When the Bicoid protein is expressed in Drosophila, divisions between cells in the embryo are not yet fully developed. This helps to explain that (B) Bicoid protein diffuses throughout the embryo in a concentration gradient.
Bicoid protein acts as a morphogen. This means it shows its effect when the concentration gradient is high. Also abbreviated as Bcd, the protein helps in establishing the anterior and posterior region of the Drosophila. It also represses the translation of caudal mRNA.
Embryo is the initial stage of a microorganism, right after the fertilization. In vertebrates, this stage does not last much longer because the development of organs begins.
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Answer:
A
Explanation:
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Competition
- when space is full pack organisms compete for resources and the sooner the
resources are gone. Predation - organisms feed on and kill animals lowering
their population growth and the prey population growth, same as herbivore and
human prey. Disease - again feeds on hosts. Stress from overcrowding - females
could kill offspring. Hurricanes (density-independent limiting factors).
