Weegy: An enzyme is a large PROTEIN molecule.
User:
Why are enzymes necessary?
to retard the rate of decomposition
to act as a catalyst in chemical reactions
to conserve the stored energy of the cell
Weegy: Enzymes are necessary to act as a catalyst in chemical reactions.
User:
Humans have pores in their skin to sweat and cool off the body. Plants have similar structures called _____.
pores
tendrils
stomata
receptacles
User:
The most significant characteristic of sexual reproduction is _____.
genetic identity
genetic variability
multiple offspring
rapid reproduction
Weegy: The most significant characteristic of sexual reproduction is genetic Variability.
User: The purposes of mitosis are _____.
growth of organisms
reproduction of gametes
cell renewal
repair of injuries
genetic variation
asexual reproduction
Weegy: The answer is growth of organisms, cell renewal, repair of injuries, genetic variation & asexual reproduction.
User:
The process that creates specialized cells like blood cells, nerve cells, or bone cells, is called _____.
specialization
differentiation
elongation
User:
An organized process that is used to gather and analyze observations and test a hypothesis is a(n) _____.
scientific law
experiment
problem
theory
Weegy: An organized process that is used to gather and analyze observations and test a hypothesis is an experiment.
User: The first step in scientific investigation is: .
Weegy: The first step in scientific investigation is asking a question/stating a problem.
User:
If repeated observations and experiments yield the same results, then the explanation is a _____.
scientific law
theory
hypothesis
problem
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