Why are conifers and cycads considered gymnosperms?
A. The pollen is wind-dispersed.
B. The fruit is not fleshy.
C. Pollination and fertilization occur at different times.
D. The female gametophyte is not completely enclosed in sporophyte tissue at the time of pollination.
E. They have true vascular tissue but do not form seeds.
Answer: D
You might also like to view...
Approximately _____ percent of human births in the U.S. are the result of in vitro fertilization
a. 0.5 b. 1.5 c. 5 d. 10 e. 25
The only marsupial mammal living in North America is the
A. raccoon. B. wombat. C. weasel. D. opossum. E. ring-tailed cat.
The immunity of some black Africans to malaria is probably due to their
A. general health. B. cultural practices. C. age. D. genetic background.
What does the primary structure of a protein refer to?
A.) the locations of the protein's alpha helices and beta sheets B.) the structure that forms first as the protein folds into its most stable form C.) the locations of the peptide bonds that form the protein's backbone D.) the linear amino acid sequence of the protein E.)the overall 3D shape of the protein