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In-s [12.5K]
3 years ago
9

Which two kingdoms consist only of cells without nuclei?

Biology
1 answer:
trapecia [35]3 years ago
8 0

Answer:

Eubacteria and archaebacteria

Explanation:

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By the year 2030 is estimated that nearly one in______Americans will be older than her age 65
zmey [24]

Answer:

A. 2

Explanation:

6 0
3 years ago
Read 2 more answers
What is one of the drawbacks to the extensive use of solar energy?
alukav5142 [94]

Um. The drawbacks to the extensive use of solar energy? well all the other statements about it are false so the correct answer would have to be B. Necessary equipment and installation are expensive

hope that helped

5 0
3 years ago
True or false: The energy contained in the food we eat directly powers all of our cellular activities. If false, please make it
Gwar [14]

Answer:

False

"The energy contained in the food we eat is used to synthesize the energy that directly powers all of our cellular activities".

Explanation:

The food we eat undoubtedly contains energy. This energy is stored in the bonds of the molecules that make up the food. However, the food undergoes the process of digestion to yield glucose (a sugar). This glucose sugar is used in the process of CELLULAR RESPIRATION to synthesize a form of chemical energy usable by cells called ATP.

ATP or Adenosine triphosphate is a molecule that stores chemical energy in living cells. It is the molecule that directly powers all of our cellular activities. Hence, the statement in this question is FALSE. The correct statement should be "The energy contained in the food we eat is used to synthesize the energy that directly powers all of our cellular activities".

5 0
3 years ago
Why cloning is considered as unethical? <br>​
vredina [299]

Answer:

Because the risks associated with reproductive cloning in humans introduce a very high likelihood of loss of life, the process is considered unethical. There are other philosophical issues that also have been raised concerning the nature of reproduction and human identity that reproductive cloning might violate.

3 0
3 years ago
A transcriptional repressor that controls the transcription of gene A is not normally active unless bound by an effector molecul
iren [92.7K]

Answer:

Increase in transcription

Explanation:

Transcription is the process of forming RNA from DNA. It can be controlled by many factors like a repressor. Repressor can bind to the operator region of the promoter and hinder the movement of RNA Polymerase enzyme, halting the process.

Here, it is given that the repressor needs to first bind to an effector molecule X. Once it binds to X, it is activated and then it can bind to operator of gene A to inhibit its transcription. If the X binding domain on repressor is mutated it wont be able to bind to X. Thus it wont get activated and wont be able to attach to operator region to inhibit transcription. Hence, transcription process will keep going on uncontrolled.

5 0
3 years ago
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