Following double fertilization, the ovule develops into __________, and the ovary develops into
__________.
a. a cotyledon; an embryo
b. an embryo; a seed
c. a seed; a fruit
d. a fruit; a seed
e. an endosperm; an embryo
C
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Is there an "optimum" beak size for finches?
a) No, beak size in finches appears to be dependent on the amount of rainfall. b) Yes, sexual selection always selects for the largest beak size. c) Yes, larger beaks are always better for finches. d) Yes, smaller beaks are always better for finches. e) No, beak size stays the same, regardless of environmental factors.
The anaerobe Clostridium difficule is controlled in low numbers in the large intestine by the resident microbiota. After a course of antibiotics it may multiple and cause disease. This is called
a. Parasitic infection b. Mutualistic infection c. Exogenous infection d. Opportunistic infection
The dorsal root ganglia of the spinal cord contain cell bodies of ________ neurons
Fill in the blank(s) with correct word
©McGraw-Hill EducationBased on the phylogeny shown, which species is not a tree but has seeds?
A. pine B. Psaronius C. rose D. ginkgo E. fern F. oak