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Vlada [557]
2 years ago
9

How do materials move between cells ?​

Biology
2 answers:
DIA [1.3K]2 years ago
4 0
<h2>Answer:</h2><h2>☠☠☠⭐⭐</h2>

The efficiency of movement of substances in and out of a cell is determined by its volume to surface area ratio.

Gelneren [198K]2 years ago
4 0
Diffusion or active transport water moves via osmosis
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What is this? Please answer with an explanation
Oksi-84 [34.3K]

Answer:

precipitation

Explanation:

its a big boy word for rain ;)

6 0
3 years ago
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In a famous experiment, Matthew Meselson and Franklin Stahl grew E. coli cells in a medium containing only the "heavy" isotope o
Alex777 [14]

Answer:

3rd generation = 2 Hybrid DNA molecules + 6 Light DNA

In Percentage 2÷8 × 100 = 25%

25% of the DNA are hybrid

Explanation:

Semi conservative model proposed by Watson and Crick states that one strand of the DNA comes from parent DNA which act as a template for the other newly formed strand.

First generation:

If cells containing 15 N DNA are transferred to a medium with only 14 N then in initial first generation two parent strands becomes separated and act as template for newly synthesized strands. this means that in first generation both DNA molecules are hybrid, one strand of 15 N DNA and other strand of 14 N DNA

Ist generation = 2 Hybrid DNA molecules

Second generation:

In Second generation these two hybrid molecules become unzip. Two strands are 15N and two strands are 14N. All these 4 strands act as template and 4 new strands are synthesized. The molecules of Hybrid DNA is still 2 with 2 molecules of Light DNA.

2nd generation = 2 Hybrid DNA molecules + 2 Light DNA

Third generation:

In Third generation these two hybrid molecules and two light DNA molecules become unzip. Two strands are of 15N and six strands are of 14N. All these 8 strands act as template and 8 new strands are synthesized. The molecules of Hybrid DNA is still 2 with 6 molecules of Light DNA.

3rd generation = 2 Hybrid DNA molecules + 6 Light DNA

In Percentage 2÷8 × 100 = 25%

25% of the DNA are hybrid

4 0
3 years ago
About 12 to 24 hours after the last meal, a person's blood sugar level normally varies from 60 to 90 mg per 100 ml of blood, alt
VMariaS [17]

Answer:

Homeostasis.

Explanation:

The insulin and glucagon hormone are important for the maintenance of the blood sugar level in the body. The glucagon increase the blood sugar level whereas insulin decreases the blood sugar level.

The homeostasis may be defined as the process of the maintenance of the normal physiological conditions of the body irrespective of the change in the external and internal environment. The change in the blood sugar level can be maintained by the insulin and glucagon hormone and is important for the homeostasis maintenance.

Thus, the answer is homeostasis.

8 0
3 years ago
What are the four criteria for minerals?
Leona [35]

Answer:

color, streak, hardness, luster, diaphaneity, specific gravity, cleavage, fracture, magnetism, solubility

Explanation:

These physical properties are useful for identifying minerals. However, they are much more important in determining the potential industrial uses of the mineral.

8 0
3 years ago
A plant absorbs energy from the Sun. Where does the energy go from there? All of the energy is transferred to primary consumers.
Dima020 [189]
The answer is :
<span>Some of the energy is stored in the plant's tissues and the rest is released as heat energy. </span>
7 0
3 years ago
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