__________ are produced in organs known as __________
a. Gametes; gonads
b. Gonads; gametes
c. Sperm; spermatocytes
d. Eggs; uterus
A
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The one-way flow of air along parabronchi makes what type of gas exchange mechanism possible, at least theoretically?
A) the same as that occurring in fish gills B) the same as that occurring in insect tracheae C) the same as that occurring in mammalian lungs D) the same as that occurring in echinoderm skin gills
Carbon balance focuses on the balance between
A) uptake of CO2 in photosynthesis and loss of heat via evapotranspiration. B) loss of CO2 through respiration and gain of nutrients. C) loss of H2O balanced with the gain of CO2 via transpiration. D) uptake of CO2 in photosynthesis balanced with the loss of CO2 during respiration.
In a population with low death rates, this age structure diagram indicates that
A. the biotic potential must be larger than usual. B. the population will continue to grow for some time. C. the population is stable. D. the population is decreasing.
Which of the following is a C4 plant?
A) cactus B) lilac C) pine trees D) corn E) orchids