Which of the following is TRUE at the end of
telophase I in corn (20 chromosomes)?
a. Each cell has 10 chromosomes.
b. Each chromosome is double-stranded.
c. Centromeres connect sister chromatids.
d. Each cell has 10 chromosomes, and each
chromosome is double-stranded.
e. Each cell has 10 chromosomes, each
chromosome is double-stranded, and
centromeres connect sister chromatids.
Answer: e
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The coelom forms in two different ways. Which of the following statements best compares those ways?
A. In schizocoelous development a solid mass of mesoderm splits to form the coelom whereas in enterocoelous development a layer of mesoderm cells forms a pocket off of the developing gut to form the coelom. B. In enterocoelous development a solid mass of mesoderm splits to form the coelom whereas in schizocoelous development a layer of mesoderm cells forms a pocket off of the developing gut to form the coelom. C. In enterocoelous development the coelom forms inside the mesoderm whereas in schizocoelous development the coelom forms on the outside of the mesoderm. D. In schizocoelous development the coelom forms within the mesoderm whereas in enterocoelous development, no coelom is formed at all. E. Schizocoelous and enterocoelous both form the coelom in identical ways, the difference merely being that the term schizocoelous is used only for deuterostomes and enterocoelous is used only for protostomes.
In most cases, cancer-causing mutations ____
a. accumulate over a number of years b. accumulate very quickly within a single cell c. metastasize within a short time d. must all occur on the q arm of a chromosome e. occur during the G0 phase of the cell cycle
Introduction of nonnative marine species often occurs through release of ballast water in ports of call
Indicate whether the statement is true or false
Information that takes the form of a testimonial is considered to be ________ evidence, not scientific evidence because it is not based on empirical evidence
Fill in the blank(s) with correct word