________ are tiny blood vessels leading away from capillaries to veins.
Fill in the blank(s) with the appropriate word(s).
Venules
Venules are tiny blood vessels leading away from capillaries to veins.
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There is a population of beetles that typically have black wings. A scientist studying these beetles knows that their eggs hatch in early spring, the young insects grow through the late spring and summer, they lay eggs in the early fall and they die in the early winter. Recently some beetles have been born with white wings. Early in life, the black- and white-winged beetles seem to be very similar in number of mating events, eggs laid, and survival rates, but shortly after laying their eggs the white beetles die and there are only black-winged beetles during the late fall. Which of the following is a true statement about the beetles?
A) White- and black-winged beetles have equal fitness. B) Black-winged beetles have a higher fitness than white-winged beetles. C) The number of baby white-winged beetles will decrease in frequency over time. D) White wings are an adaptation.
All of the red squirrels living on a college campus would be a(n)
A) genus. B) family. C) population. D) ecosystem. E) community.
The soil layer surrounding plant roots, called the rhizosphere, has been shown in some cases to _____
A) contain fungi that produce an endotoxin which inhibits the growth rhizomes B) inhibit the growth of fungal pathogens C) produce vitamins essential for the uptake of nitrogen D) contain archaea which produce antibiotics that prevent the growth of most bacteria
How is most carbon dioxide transported in the blood?
A. on the free hemoglobins since they have lost their oxygen in the tissues B. as bicarbonate ions (HCO3) C. as carbon monoxide D. as carbon compounds and oxygen radicals E. as gas bubbles of CO2, just as in carbonated soft drinks