When we say an animal has an "open circulatory system," this means that:
A) movement of the animal is solely responsible for moving circulatory fluid.
B) there are no vessels–blood simply fills all spaces inside the coelom.
C) a small amount of blood may leak out of vessels.
D) blood flows out of vessels and into spaces or sinuses.
E) the animal has a single-chambered heart, so blood mixes from all areas.
Answer: D
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Which of the following is incorrectly paired?
A) intrauterine insemination; donated sperm is placed in the woman's reproductive tract B) in vitro fertilization; fertilization occurs in a laboratory dish C) ICSI; DNA from an immobile sperm is injected into an oocyte D) GIFT; fertilization occurs in a laboratory dish
What structures will attach your chromosomes to the spindle fibers?
a. Cleavage furrows b. Contractile ring c. Centrioles d. Actin filaments e. Microtubules
In a karyotype, the chromosomes are arranged in order from
A. largest to smallest, including the sex chromosomes. B. largest to smallest, with the sex chromosomes at the end. C. smallest to largest, including the sex chromosomes. D. sex chromosomes first and then smallest to the largest. E. smallest to largest, with the sex chromosomes at the end.
Which of the following processes is one of sexual reproduction?
a. fission b. fertilization c. budding d. fragmentation