How do earthworms move?
What will be an ideal response?
The earthworm has two sets of muscles. Longitudinal muscles parallel the body's long axis, and circular muscles ring the body. The worm's coelomic fluid is a hydrostatic skeleton. Action of the muscles puts pressure on the fluid trapped inside body segments, causing them to change shape. When a segment's longitudinal muscles contract, the segment gets shorter and fatter. When circular muscles contract, a segment gets longer and thinner. Coordinated waves of contraction that run along the body propel the worm through soil.
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Among cats, there is great variation in color and length of coats from long-haired, orange and
white Ragdolls and Persians to cats with little to no hair.
These traits associated with fur type are examples of __________ traits.a. acquired b. inherited c. evolutionary d. genomic
During DNA replication, the ____ strand is assembled in the ____ direction that the DNA double helix unwinds and is produced by ____ replication.
a. leading; opposite; continuous b. lagging; same; discontinuous c. leading; same; discontinuous d. lagging; opposite; continuous e. leading; same; continuous
Which model organism best represents the human genome?
a. Caenorhabditis elegans b. Escherichia coli c. Homo sapiens d. Drosophila melanogaster
Answer the following questions true (T) or false (F)
1. Protozoa are also called prokaryotes. 2. Single-celled organisms known as diatoms have glasslike walls and are a type of algae. 3. The use of Saccharomyces as a probiotic is an example of the application of biotechnology.