Cnidarians capture their prey with the use of
(a) poison claws.
(b) nematocysts.
(c) oral teeth.
(d) pedal disks.
(b) nematocysts.
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How many different types of chemoreceptors can be found in the taste buds?
A. hundreds B. thousands C. 40-50 D. five
In a phototropism, auxin moves to the ___ side
of the stem and causes cell ___.
a. shade--elongation b. sun--elongation c. sun--division d. shade--division e. shade--apotosis
There is a color pattern inherited in certain mice in which agouti (gray) is homozygous, and yellow is
heterozygous. A cross of two yellows produces two yellows for each agouti. A second gene, C/c, controls the expression of the color genes: C is the dominant allele that allows color to be expressed, and the recessive gene in the homozygous condition (cc) prevents any color from being expressed. (a) Give the genotypes of a white parent crossed with a yellow parent that produces 1/2 white, 1/3 yellow, 1/6 agouti offspring. (b) Give the results of the cross of two forms heterozygous for each gene. (c) Can you develop a pure-breed population for any of the colors? What will be an ideal response?
Drosophila developmental mutants of __________ genes produce larvae with mirror image segments
a. gap b. pair-rule c. segmentation d. paternal effect e. segment polarity