Synovial fluid
What will be an ideal response?
Viscous, slippery filtrate of plasma and hyaluronic acid. Lubricates and nourishes articular cartilage. Contains phagocytic cells to remove microbes and debris.
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In soil, which horizon is considered the soil base?
a. O horizon b. A horizon c. C horizon d. B horizon
The two figures below represent an asexual and a sexual population, respectively. The letters indicate beneficial mutations
The colored areas represent the frequency of particular combinations of mutations in the population over time. Why does it take longer for the beneficial allele combination ABC to go to fixation in the asexual than in the sexual population? a. In the asexual population, new allelic combinations have to arise via de novo mutations. b. There really is no principal difference between asexual and sexual popula-tions. In the sexual population shown, the favorable mutations just happen to be on different chromosomes. c. The effective population size of both populations is the same. d. Sexual populations tend to have higher mutation rates.
In rabbits, the homozygous CC is normal, Cc results in deformed legs, and cc results in very short legs. The genotype BB produces black fur, Bb brown fur, and bb white fur. If a cross is made between brown rabbits with deformed legs and white rabbits
with deformed legs, what percentage of the offspring would be expected to have deformed legs and white fur? A) 25% B) 33% C) about 66% D) 100% E) 50%
Structural features that contain the protein actin and help to strengthen and change the shapes of eukaryotic cells are known as ____
a. plastids b. vacuoles c. microvilli d. nucleoli e. microfilaments