Which class of hormones produced in the roots of plants promotes cell division and growth and retards the aging of flowers and leaves?
A) gibberellins
B) phytochromes
C) cytokinins
D) ethylene
Answer: C
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Without the SRY gene, humans and other mammals would develop and retain the female sex organs and phenotype
A. true B. false
During _________ solutes move inside the cell, but during _______ solutes move outside the cell.
a. endocytosis; exocytosis b. pinocytosis; phagocytosis c. exocytosis; endocytosis d. receptor-mediated endocytosis; pinocytosis
Neurotransmitters move by active transport across the synaptic cleft
____________________ Indicate whether the statement is true or false.
The African country of Nigeria had a 4.55% population growth rate from 2005 to 2010, the highest in the world. Which of the following statements is consistent with this fact?
A) Nigeria's age structure likely looks like a pyramid with a broad base. B) Nigerian birth rates are likely to be slightly lower than death rates. C) Nigeria is likely in the first phase of the demographic transition. D) Nigerian emigration rates are likely higher than immigration rates.