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Darya [45]
3 years ago
11

Why do some fossils of some extinct organisms have been found while others have not?

Biology
1 answer:
nexus9112 [7]3 years ago
8 0
Because some decompose and are gone forever.
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the valence of aluminum is + 3 and the valence of chlorine is -1 the formula for aluminum chloride is correctly written as
ser-zykov [4K]
AlCl3. Each negative is balanced with a positive. 3 chlorine to make the -3 charge to balance the +3 charge from aluminum.
5 0
3 years ago
4: Units of inheritance known as genes exist in pairs.
Bas_tet [7]

Answer:

4. a

5. a

6. a

7. a

8. a

9. a

10. True

Explanation:

4. Units of inheritance in living organisms are known as genes. These genes exist in pairs in all organisms and a copy of each gene is passed down to the offspring during reproduction.

Correct option: a

5. Assuming the dominance of allele A over allele a:

                AA    x    aa

          Aa    Aa    Aa    Aa

All the offspring will appear tall since the effects of allele a is masked by allele A.

Correct option: a

6. From the cross in (5) above, the genotypic ratio of the offspring is 100% Aa.

Correct option: a

7. Alternate forms of genes in living organisms are known as alleles. A copy of the alleles is usually passed down to the offspring during the process of reproduction.

Correct option: a

8. Phenotypes are the physical appearance of organisms. They are physical interpretation of genes.

Correct option: a

9. The law of segregation was postulated by Gregor Mendel. It states that gene pairs segregate during the process of meiosis and then randomly unite during the process of fertilization.

Correct option: a

10 Heterozygous organisms have two different alleles for the same genes. For genes that obey Mendelian laws, heterozygous condition is characterized by one dominant and one recessive alleles.

7 0
3 years ago
Define the process of the above diagram​
Anika [276]
I believe photosynthesis
5 0
3 years ago
PLEASE HELP EMERGENCY!! IF YOU ARE NOT 100% SURE ABOUT YOUR ANSWER DO NOT ANSWER THEN!! PLEASE!!
Doss [256]

Cellular Respiration

Explanation:

For something to be living it doesn't need to be a cell or do photosynthesis. Cellular Respiration is the process by which organisms combine oxygen with foodstuff molecules, diverting the chemical energy in these substances into life-sustaining activities

6 0
2 years ago
Read 2 more answers
What makes an experiment a controlled experiment?
icang [17]
D: All the variables are controlled except one.
3 0
1 year ago
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