Which vertebrate organ filters blood, adjust its composition, and produces urine?
a. nephridium
b. Malpighian tube
c. kidney
d. liver
e. bladder
c
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Can a woman with blood type A have a child with blood type O with a man who is AB?
A) Yes, because of codominance between the IA and IB alleles. B) No, because a man with type AB blood could not contribute an i allele. C) Yes, because of epistasis between the I and the H genes. D) No, because the child's genotype must be ii.
Chemosynthesis is less efficient than photosynthesis
Indicate whether the statement is true or false
The sternum is a major site of red blood cell
formation. The bones in the sternum must be ___ bones.
a. compact b. spongy c. cartilaginous d. fibrous e. synovial
What is the leading hypothesis for what might have brought about the extinction of the dinosaurs?
A) A new disease B) Competition from mammals C) An asteroid impact D) Massive volcano eruptions