In plants and animals, the zygote develops by which of the following processes?
A. mitosis
B. meiosis
C. syngamy
D. synapsis
E. reduction division
A. mitosis
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The origin of a skeletal muscle is
(a) attached to the less mobile portion of the skeleton. (b) attached to the portion of the skeleton that moves when the muscle contracts. (c) never attached to the skeleton. (d) its belly.
Intracytoplasmic sperm injection (ICSI) is used by couples in which the _____
a. female has blocked oviducts b. female has very irregular ovulation c. female is approaching menopause d. source of sperm is a sperm bank e. male is infertile
Filamentous organisms such as Sphaerotilus and Thiothrix can lower the efficiency of activated sludge processes by causing ________.
A. building sludge B. acidified sludge C. bulking sludge D. anaerobic sludge
Which of the following statements would be LEAST acceptable to most zoologists?
A) The first fossils resembling lancelets appeared in the fossil record around 530 million years ago. B) Recent work in molecular systematics supports the hypothesis that lancelets are the basal clade of chordates. C) The extant lancelets are the immediate ancestors of the fishes. D) Lancelets display the same method of swimming as do fishes.