The cell theory is a fundamental organizing principle of biology that states all of the following, except _____
the cell is the smallest unit of life
cells make up all living things
new cells can arise only from preexisting cells
living things are made of at least two cells
D. living things are made of at least two cells
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What is the main difference between a virulent and temperate bacteriophage?
What will be an ideal response?
The reason that some individual hormones have so many different effects is that
a. they influence gene transcription. b. they trigger a second messenger system that produces a cascade of effects. c. there are a great many different cells in different tissues that have specific receptors for the hormone. d. the hormone is carried throughout the body and only a small amount is needed to produce its effect. e. they are realeased in different concentrations.
Proteins can have separate domains with distinct structures and functions.
Answer the following statement true (T) or false (F)
Flimmer filaments ________.
A. function to move cells on solid surfaces B. are components of all eukaryotic flagella C. permit flagella to pull rather than push the cell D. are found on whiplash flagella