Soil particles composed of decomposing organic matter are called ____
a. sand
b. humus
c. silt
d. clay
e. mineral
ANSWER: b
Biology & Microbiology
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Water is a strongly polar molecule. How does it cross the plasma membrane?
What will be an ideal response?
Biology & Microbiology
Your friend does not believe that a platypus can be a mammal because it lays eggs like a bird or reptile. What evidence do you use to defend your position that a platypus is a mammal?
1.It is endothermic. 2.It has a cloaca. 3.It has mammary glands for milk production. 4.It does not have teeth.
Biology & Microbiology
__________ are free-living and usually kill their prey. Fill in the blank(s) with the appropriate word(s)
Biology & Microbiology
Which of these is controlled by serotonin?
Mood, hunger, thirst, and sex drive Emotions and complex movement Feeling of well-being All of these are controlled by serotonin
Biology & Microbiology