Answer:
C. growth of plants after a forest is destroyed by fire
Explanation:
When the ecological succession occurs on the land or region which was never inhabited by plants previously, the process is called primary succession. On the other hand, secondary succession occurs on land where the existing vegetation was destroyed by some disturbances. Secondary succession is a fast process compared to the primary succession as the soil is already present to support the growth of plants.
Among the given examples, the growth of plants after the vegetation of forest was destroyed by fire represents the process of secondary succession. Growth of vegetation on bare rocks, in the cracks in the concrete surface, or after the melting of glaciers represents the process of primary succession.
Answer:
hope this helped!
Explanation:
19) I think the cell is eukaryotic because of it's shape
20) Prophase (added an image with more information)
21) There are 12 chromatids and 6 chromosomes present (chromatids are 1 of the of two identical halves of a replicated chromosome)
22) I think there will be 3 chromones present in each of the new cells after the cell divides (because it separates equally and half of 6 is 3)
Answer:
be genotypically different
Explanation:
- Widow's peak is an example of a dominantly inherited trait, this means that any individual who receives even a single copy of the dominant allele would have a widow's peak present in the phenotype.
- In the given question, the cross is made between a homozygous dominant individual (let the genotype be WW) and a heterozygote (Genotype Ww).
- The cross can be represented as follows :
WW X Ww ----> WW Ww Ww WW
From the cross it can be seen that the<em> offsprings will have the genotype of either WW or Ww</em>, however, since W is dominant over w, the phenotype will always be the presence of widow's peak.
The correct answer is (C) Genetically modified crops requires less pesticide.
The genetically modified crops are designed in such a way that it requires less amount of pesticide. These plants contain the gene resistant for pest. These plants are often called as Bt plants. Almost 40% of the maize crops used in United States are genetically modified crops. All these are pest resistant and require very small amount of pesticide to kill some of the pest.
The first option is correct:
When the bacterium reproduces, it passes the gene for human insulin to its offspring. The offspring form a colony of bacteria that contain the gene for human insulin, which can then be used to produce insulin for a person with diabetes
