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Nutka1998 [239]
2 years ago
8

what evidence and logical reasoning support the conclusion that anaerobic organisms evolved first, followed much later by aerobi

c organisms?
Biology
1 answer:
NISA [10]2 years ago
8 0

Answer: The atmosphere of the early Earth consists mainly of carbon dioxide and nitrogen, with little or no oxygen. In this case, the ancient prokaryotes are anaerobic, which evolved in the absence of oxygen. Eventually, when photosynthetic bacteria became common, they released oxygen and changed the Earth's atmosphere.

Explanation: i took a test with this on it, i hope my answer helps

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The purpose of pre-cleaning the dental operatory is to..
Marat540 [252]

B.

All dentist equipment is used in the mouth. Many deseases, bacteria and viruses are transmitted trough saliva, and not all of these are weak. So, that is why we clean the dental operatory, to lower the chances of transmitting anything.


Hope it helped,


BioTeacher101

5 0
2 years ago
Create a Venn diagram comparing prokaryote and eukaryote cells<br><br><br>plz help
GuDViN [60]
Prokaryotes: the simplest and oldest form of life, single celled, start of live/where all life came from, they can live in any environment on Earth, bacteria are the only prokaryotes. They DO NOT have a nucleus. Tails help them move along with little hairs around the cell. No organelles, they have circular chromosomes, they're unicellular or colonial, they have a cell wall and cell membrane.

Eukaryotes: Have a nucleus as well as organelles, linear chromosomes, have a cell wall (plants&fungus), have a cell membrane.

Hope I was able to help! :)
6 0
3 years ago
The various parts of the endomembrane system serve different functions in the cell. In this activity, you will identify the role
mixas84 [53]

Answer:

1. protein synthesis - (b) rough ER

2. protein modification and sorting - (c) Golgi apparatus

3. macromolecule digestion - (d) lysosomes

4. lipid synthesis - (a) smooth ER

5. autophagy - (d) lysosomes

6. cisternal maturation - (c) Golgi apparatus

7. calcium ion storage - (a) smooth ER

8. poison detoxification - (a) smooth ER

Explanation:

Rough ER or rough endoplasmic reticulum with the help of ribosomes is responsible for protein synthesis and their subsequent transport to various other parts of the cell that is why both these organelles are also known as protein factory.

Soon after proteins are synthesized with the help of rough ER, they are transported to another network of organelle known as golgi apparatus. In golgi apparatus, the nascent protein is further modified and sorted. Modification and sorting of proteins help in identifying their final destination i.e. whether the protein is meant for mitochondria or plasma membrane or some other organelle. Maturation of cisternae also takes place in golgi apparatus.

Smooth ER or smooth endoplasmic reticulum is responsible for lipid synthesis, storage of calcium ions and poison detoxification. Most of the steroid hormones, triglycerols etc. are synthesized in the smooth endoplasmic reticulum. Smooth ER also stores calcium ions so that whenever they are required they can be sequestered back into the cytosol. Poison detoxification occurs in the smooth ER of liver because the enzymes present in the liver are capable of converting such hydrophobic substances into hydrophilic substances so that they could be easily secreted out of the body.

Lysosome is the organelle which is responsible for macromolecule digestion and autophagy. Lysosomes have very low pH and a lot of hydrolyzing enzymes which can easily digest macromolecules. Autophagy is a self degradable process in which damaged cells are eaten or destroyed by lysosomes so that their macromolecules could be broken down into their monomers so that they can be reused by our body.

3 0
3 years ago
which statements about oxidative phosphorylation are true? the mechanisms of phosphorylation and oxidation are directly coupled.
arlik [135]

The true statements about oxidative phosphorylation are the mechanisms of phosphorylation and oxidation are directly coupled.

<h3>What is oxidative phosphorylation ?</h3>
  • An electron transfer chain that is fueled by substrate oxidation and connected to ATP generation via an electrochemical transmembrane gradient is known as oxidative phosphorylation (OXPHOS).
  • Cells employ enzymes to oxidize foods in the metabolic process known as oxidative phosphorylation, electron transport-linked phosphorylation, or terminal oxidation, which releases chemical energy to create adenosine triphosphate. This happens inside mitochondria in eukaryotes.

Steps in Oxidative Phosphorylation

  • Electron Transport using NADH and FADH2. Near the start of the transport chain, reduced NADH and FADH2 transmit their electrons to molecules. ... the splitting of oxygen into water, proton pumping, electron transport, and ATP synthesis.

To learn more about oxidative phosphorylation refer to:

brainly.com/question/8562250

#SPJ1

4 0
11 months ago
Which is not a form of subsistence agriculture?
Volgvan
Mediterranean is the answer
5 0
3 years ago
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