!
malfutka [58]

Metastasis will happen and cancer cells invade nearby healthy cells, tissues, lymph nodes, organs or will migrate to distant organs.

The two different types of stem cells broadly classified as  are Embryonic stem cells and adult stem cells. Embryonic stem cells are obtained from the blastocyst layer of the embryo and are pleuripotent. Whereas adult stem cells are the undifferentiated cells from tissues of an adult or a child. They can be unipotent or multipotent.

Explanation:

Cancer cells migrate to other parts of the body via blood and lymphatic system. This is called as metastasis. Cancer cells when becomes tumour they develop their own blood vessels and obtain nutrients from them. Once the tumour gets big it pushes the normal healthy cells of the neighbouring tissues and keeps on spreading.

Stem cells obtained from the embryo can differentiate into any types of cell and when grown in-vitro can dramatically form the three germ layers.

The adult embryo cells are found in less quantity, their role is to repair the tissue they reside in.

4 0
4 years ago
What prevents a lake or ocean from freezing solid
PIT_PIT [208]

Answer:

its sea salt ig(i guess)

Explanation:

6 0
3 years ago
Read 2 more answers
When pure black hamsters were mated with pure white hamsters, all of the offspring were black. The trait for whiteness would bes
Angelina_Jolie [31]

Answer:

Recessive

Explanation:

All of the offsrping were black so that means black was the dominant gene and white was the recessive

5 0
3 years ago
PLEASE HELP! Bruh I will give brainly
liubo4ka [24]

Answer:

Analytical Chemistry

7 0
3 years ago
Read 2 more answers
What are two abiotic factors that can affect water?
erma4kov [3.2K]
>Temperature
>Soil



I think so..................
3 0
3 years ago
Other questions:
  • Receiving signals from the environment or other neurons and carrying the information toward the cell body is a function of the _
    8·2 answers
  • What is the domain of bacteria
    5·1 answer
  • PLEASE HELP ME!!!! 15 points!!!
    15·1 answer
  • Connective tissue extracellular matrix is composed of ________. cells and fibers fibers and ground substance ground substance an
    14·1 answer
  • A protein is made and inserted into the membrane of the rough endoplasmic reticulum. A binding site that is present in this prot
    8·1 answer
  • The intervening age between childhood and puberty​
    12·1 answer
  • Which statement best indicates the accuracy of the mother's comment?
    8·1 answer
  • Think about the various combinations of eye color that can be passed on to one's children. Think about two parents that are domi
    7·1 answer
  • Can someone help me please
    6·1 answer
  • Which traits in the investigation showed incomplete dominance?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!