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Evgen [1.6K]
3 years ago
6

Why is a shell considered to be biotic?

Biology
1 answer:
Savatey [412]3 years ago
8 0

A shell is considered as biotic (living) because it is a hard, rigid covering of many animals such as snail, sepia, pila, turtles, sea urchins. A shell is protective outer layer of these soft bodied animals. Shells are made of calcium carbonate in the form of  calcite or aragonite crystallized in an organic matrix. Shells of other animals are composed of chitin, bone or cartilage. That's why a shell is considered as biotic (living).

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Imagine you have to convert a shrub into a tree what are the things you will change in it​
DiKsa [7]

Explanation:

I would change its existing soil. some trees and shrubs thrive if you replace existing soil with certain minerals and fertilizers where you plant the Bush..

in my case, we have clay soil poor 4 most plants., b4 planting outside, put fertilized soil in the hole your planting 1st, then existing soil..

5 0
3 years ago
What is the process which increases carbon dioxide levels in the air
Ugo [173]

Answer:

organisms respire or decompose (decay)

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3 years ago
Where are phospholipids most likely found in a eukaryotic cell?.
kondor19780726 [428]

The cell membrane is composed by a lipidic bilayer. Phospholipids are most likely found in the membrane of a eukaryotic cell.

<h3>MEMBRANE COMPOSITION</h3>

The cell membrane is composed of

  • two lipidic bilayers,
  • cholesterol,
  • proteins, and
  • glucans incrusted in between.

The membrane is mostly composed of phospholipids.

<h3>PHOSPHOLIPIDS</h3>

Phospholipids are amphipathic molecules.

They have hydrophilic heads facing the exterior and the interior of the cells and hydrophobic tails that arrange against each other in the interlayer space.

Lipids can easily change places with other lipids by lateral diffusion in the same layer.

They can diffuse transversally to the other layer but not as easily as lateral diffusion.

There are also other lipidic movements as rotational diffusion that imply the rotation of the molecule.

Phospholipids are most likely found in the membrane of a eukaryotic cell.

Yo will learn more about phospholipids at

brainly.com/question/5793606

4 0
2 years ago
Both normal and transient flora can become opportunistic pathogens. True or False
ElenaW [278]

Answer:

True

Explanation:

Normal flora are  microorganisms that are regarded as resident organisms, which can be found on or in an individual and do not cause any disease.

the transient flora refers to microorganisms that are found on the skin or the hands which are there through direct contact with person or object, and are easily removed by routine hand hygiene. Example is Norovirus that can cause stomach flu.

Opportunistic pathogens are microorganisms such as the bacteria and virus, which can only cause infection when the immune system is down. This means that , these organisms can not cause any infection as long as the immune system is ok.

In this case, the normal and transient flora like Norovirus can only cause infection when the immune system is down. That is why they are regarded as opportunistic pathogens.

3 0
3 years ago
Read 2 more answers
The knee is an example of a ​
Salsk061 [2.6K]

Answer:

Joint - a joint is where two bones articulate

In this case, the femur and tibia form a joint.

6 0
4 years ago
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