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Sveta_85 [38]
3 years ago
10

What invention allowed scientists to study cells for the first time?

Biology
1 answer:
Alina [70]3 years ago
8 0
The invention that allowed scientists to study cells for the first time is the Microscope
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Explain how you could determine which individuals were heterozygous by looking at the gel
crimeas [40]
You can determine which individuals were heterozygous by looking at the gel becuase it refers to a specific genotye in the punnet square table
3 0
3 years ago
NEED HELP ASAPP!!!! 1. Which of these is smaller: a cell or a protein?
Norma-Jean [14]

Answer:

\boxed {\boxed {\sf Proteins}}

Explanation:

Proteins are found inside the cell. There are proteins in the cell membrane and cytoskeleton, they act as enzymes inside the cell, and they are created inside the cell during protein synthesis at the ribosome.

Since proteins are part of the cell and are made inside the cell, the <u>proteins</u> must be smaller.

8 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
Which process are affected by the freeze and thaw cycles ?
Annette [7]
<h2>The answer is:</h2>

Expansion and cracking

<h2>Explanation:</h2>

Whenever water freezes, it is expanded about 9 percent. Since the water in moist concrete freezes it producing pressure in the pores of the concrete. The collective effect of freeze-thaw cycles and disruption of aggregate can eventually cause expansion and cracking, scaling, and crumbling of the concrete that is formed from moist.

3 0
3 years ago
Read 2 more answers
Wild-type E. coli grow best at 37 but can grow efficiently up to 42 . An E. coli strain has a mutation of the sigma subunit that
igor_vitrenko [27]

Answer:Temperature- Sensitive Mutation, C

Explanation:

AT 37°C ,<u> The organism transcribe a wild type--C.</u>

The type of mutation  exhibited by the mutant bacterial strain is a Temperature- Sensitive Mutation. This is because at different temperatures, the organism transcribes differently ie  transcribes at wild-type levels at 37°C and completely denatures and ceases to carry out transcription at 42°C .

5 0
3 years ago
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