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vlada-n [284]
3 years ago
9

Which of the following accurately reflects the beliefs on Earth's early history?

Biology
1 answer:
harina [27]3 years ago
3 0
The following statements accurately reflect the beliefs on Earth's early history:
B. Scientists believe the early atmosphere lacked the oxygen necessary to support modern human life.

The following statements are incorrect:
A. Scientists believe that DNA may have existed before RNA - Scientists actually believe the opposite - RNA may have existed before DNA.
C. Scientists believe that microspheres nearly prevented the development of early life.
D. Scientists believe that oxygen was plentiful in the early atmosphere - again, scientists believed the opposite

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Which word describes a slope
marusya05 [52]
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noun
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6 0
2 years ago
How do genes determine the traits of an organism?
Alecsey [184]

The genes, which are part of DNA, contain the<u> genetic information</u> inherited from the parents determine the traits of an organism.

The ‘complete set of all the genes and the DNA’ is called the genome which stores the entire set of information of how an organism is structured and maintained.

The pattern of dominant and/or recessive traits and the genetic variations are determined by the allelles.  

Explanation:

The genetic codes in the genes represent the particular amino acid codes and their linkages specific to particular protein.  The amino acids link together to form long polypeptide chains of protein molecules.  

These proteins determine various traits through various roles like:

Messenger proteins: Hormones like insulin, estrogen etc., control and coordinate various functions of the body

Pigments: Like melanin determines the color of the hair, skin, eyes.

Structural protein: Like keratin gives structure of hair, nails; myosin determines muscle structure

Antibodies: Determine the immunity of a person

Ion channel proteins, messenger proteins, structural proteins, receptor proteins etc.: Determine various physiological traits.

7 0
3 years ago
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Which is an environmental factor that affects skin color in humans? amount of food consumed amount of sunlight absorbed number o
Zepler [3.9K]

Answer: Amount of sunlight absorbed

Explanation:

The amount of sunlight absorbed by the body affect the color of the individual. Rest all the factors that affects the color of the individual are genetic factors.

The person who absorbs more sunlight will have more melanin concentration or amount in their cells as as compared to the person who absorbs less sunlight.

Hence, the correct answer is option sunlight absorbed.

7 0
3 years ago
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