Answer:
Everyone has many questions regarding the extinction of dinosaurs. Some of the questions that can support an explanation for their extinction are as follows:
- What were the environmental conditions responsible for the extinction of dinosaurs?
- How did dinosaurs get extinct even having vast variation in the species?
- Why did not dinosaurs able to follow Mendel's law of adaptation?
- How did people found about the dinosaurs as they were already extinct?
The offspring must have one gene from each parent. To find the possible genes for all offspring, list all possible combinations that have a gene from each parent:
(Rr) | (rr)
R | r
R | r
r | r
r | r
The question asks for the probability of the offspring having rr genes. There are 2 offspring that have these genes out of the 4 created. Divide 2 by 4, then multiply by 100:
There is a
50% chance of the offspring having wrinkled seeds.
Answer:
A. Puffins receive energy from herring, herring receive energy from krill, and krill receive energy from phytoplankton.
Explanation:
A food chain represents the unidirectional network or path of the flow of energy and the matter in an ecosystem.
The aquatic food chain begins from the small or microscopic organisms called phytoplankton which is autotrophic therefore are considered the producers.
The phytoplanktons are eaten by a variety of other organisms in which the krills which live in the deep sea feeds on these phytoplanktons. The krills are the primary consumers who are eaten by small fish like herring which acts as secondary consumers. These herring are then eaten by the bird-like puffins and large fish which acts as tertiary consumers.
Thus, Option-A is the correct answer.
Enzymes are biological catalysts which increase the rate of biochemical reactions without undergoing any change themselves. They bind with the substrate to form a enzyme substrate complex leding to the formation of product releasing free enzyme.
Enzymes have an optimum pH at which they show their maximum activity. Any change in the pH effects the enzyme and the enzymatic reaction. Most of the enzymes are functional at the neutral pH of 7 in the cell cytoplasm with a few exceptions. An acidic environment in the cell, changes the tertiary structure of the enzymes and the bonds of the enzymes are weakened. Thus, preventing the substrate binding to the active site of the enzyme and inhibiting catalysis. This is due to the change in the structure of the active site leading to the lack of electrostatic attraction between the enzyme and the substrate.
A movement of alleles resulting from migration. I hope I helped