Answer the following statements true (T) or false (F)
1. The outgroup in this cladogram of vertebrate animals is the amphibians.
2. Mammals diverged from a common ancestor of all of these vertebrates more recently than crocodiles diverged from a common ancestor of birds.
3. Lizards and mammals are proposed in this cladogram to be more closely related than lizards and birds.
4. A biological species is defined as a population whose members can interbreed.
5. Today, scientists can deduce evolutionary relationships by DNA sequence analysis.
1.TRUE
2.FALSE
3.FALSE
4.TRUE
5.TRUE
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Telomerases are important in the replication of linear chromosomes because there is no ________ at the ends of the lagging strands.
Fill in the blank(s) with the appropriate word(s).
If you wanted to cause the extinction of an entire phylum, you would need to kill every cycad.
Indicate whether the statement is true or false.
How might blocking angiogenesis have a negative impact as a cancer treatment?
a) by creating a higher oxygen tension in the tissue b) by concentrating tumor cells at a particular location in the body c) by creating a more O2-deficient environment for the tumor cells d) by driving tumor cells to seek out other sites in the body
Some species of cuckoos lay their eggs in the nest of other birds, forcing the other bird to raise the young of the cuckoo. This would be a type of ________.
a) parasitism b) predation c) commensalism d) mutualism