According to the figure, which area is seen as exhibiting only increases in NPP due to climate change?
A) South America
B) Africa
C) Australia
D) Western Europe
D
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. Former president Ronald Reagan once commented at a press conference that the best way to combat the spread of AIDS in the US was to prohibit everyone from having sexual contact for 5 years
What would be the success of such a program if it were possible to carry out? A. It would 'cure' the population of HIV/AIDS. Everyone that had it would die off, and no new cases would occur, since sexual contact is the only mode of transmission for this virus. B. It would be a failure-this 'program' wouldn't eliminate IV drug use or transmission of HIV from mother to child. Sexual transmission isn't the ONLY mode of transmission for this virus. C. It would be a failure-many HIV positive individuals survive for longer than 5 years, even without treatment (sometimes without even realizing they're positive). Once sexual contact resumed, sexual transmission would also resume. D. It would be a failure-this 'program' wouldn't eliminate IV drug use or transmission of HIV from mother to child. Sexual transmission isn't the ONLY mode of transmission for this virus, AND many HIV positive individuals survive for longer than 5 years, even without treatment (sometimes without even realizing they're positive). Once sexual contact resumed, sexual transmission would also resume.
Tay-Sachs disease
a. is controlled by a simple recessive gene. b. is a sex-linked disease more common in males. c. occurs only in those individuals that receive two copies of a defective recessive gene. d. is the result of the failure of chromosomes to separate so that an individual receives three instead of two chromosomes. e. depends on which parent passes the gene to the child.
Which of the following best describes the condition of a twig if the auxin produced by its apical meristem is conveyed equally down all sides?
A) It will elongate. B) It will branch near its tip. C) It will produce a flower. D) It will bend to one side.
Which environmental factor is most significant for flowering?
A) Light intensity B) Temperature C) Water availability D) Day length E) Nitrogen availability