Answer the following statements true (T) or false (F)
1.Estrogen is a male sex hormone.
2.Follicle-stimulating hormone (FSH) is only found in females.
3.Birth control pills only contain estrogen.
4.Sea urchins display external fertilization.
5.Fruit fly development expression of the bicoid gene on one end of the embryo is necessary for proper head positioning.
1.FALSE
2.FALSE
3.FALSE
4.TRUE
5.TRUE
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Which answer best describes energy flow in biological systems as described in the text?
a. glucose ? G3P ? NADH ? ATP b. bacteria ? archaea ? plants ? animals c. NAD+ ? NADH ? ADP ? ATP d. G3P ? glucose ? ATP ? NAD+ e. pyruvate oxidation ? glycolysis ? fermentation ? citric acid cycle
Upon antigenic stimulation, CD8+ T cells differentiate into helper T cells
Indicate whether the statement is true or false.
In sexual reproduction in multicellular organisms, produces haploid gametes, and unites the gametes to create diploid zygotes.
A. meiosis; fertilization B. mitosis; pollination C. fertilization; meiosis D. pollination; fertilization E. fertilization; mitosis
Pheromones ____
a. are signaling molecules that are used for olfactory communication between two different species b. are only used by invertebrates c. require a vomeronasal organ to be detected d. are signaling molecules used for olfactory communication between members of the same species e. are signaling molecules geese use for navigation