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creativ13 [48]
3 years ago
7

1. What were the conditions on the planet when life began?

Biology
1 answer:
Marianna [84]3 years ago
8 0

Answer: The early Earth had no ozone layer and was probably very hot. The early Earth also had no free oxygen. Without an oxygen atmosphere very few things could live on Earth. Anaerobic bacteria were probably the first living things on Earth.

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Scientists often classify organisms based on their ability to perform certain processes
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A. Plants can make their own food using energy from the Sun.

Animals cannot make their own food.

Explanation:

An example of the physiological capabilities of plants is their ability to make food on their own using the energy from the sun and chemical substances in the environment, animals do not make their own food.

  • Physicological ability refers the body functions of an organism. It refers to the life biochemical processes a body is able to carry out based on its design.
  • Metabolism is a living function attributable to all life.
  • Organisms can either build up energy such as seen in plants during photosynthesis. This process is called anabolism.
  • Some other organisms, makes use of the energy in their own life process and this is a catabolic process.

Learn more:

Life functions brainly.com/question/1601808

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The existence of introns in mRNA-encoding genes seems to be a problem because so much cellular energy goes into splicing them ou
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Answer:

In normal conditions, introns serve following functions in the body of an organism:

1) They contain genes of miRNA which are known as Mirtrons, reverse transcriptase, endonucleases, transposase etc.

2) It is because of presence of introns that alternative splicing of mRNA is possible. The sex determination in drosophila is based on alternative splicing.

Apart from this, alternative splicing can be useful and beneficial in an unforeseen situation such as an environmental problem which is faced by the organism for the first time.

Explanation:

Alternative splicing is an important mechanism because with the help of alternative splicing different type of proteins can be synthesized from the same pre mRNA transcript. In case suddenly the surrounding environment of an organism is changed and the environmental conditions have become extremely harsh due to which organism's life is at stake, in such situation organism may make a different type of protein through alternative splicing which can help the organism in survival.  

Default splicing in Drosophila leads to the development of male off-spring while female off-spring is produced as a result of alternative splicing.  

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