Energy flow is one-way because ____
a. all of the energy in an ecosystem stays constant
b. the amount of energy a producer harvests is equal to the amount of energy consumers consume
c. with each energy transfer, some energy escapes as heat
d. energy cannot be created but it can be destroyed
e. there is only one form of energy
ANSWER: c
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The average American consumes about ____
pounds of fat per year.
a. 100 b. 80 c. 70 d. 50 e. 20
How do the reproduction of human immunodeficiency virus (HIV) and bacteriophage lambda differ from each other?
A. HIV production requires integrase, while bacteriophage lambda does not B. bacteriophage lambda attaches to specific proteins on the cell surface, while HIV does not C. HIV encodes and uses reverse transcriptase, while lambda phage does not D. HIV can reproduce in either eukaryotic or prokaryotic cells, while bacteriophage lambda can only infect bacteria E. None of the answers are correct.
Instead of coping with stress, some animals ________ by leaving the population to seek vacant habitats
Fill in the blank(s) with correct word
What is the name of the chromosomal region, located on region 21q22.2, that was identified by studying individuals with partial trisomy of chromosome 21?
What will be an ideal response?