Which impact is occurring due to global climate change?
a. Sea level is decreasing due to greater rates of evaporation
b. Deciduous trees are putting out their leaves later in the spring.
c. Warming of tropical waters that increase coral production.
d. Spring blooming flowers are staying dormant longer.
e. Increased intensity of hurricanes.
e
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A nearsighted woman (Nn) with hazel eyes (Hh) marries a man with normal vision and hazel eyes (Hh). Their three children all have blue eyes and normal vision. What is the probability that their next child will have blue eyes and be nearsighted?
A. 1/4 B. 1/2 C. 3/8 D. 1/8 E. 5/8
Which structure, A, B, C, or D, is the developing neural tube?
1.A
2.B
3.C
4.D
AZT is an effective drug for treating HIV-infected individuals because it prevents the replication of new viral particles. The HIV virus has a genome made of RNA. Of the following, which represents the most likely target for the action of AZT?
A) DNA in the host cell B) cell wall of the virus C) reverse transcriptase in the virus D) DNA ligase in the host cell
The movement of molecules from an area of higher concentration to an area of lower concentration without the participation of specific carrier molecules is called ________.
A. facilitated diffusion B. passive diffusion C. osmosis D. active transport