When an outgrowth forms on the tubular body of a hydra and eventually separates and grows into adulthood, this is an example of
a. budding.
b. fission.
c. organogenesis.
d. parthenogenesis.
a. budding.
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The area within the neuron where stimuli are summed is called the:
A. dendrite. B. cell body. C. axon terminal. D. axon hillcock. E. synapse.
Recombination is defined as the:
a. change of the bacterial genotypes through the exchange of DNA from one cell to another. b. internal change in the original nucleotide sequence of a gene or genes within an or-ganism's genome. c. process by which genetic elements such as plasmids and transposons excise from one genomic location and insert into another. d. uptake of free DNA from the environment and recombination with the recipient's homologous DNA.
Among air breathing animals, birds have the most effective mechanism of extracting oxygen from air because ____
a. birds utilize crosscurrent exchange b. bird lungs have more surface area c. bird lungs are the largest among vertebrates d. the air sacs provide additional respiratory surfaces
e. birds utilize positive force exchangeWhen the chromosome is most condensed, which
of the following is true? a. Proteins are used to wind up the DNA. b. They are less susceptible to radiation. c. Lipid droplets form “beads on a string.” d. Carbohydrates wind the DNA into clusters. e. None of these are true.