Which of the following organisms has the simplest digestive system?
a. earthworm
b. jellyfish
c. grasshopper
d. clam
e. more than one of these organisms has the
simplest digestive system
B
You might also like to view...
How could you tell the difference between a brachiopod and a clam?
a. brachiopod is sessile, clam is not b. brachiopod has two valves, clam does not c. brachiopod has a fleshy stalk (pedicel), clam does not d. brachiopod is a filter feeder, clam is not
In what way can defective transportable elements alter genomes even if they cannot mobilize? (Select all that apply.)
A) Crossing-over between transportable elements on the same chromosome can result in a deletion or an inversion. B) Crossing-over between transportable elements on non homologous chromosomes can result in a reciprocal translocation. C) Genes located between two transportable elements could be moved to a non homologous chromosome. D) Proteins produced by the defective transposable elements introduce point mutations in other areas of the genome.
Which of the following hormones stimulates the release of a future egg cell by the ovaries?
A) luteinizing B) follicle-stimulating C) oxytocin D) prolactin
What must occur for bacterial conjugation to take place?
a. The cells must come into contact with each other. b. Each cell must contain a plasmid. c. One of the cells must be E. coli. d. The cells must transfer RNA.