Answer:
During platelet plug formation, platelets begin to stick to: collagen with the assistance of von Willebrand factor. As a platelet plug forms at an injury site platelets become activated and their cytoplasm: degranulates as they release chemicals such as ADP and thromboxane A2.
Explanation:
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The stars that is very dim and red is called Red Dwarfs.
Considering the following;
I. Heat is not readily available to all living cells.
II. Heat at excessive amounts denatures proteins.
III. Heat does not provide the activation energy for their reactions.
IV. When a critical temperature is reached, proteins no longer function
Answer;
I and IV
Explanation;
Living cells cannot use heat to provide the activation energy for biochemical reactions because heat is not readily available to all living cells and also when a critical temperature is reached, proteins no longer function.
Too much heat can kill an organism by rendering its organelles, cells, tissues and organs permanently inoperable and un-salvageable. The same process can be observed in tissues at low temperatures, and is the cause of frostbite. This is because enzymes are denatured by high temperature and inactivated by low.
The True statements are.
Organisms in a population must compete for the resources as the resources are limited and the organism that compete and survives wins.
The best equipped organism survive which is known as the survival of the fittest.
Over the time due to challenges in the environment the beneficial variation takes place in the organisms and it spreads through the generations and then it gradually changes the whole population.
The false statement is Organism of the same species are equipped with the same survival skills.
The organism of the same species have some variation and because of this variation they compete and win against the other member of the same species.
