BIOLOGY HIGH SCHOOL

Which domain includes prokaryotic organisms that can live in extreme conditions? (2 points)Archaea
Bacteria
Eukarya
Prokarya

Answers

Answer 1
Answer:

Answer: The correct answer is -

Archaea.

Explanation:

Archaea is one three domains of life forms (according to Carl Woese three domain system of classification) that includes prokaryotic organisms that survive under extremely harsh environmental conditions such as hotsprings, volcanic eruption, highly acidic conditions etc.

These organsisms are therefore also known as extremophiles.

Example - Methanogens.

Thus, Archaea is the right answer.

Answer 2
Answer: Archea are known to survive harsh conditions.

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These compounds store genetic information.

Answers

B. They are found in living things. 

This is because proteins, carbohydrates and lipids store energy but not nucleic acids. On the other hand, nucleic acids store and transfer genetic information but not the rest of the molecules. Hence, the only thing applicable to all four is that they are found in living organisms

Which of the following statements about eutrophication is NOT true?(A) It is caused by acid rain.
(B) It is caused by the addition of nutrients to a water system.
(C) It is most harmful when there is little flow through in the system.
(D) Phosphorus is the main causal agent.
(E) Humans are responsible for most eutrophication.

Answers

The correct option is A. Eutrophication is not caused by acid rain. Eutrophication occurs as a result of availability of nutrients which are neccessary for plant growth. These nutrients are typically released into water bodies as a result of human activities.

Certain animals, such as kangaroos and cats, are well known for their jumping abilities. What would you hypothesize about the biomechanical characteristics of their muscles?

Answers

all the biomechanics of these animals have been developed for these certain skills that have been developed, their muscles were created and adapitaram such abilities that were granted to them!

I have helped you with my answer!

Damage to the ozone shield over the UnitedStates is likely to cause
(1) increased warming of local ecosystems
(2) increased exposure to ultraviolet light
(3) reduction in the pH of acid precipitation
(4) reduction in the frequency of floods and
droughts

Answers

Answer:

The correct answer is option (2) "increased exposure to ultraviolet light".

Explanation:

The ozone shield or the ozone layer is a region of the atmosphere comprised of high concentrations of ozone that absorbs most of the Sun's ultraviolet radiation. Therefore, damage to the ozone shield will cause increased exposure to ultraviolet light over the United States. This could cause harmful consequences such as an increase of cases of skin cancer, sunburn and cataracts.
(2) increased exposure to ultraviolet light. The ozone layer protects us from UV light.

Which structure does a eukaryotic cell have that a prokaryotic cell does not have?

Answers

eukaryotic cells have a nucleus and prokaryotic cells do not.
membrane bound organelles

What is a limitation of using electron microscopes to view specimens? (2 points)

Answers

Answer:

The electron microscope uses electrons to form images for this reason does not allow to observe living cells because they need to work in a high vacuum atmosphere, the samples require preparation through a long fixation process, which means that it is not possible to observe living cells. To observe a cell with this microscope, dead cells must be observed, after being fixed and stained with heavy metal ions.

In these microscopes it is not possible to observe the cells carrying out their normal behaviors (for example, migrating or dividing) under the microscope
The correct answer is C. You cannot view live specimens because the necessary preparation kills cells. 

The answer is pretty self-explanatory. Unlike it, regular microscopes can view living creatures such as bacteria or similar.
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