The rate of eukaryotic transcription after initiation is increased by:
a. upstream promoter elements.
b. the order of gene arrangement in operons.
c. the action of catabolite activator proteins.
d. how fast 5’ caps and 3’ tails can be added to pre-mRNA.
e. enhancers.
e
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What is an effect of continental drift on biological species?
a. It results in mass extinctions. b. Over time, an organism adapted to a particular climate may find it difficult to survive in the climate change associated with continental drift. c. Continental drift led to the evolution of humans. d. Continental drift limits our view of natural selection. e. It limits diversification of biological species.
How must spindle microtubules attach to chromosomes during anaphase of meiosis I?
A. Microtubules only attach to one
kinetochore per homologous pair.
B. Microtubules attach to the chiasma.
C. Microtubules attach using their minus
(slow growing) ends.
D. Microtubules attach at the centrosomes.
Answer the following questions true (T) or false (F)
1. The pod of a pea plant represents a fruit produced by the plant. 2. The brain is responsible for essentially all homeostasis. 3. The heart is in the thoracic cavity.
Which of the following describes the earliest
protist found in the fossil record?
a. single-celled, free-swimming, asexual reproduction, red alga b. multi-celled, stationary, asexual reproduction, red alga c. multi-celled, free swimming, sexual reproduction, red alga d. multi-celled, stationary, sexual reproduction, red alga e. single-celled, stationary, asexual reproduction, red alga