Which one of the following is true of the sporophyte stage of a flowering plant?
A. It is dependent on the gametophyte for nutrition.
B. It is haploid.
C. It is a nonphotosynthetic stage.
D. It is the obvious stage, for example an oak tree.
Answer: D
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Translation ends when a stop codon in the ____ site allows a ____ to bind there
a. P; release factor b. A; terminator tRNA c. E; terminator tRNA d. A; release factor e. P; terminator tRNA
Synthetic compounds similar to ____ are used to prolong the shelf life of vegetables such as lettuces and mushrooms
and to keep cut flowers fresh.
a. salicylic acid b. jasmonates
c. abscisic acid d. gibberellins e. cytokinins
Which feature is unique to echinoderms?
a. Water-vascular system b. Radial symmetry c. Cephalothorax d. Ability to regenerate body parts e. Bilateral symmetry
Fruit develops from the
A. anther. B. ovary. C. stems. D. stigma. E. leaves.