In echinoderms, gastrulation takes place through a(n) primitive groove. Indicate whether the statement is true or false
False - blastopore
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The visceral mass of molluscs does not contain the
a. circulatory system. b. excretory system. c. nervous system. d. head-foot. e. digestive system.
Consider this anomaly in daughter cells: One meiotic nucleus has two copies of a chromosome, and the other daughter cells does not have a copy of that chromosome. What caused this situation?
a. a centromere did not divide in metaphase I b. a centromere did not divide in anaphase II c. a centromere did not divide during telophase I d. a centromere did not divide during prophase II
Embryonic stem cells are pluripotent, able to ____
a. divide an unlimited amount of times b. give rise to most, but not all body cell types c. give rise to any of the body cell types d. divide a limited amount of times e. give rise to different, unique individuals
Classification. Respond to the following statements in reference to the four kinds of receptors listed below.
A. Receptors on the tongue detect variations in this kind of signal. B. Ears detect this kind of energy. C. The warmth you feel from a campfire detected by this receptor. D. Receptors that detect tissue damage.