Where does the primary uptake of water and mineral ions from the soil occur?
a. in the root hairs
b. in the pericycle
c. in the endodermis
d. in the quiescent centre
Ans: a. in the root hairs
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Eukaryotic flagella differ from bacterial flagella because only eukaryotic flagella
A. are long, whip-like structures. B. facilitate phototaxis. C. facilitate chemotaxis. D. contain microtubules. E. are used for cell motility.
Poriferans are
a. herbivores. b. filter feeders. c. scavengers. d. predators. e. carnivores.
What is the result of the insertion or deletion of a single base in the coding sequence?
a. frameshift b. an unidentified reading frame c. a new open reading frame d. a silent mutation e. a neutral mutation
With a decreasing distance between two genes on a chromosome, the probability of a recombination event is __________
a. increased b. guaranteed c. reduced d. no more likely or less likely e. Both a and b