The event that triggers fruit formation is the growth of a pollen tube through the carpel of a flower. Identify a reasonable hypothesis about the basis of this effect
A) Pollen tubes grow in response to a cytokinin produced by the carpel.
B) Pollen tubes grow in response to abscisic acid.
C) The growing pollen tube produces ethylene.
D) The growing pollen tube produces auxins and/or gibberellins.
Answer: D
You might also like to view...
An organism that requires at least 1.5 M NaCl in order to grow is referred to as a(n) ________.
A. barophile B. sodiophile C. facultative halophile D. extreme halophile
Synovial joints are held together by
a. muscle fibers. b. sarcomeres. c. tendons. d. ligaments. e. myofibrils.
What mineral is found in horsetails that help
protect it from insects?
a. siderite b. aluminum c. silica d. feldspar e. amethyst
Buds are produced
a. in the axils of leaves. b. at the very ends of stems. c. at the nodes. d. by the apical meristem. e. at all of these areas