All of the following are examples of symbiotic relationships except
A. algae and fungi living together as a lichen.
B. the protozoa that live in the intestine of termites and digest cellulose that termites cannot digest.
C. the mosquito that visits a mammal for a blood meal.
D. the malaria parasite that lives in the liver of humans.
C. the mosquito that visits a mammal for a blood meal.
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Which of the following is heterosporous?
a. whisk fern b. spike moss c. horsetail d. liverwort e. hornwort
The vertebrate forelimb initially develops in the embryo as a solid mass of tissue. As development progresses, the solid mass near the end of the forelimb is remodeled into individual digits. Which of the following best explains the role of apoptosis in remodeling of the forelimb?
A) Apoptosis replaces old cells with new ones that are less likely to contain mutations. B) Apoptosis involves the regulated activation of proteins in specific cells of the developing forelimb that leads to the death of those cells. C) Apoptosis involves the destruction of extra cells in the developing forelimb, which provides nutrients for phagocytic cells. D) Apoptosis in the developing forelimb triggers the differentiation of cells whose fate was not already determined.
__________ is a diagnostic tool that reveals missing or extra chromosomes and some structural changes in an individual's chromosomes.
Fill in the blank(s) with the appropriate word(s).
Alberto had a bad bump on his leg, so he went to see the doctor about it. The physician diagnosed it as a blood clot and said that blood clots can float away into the circulation. One of these floaters is called a(n) ________
A) embolus B) prothrombin C) formed element D) platelet plug