Animals gather information using specialized cells called
a) blastula
b) nodes
c) stimuli
d) receptors
Ans: d) receptors
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The euglenoids are characterized by the disc-shaped cristae of their chloroplasts
Indicate whether the statement is true or false.
In mice, the allele for colored fur (C) is dominant to the allele for albinism (c). The allele (W) for
normal behavior is dominant to that for waltzing movement (w). Give the probable genotypes of the parents if they produced the offspring listed after the following crosses: (a) Colored normal ? white waltzer produced 10 colored normal, 8 colored waltzers, 2 white waltzers, and 11 white normal. (b) Colored normal ? white normal produced 35 colored normal and 13 colored waltzers. (c) Colored normal ? colored normal produced 37 colored normal, 14 colored waltzers, 9 white normal, and 5 white waltzers. What will be an ideal response?
Three of the four modes of inheritance of organelle genes are • maternal inheritance as in mammals, • paternal inheritance as in gymnosperms, and • selective degradation of one source during mating. What is the fourth?
What will be an ideal response?
Sperm cells are moved out of the testes in the
A. seminiferous tubules. B. fallopian tubes. C. cervical canal. D. vas deferens.