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Shtirlitz [24]
3 years ago
11

What are stem cells?

Biology
1 answer:
OlgaM077 [116]3 years ago
6 0

Stem in plants:

Is the movement of material like water and minerals from roots to leaves. And they storage foods.

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The rate of a reaction catalyzed by an enzymes usually ________ with temperature; however, at temperatures above the optimum ran
oksano4ka [1.4K]

Answer:

increases; protein denaturation occurs

Explanation:

One of the characteristic of enzymes is the sensitivity to temperature .

Enzymes are sensitive to the changes in the environmental temperature.The enzymatic activities increases with increase in temperature,up to the optimum of 37 degrees in most animals.

However,once the optimum temperature has been exceeded,enzyme activities drops.This is because below optimum the rate of collision between the enzyme active sites and substrate molecules is very high,therefore more products are formed which increases the rate of reactions.

At temperature above the optimum,the high temperature  breaks the bonds,especially the hydrogen bonds holding the 3D structure of the active sites.Therefore,substrate molecules can not fit into the active site,and therefore enzymatic actives of the enzyme is affected,and the enzyme is said to be  denatured

4 0
4 years ago
Differentiate between the lithosphere and asthenosphere
allsm [11]

Answer:

Lithosphere made the earth outermost layer, crust and upper portion of mantle.

Asthenosphere made the middle layer of earth.

Explanation:

Lithosphere:

Lithosphere made the earth outermost layer, crust and upper portion of mantle.

It is made up of tectonic plates.

Lithosphere present over the asthenosphere.

Lithosphere have low temperature as compared to asthenosphere.

Its rocks are rigid.

It is less viscous and dense

Asthenosphere:

Asthenosphere made the middle layer of earth.

When material present in asthenosphere solidify it becomes the part of lithosphere.

Asthenosphere have high temperature as compared to the lithosphere.

Its rocks are plastic and have tendency to flow.

It is more viscous and dense.

3 0
4 years ago
An organism is unicellular, contains chlorophyll, and has a flagellum. to which kingdom does this organism belong?
denis23 [38]
This organism belongs to the Plantae kingdom
8 0
3 years ago
7. Which of the following elements is LEAST likely to be found in sugar molecules
monitta

Answer:

sulfer

Explanation:

7 0
3 years ago
Read 2 more answers
Lactose a sugar found in milk products is broken down by enzymes. The making of these enzymes is controlled by a genetic system
natita [175]
I'm 99 percent sure that the answer is replication. Hope it helps!
4 0
3 years ago
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