In order to be considered extinct, a species can't be found
A) at all, in the wild or in captivity at the present time.
B) at all, presently or during the past 10 years.
C) at all, presently or during the past 50 years.
D) in the wild presently but may exist in captivity.
C
You might also like to view...
Which of the following enzymes is responsible for joining Okazaki fragments together?
A. ligase B. DNA polymerase C. primase D. helicase E. topoisomerase
Which of the following are the fundamental embryonic tissues called the "germ layers"?
A. tissues, organs, and organ systems B. mesoderm, muscle, and tissue C. ectoderm, endoderm, and exoskeleton D. mesoderm, endoderm, and ectoderm E. mesoderm, exoderm, and hydroderm
RNA molecules are usually found as
a. a two-stranded double helix. b. a single strand with some folds and twists where the strand bonds with itself to make some double-helical regions. c. part of a pair with a single DNA strand. d. a single strand that has no double-helical regions. e. an extra strand joined to a DNA double helix.
Suppose that you have discovered a new mutant in Drosophila melanogaster. What kinds of genetic crosses should you do to determine if the allele causing the mutation is inherited as an autosomal dominant trait, an autosomal recessive trait, or a sex-linked trait?
What will be an ideal response?