Which of the following intestinal protozoa are considered parasites of humans only?
A) Entamoeba histolytica
B) Balantidium coli
C) Cyclospora cayentanensis
D) Giardia intestinalis
E) both Entamoeba histolytica and Cyclospora cayentanensis
E
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You observe a lizard sitting on a log on a sunny day. If the lizard is attempting to raise its body temperature by basking in the sun, what mechanism of heat transfer is being employed?
A) conduction B) convection C) radiation D) evaporation
In tropical forests, the vast majority of water returning to the atmosphere is through
a. evaporation from the leaves of plants. b. sweat from animals. c. evaporation of urine secreted by animals. d. evaporation from puddles and ponds. e. evaporation from rivers and lakes.
The leaves of a plant typically have different tissue layers that function in different ways. The epidermis layer functions like a covering of skin to protect the leaf while vascular bundles carry water and nutrients through the leaf. The palisade mesophyll layer is responsible for most of the photosynthesis that occurs while the spongy mesophyll layer underneath it aids in the exchange of gases (CO2 and O2) and water vapor. In which leaf tissues would you expect to find the highest density of chloroplasts?
a. epidermis b. vascular bundles c. spongy mesophyll d. palisade mesophyll
The primary reservoir for the nutrient ________ is rock
Fill in the blank(s) with correct word