b. Secondary succession begins on soil and primary succession begins on bare rock
c. Primary succession begins when a natural disaster disturbs an ecosystem and secondary succession does not
d. Secondary succession begins with pioneer species such as lichens, and primary succession begins with shrubs and grasses
Answer:
b. Secondary succession begins on soil and primary succession begins on bare rock
Explanation:
took test :)
B) molecular homology (comparing DNA)
C) identifying and comparing homologous structures
D) comparative embryology (comparing embryonic development)
Answer: The correct answer is -
B) molecular homology (comparing DNA).
DNA (deoxyribonucleic acid) is considered as the genetic material of living organisms, which is passed from one generation to the next generation that is from parents to their offspring.
By comparing the DNA sequence of two organisms (molecular homology), we can determine whether they are closely related or not.
If two organisms share genetic relatedness that is similarity in their DNA sequence, they are considered to be closely related.
Thus, option B) is the right answer.
b. norovirus within green salad can create a disease outbreak.
c. viruses grow via food.
d. viruses can be introduced into food from food workers.
B. Both of these cell types contain a nucleus.
C. Both of these cell types contain genetic material.
D. Prokaryotes always have a nucleus, but eukaryotes don't.
c. solutes to move into the cell.
b. water to move out of the cell.
d. solutes to move out of the cell