Answer:
b. causes constriction of cerebral blood vessels in response to a drop in systemic blood pressure
Explanation:
No matter what happens or fluctuations occur in the blood pressure of body the blood pressure to the brain is always kept constant by the necessary changes and means possible. The blood value is always maintained at 50mL per 100g of Brain Tissue. The constriction of blood vessel keep the blood pressure normal to the brain in case of low blood pressure. Otherwise, it can have deadly consequences.
There are basically three types of evolution divergent, convergent and parallel evolution.
a) Divergent Evolution – As the name depicts the species in this form of evolution becomes divergent i.e they evolve to become different from each other. This form of evolution is responsible for the current diversity of organisms existing on planet earth. For example human and apes evolved from a common primate ancestor.
b) Convergent Evolution – In this evolution, different species of organisms living in a similar biosphere start share common traits in the form of analogous features. For example – Whale and fish are not closely related species but they both have fins which are different in structure but have the same function.
c) Parallel evolution – In this evolution the similar characteristics between the two set of organisms are maintained though the two species continue evolving separately. For example - marsupial mammals of Australia and the Placental mammals
Pistil T<u>he female organs of a flower where the ovules are.</u>
Sepal<u> Protects the flower </u>or encase the developing flower.
Anther <u>The name for the male part of the flower</u>
Filament <u>Holds up the anther</u>
Stamen <u>Creates the pollen and sends to the stigma </u>
Petal <u>Attracts pollinators</u>
Ovary <u>Holds up the stigma </u>
Ovule <u>Contains the embryo </u>
Stigma <u>The sticky part of the flower that collects pollen </u>
Style <u>Female part of the flower </u>
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<em>I hope this helps..... i tryed my best!</em>
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<span>water is relatively resistant to an increase in temperature.</span>
They'll have to do the following 2 stpes:
- Look for evidence that suports their conclusion
- Do tests in order to prove their hypothesis
Hope it helped,
BioTeacher101