In stage 1 of photosynthesis, a proton gradient is generated and ATP is synthesized. Where do protons become concentrated in the chloroplast?
(a) thylakoid space
(b) stroma
(c) inner membrane
(d) thylakoid membrane
(a)
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What phenomenon would violate the conditions for Hardy-Weinberg equilibrium?
A. The population is isolated from other populations. B. Females select males based on secondary sex traits. C. The population is large. D. No genotypes within the population have a reproductive advantage. E. Genetic drift within the population does not change allele frequencies.
The most obvious characteristic of annelids is the repeated segments that make up their bodies. They also have a complete digestive system, and a coelom. Which of the following is true of an annelid?
A. They have cephalization and an open circulatory system. B. Their gut is separated from their body wall. C. They have cephalization. D. Their gut is separated from their body wall and they have cephalization. E. They have an open circulatory system.
A(n) ____________________ is a tally of the number of cells in a microliter of blood. Fill in the blank(s) with the appropriate word(s)
The heritability of a trait is the ____
a. sum of all phenotypic variation in a population b. average amount of genetic variation in each individual c. proportion of phenotypic variation that is caused by different genotypes d. absolute measurement of genotypic variation in a population e. proportion of phenotypic variation that is caused by the environment