Sponges move huge volumes of water through their bodies every day
Although this serves
the function of filter feeding for the organism, how might this also provide an "ecosystem"
service (something that affects and/or benefits other organisms in their environment)?
A. They can filter small poisonous fish out of
the water that may harm other organisms.
B. They create small currents in their
microenvironment that help to circulate and
clean water locally for other organisms.
C. They produce large numbers of gametes
that will become food for other sponges.d.
Their body chambers serve as places where
smaller organisms can live and be protected
from certain predators.
B
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Your father has type B blood, and your mother has type O blood. You learn that you also have blood type O. What
does this tell you?
a. You father is homozygous for type B blood. b. Your mother is heterozygous for type O blood. c. Your father's genotype is IBi and your mother's genotype is ii. d. Your father's genotype is IBIB and your mother's genotype is ii. e. Your father's genotype is IAIB and your mother's genotype is ii.
During the luteal phase, a __________ forms from cells that surrounded the egg. Fill in the blank(s) with the appropriate word(s)
Which is true?
-The pineal gland, located within the brain's two hemispheres, receives signals from the SCN and decreases production of the hormone melatonin, which helps put you to sleep once the lights go down. -The pineal gland, located within the brain's two hemispheres, receives signals from the SCN and increases production of the hormone GABA, which helps put you to sleep once the lights go down. -The pineal gland also governs functions that are synchronized with the sleep/wake cycle, including body temperature, hormone secretion, urine production, and changes in blood pressure. -The pineal gland rests in a part of the brain called the hypothalamus, just above the point where the optic nerves cross. Light that reaches photoreceptors in the retina (a tissue at the back of the eye) creates signals that travel along the optic nerve to the pineal gland.
What is not a function of parathyroid hormone?
A. It increases reabsorption of Ca2+ in the kidney. B. It increases calcium absorption across the intestine. C. It increases calcium production in the liver. D. It stimulates osteoclasts to dissolve calcium phosphate crystals in bone.