The seeds of angiosperms develop within
A. cones.
B. cotyledons.
C. petals.
D. ovaries.
Ans: D. ovaries.
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The master gene Hox helps to sculpt the body plan of embryos by ____
a. inhibiting the Dlx gene to prevent extra limbs b. timing the activation of Dlx genes c. causing cell death in any cell not expressing the Hox gene d. converting sugar into energy to allow the process to go to completion e. inducing mutations in plants
Which of the following pollutants is generally stored in dry locations because they remain a potential problem for thousands of years?
A) radioactive waste B) PANs (peroxyacyl nitrates) C) CFCs D) heavy metals E) gasoline and oil
Which of these viruses can incorporate the molecule serving as mRNA into its capsid?
a. Picornavirus b. Rhabdovirus c. Herpesvirus d. Poxvirus
A declining population is indicated by
a. A. b. B. c. C. d. D. e. none of these.