After replication, chromosomes consist of how many molecules of DNA (assuming one chromatid is equal to one molecule of DNA)?
What will be an ideal response?
two
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Suppose you discover a new species of worm that exists in two forms—slimy and nonslimy. You find that mating slimy females to nonslimy males produces offspring consisting of slimy males and nonslimy females, whereas mating nonslimy females with slimy males produces offspring of both sexes that are all slimy. You would conclude that the ________ allele is dominant and that ________ are the heterogametic sex (the sex with two different sex chromosomes) in this species of worm.
A) slimy; females B) slimy; males C) nonslimy; females D) nonslimy; males
The letter "A" in the accompanying figure represents the ____ plane
a. transverse b. radial c. tangential d. elliptical e. obtuse
Mitochondria in eukaryotic cells contain ribosomes that are structurally similar to those found in prokaryotic cells.
a. true b. false
Which of the following is true concerning homeostasis?
A) Homeostasis is the maintenance of a rigid internal environment with no variation. B) Homeostasis allows for major fluctuations in body conditions. C) The maintenance of homeostasis relies mainly on positive feedback. D) Homeostasis is the maintenance of a relatively stable internal environment.