A very rudimentary “brain” found in flatworms consists of a collection of neurons that
integrate information called __________.
a. ganglia
b. a spinal cord
c. a nerve net
d. interneurons
A
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Respiratory acidosis results when ____ are produced more rapidly than they are removed
a. oxygen molecules b. carbon dioxide molecules c. chloride ions
d. hydrogen ions e. carbonic anhydrase molecules
Based on von Frisch's work on honeybee communication, which type of information is communicated to other workers by a honeybee's "dance"?
A) the direction of the nectar source B) the distance of the nectar source from the nearest water C) the color of the flowers producing the nectar D) the quality of the nectar
In Drosophila, the allele red eyes (bw+) is dominant to the allele for brown eyes (bw). At another gene locus on the same chromosome, the allele for thin wing veins (hv+) is dominant to the allele for heavy wing veins (hv). Flies homozygous for bw and hv+ are crossed to flies homozygous for bw+ and hv to obtain doubly heterozygous F1 progeny.What would be the results of a test cross with the F1 flies?
A. 1 brown eye, thin wing veins: 1 red eye, heavy wing veins B. 1 brown eye, heavy wing veins: 2 red eye, thin wing veins: 1 red eye, thin wing veins C. 1 brown eye, thin wing veins: 2 red eye, thin wing veins: 1 red eye, heavy wing veins D. 1 brown eye, heavy wing veins: 1 red eye, thin wing veins
What happens to chromosomes in cells in which the telomerase gene is not expressed or is mutated?
What will be an ideal response?