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Novosadov [1.4K]
3 years ago
10

How do the cells of a multicellular organism differ from those of a unicellular organism?

Biology
1 answer:
Phoenix [80]3 years ago
7 0

A. They never replicate .

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I deleted my question, so I'm just here to say hi.
Scorpion4ik [409]

Answer:

hi how was ur day

Explanation:

4 0
3 years ago
Why do most stars not necessarily die in the time we would normally expect them to?
Ivanshal [37]
The reason why stars does not die when it is there time is because they tend to fuse in different and more heavier elements. In that way, it prevents them from dying for they were able to have the components of different elements, extending their lives and prevent themselves from dying on the time that they were supposed to.
4 0
3 years ago
Imagine you are studying a population of plants and you have determined that they are all genetic clones of one another. You are
maksim [4K]

Answer:

The frequency of the allele is  high in  the  population

Explanation:

The selective pressure in this population is low light. <u>Thus only plants with high tolerance for low light will be able to survive in this population. LLT gene plant has this trait</u>.

Therefore the LLT gene plants  will have  higher rate of survival compare  to other clones at very low light intensity .

The frequency of expression of these gene will be high due to high survival rates in the population.

8 0
3 years ago
4 a muscle cramp is a sudden, painful contraction of a muscle, during which movement is difficult. What is happening at the cell
stiks02 [169]

In the case of the muscular cramps, the muscle contraction starts with the generation of the action potentials from the brain. The action potential causes the release of the calcium ions movement out of the sarcoplasmic reticulum (storage site of calcium). The calcium released in this process causes the contraction of the myofibrils with the help of the ATP molecules. Meanwhile, the calcium is pumped back to the sarcoplasmic reticulum through the fast calcium pumps.  

The contraction of one muscle cell generate the action potential in neighboring muscle cells. When the generation of the action potential is stopped, the sarcoplasmic reticulum relaxes as well as the muscle is relaxed. The fast calcium pump is powered by a sodium gradient, and the calcium influx is a result of fast outflux of the sodium ions from the sarcoplasmic reticulum.

In case, the sodium ion is less, the calcium pumps cannot be powered, the calcium ion would remain in myofibril, as a result, the muscle would be contracted for a longer time and this result in cramps. The muscle in this case, would be relaxed by the ATP instead of sodium gradient. So, it can be concluded that the muscle cramps are caused when the muscles are not able to relax properly.  


3 0
3 years ago
Need Help ASAP!!
anzhelika [568]

Questions:

1. Supporting all stakeholders means that?

A. any solution benefits for all stakeholders equally .

B. the solution favors human needs over environmental.

C. one stakeholder is supported by the expense of the others .

D. all needs are taken into account and solutions are designed to consider them all .

2. Technology is not likely to change the field of marine science much in the future. (1 point)

A. True

B. False

3. The national oceanic and Atmospheric administration use to buoys to monitor (1 point)

A. ship traffic

B. weather patterns via satellite

C. movement of tectonic plates

D. water conditions around coral reefs

4. The first echo sounder was used in a German submarine. (1 point)

A. True

B. False

5. Why are marine oceanographers particularly concerned with coastal regions? (1 point)

A. Coastal regions are highly impacted by human activity.

B. Previous studies in marine science have largely ignored them.

C. They are the only areas that marine oceanographers can access.

D. By definition, marine oceanographers are only concerned with the coast.

6. Most colleges with strong marine biology departments are located in coastal regions. (1 point)

A. True

B. False

7. One of the biggest challenges in exploring polar regions is (1 point)

A. ice packs

B. hurricanes

C. polar bears and walruses

D. lack of latitude and longitude

8. The purpose of global regulation of the ocean is (1 point)

A. to protect and preserve the ocean

B. to deny dangerous countries access

C. to ban militaries from using the ocean

D. to minimize the role of commercial fishing

9. How did American captain William Anderson eliminate the problem of ice packs when exploring the arctic? (1 point)

A. He designed the ship to melt the ice .

B. He went under the ice packs with a submarine.

C. He developed a particularity narrow ship.

D. He went when temperatures were warmer .

10. By definition, an inorganic element is (1 point)

A. not alive

B. microscopic

C. in the ocean

D. immune to change

11. What does an echo sounder do? (1 point)

A. allows divers to better hear underwater

B. uses sound waves to map the ocean floor

C. documents sound at the deepest region of the ocean

D. eliminates all echos when divers are communicating underwater

12. There is one established method to solve all scientific problems. (1 point)

A. True

B. False

13. Regardless of the scientific question being asked, scientific research will include all of the following EXCEPT? (1 point)

A. use of the scientific method

B. a single approach in every situation

C. exploration of work by previous scientists

D. sharing results with the scientific community

14. Positive feedback in a system is (1 point)

A. words of praise

B. a benefit for the entire system

C. an interaction that benefits one element

D. an event that benefits one part while weakening another

15. What does the international ocean drilling program do? (1 point)

A. collects samples from the sea floor

B. advocates ending all drilling on the floor

C. determines international regulations for offshore drilling

D. searches the sea floor for the location of underground oil

Answers & Explanation

1. D. all needs are taken into account and solutions are designed to consider them all .

2. B. False

3. D. Water conditions around coral reefs

4. A. True

5. A. Coastal regions are highly impacted by human activity.

6. A. True

7. A. ice packs

8. A. to protect and preserve the ocean

9. B. He went under the ice packs with a submarine.

10. A. not alive

11. B. uses sound waves to map the ocean floor

12. B. False

13. B. a single approach in every situation

14. C. an interaction that benefits one element

15. A. collects samples from the sea floor

The final score is a 15/15 (100%)

7 0
3 years ago
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