Which hominin was the first to leave Africa? (hint: make sure to know why the others are important as well)
A. Neandertals
B. Homo erectus
C. Australopithecus afarensis
D. Homo habilis
Answer: B. Homo erectus
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For a lady bug population at the beginning of summer, the food supply and habitat are almost limitless. If there are 1,000 lady bugs in a one-acre field, the per capita rate of increase is 25%, and no immigration or emigration occurs, how many individuals will be added in the next generation? Discern whether G = rN(K – N)/K or G = rN applies appropriately.
A. 1,250 B. 1,000 C. 250 D. 0 E. 125
The aorta leaves the
a. left atrium. b. right atrium. c. left ventricle. d. right ventricle. e. pulmonary trunk.
Topic 2.10 - Terrestrial microbes
What will be an ideal response?
The table below lists several genotypes associated with the lac operon in E. coli. For each, indicate with a "+" or a "-" whether ?-galactosidase would be expected to be produced at induced levels
?-Galactosidase Production Genotype No Lactose With Lactose (a) I + O+ Z+/F' I - O+ Z+ (b) I - Oc Z -/F' I - Oc Z - (c) I - Oc Z+/F' I - O+ Z+ (d) I s Oc Z -/F' I s O+ Z+ I + = wild-type repressor I - = mutant repressor (unable to bind to the operator) I s = mutant repressor (insensitive to lactose) O+ = wild-type operator Oc = constitutive operator (insensitive to repressor)