What is the general trend in diversity in vascular plants for the past 145 million years?
What will be an ideal response?
The approximate number of species has increased in the past 145 million years. Angiosperm species
became dominant between 65 and 23 million years ago. The proportion of all other groups of vascular
plants has declined as the diversity of angiosperms increased.
You might also like to view...
Individuals with a vitamin ____ deficiency may develop ____
a. A; bone softening b. D; night blindness c. C; increased blood clotting time d. E; neuromuscularproblems e. K; fatigue
What is a noncoding, repetitive DNA sequence at the end of chromosomes?
a. telomere b. guanine cap c. transposons d. telomerase e. tandem repeats
Why is DNA able to store large amounts of information?
a. It contains a large number of different nucleotides. b. Its nucleotides can be arranged in a large number of possible sequences. c. It is capable of assuming a wide variety of shapes. d. The sugar and phosphates can be arranged in many different sequences. e. The nucleotides can be altered to form many different letters in the sequence.
One of the advantages of STR profiling over VNTR profiling is that ________
A) STRs are variable in the number of repeats, whereas VNTRs are not B) it presents more variable sequences reducing false positive matches C) STRs are not variable in the number of repeats, whereas VNTRs are D) it requires much less DNA because PCR can be used to amplify small samples