Biological transmission differs from mechanical transmission in that biological transmission
A) occurs when a pathogen is carried on the feet of an insect.
B) involves fomites.
C) involves reproduction of a pathogen in an arthropod vector prior to transmission.
D) requires direct contact.
E) works only with noncommunicable diseases.
C
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A rosebush needs to increase the concentration of phosphorus in the water within its xylem. Assuming that there is plenty of usable phosphorus dissolved in the water of the surrounding soil, how can the rosebush achieve this?
A. by transporting more phosphorus across the root cortex B. by transporting more phosphorus across root hairs C. by transporting more phosphorus across the root endodermis D. by transporting more phosphorus across the epidermis of roots
An amino acid is to a protein as a ________ is to a nucleic acid.
A. glucose B. glycerol C. nucleotide D. fatty acid E. cellulose
The single most important factor that determines the distribution of life in the oceanic province is ________.
Fill in the blank(s) with the appropriate word(s).
While looking at a flower in your garden, you notice that it has carpels with very long styles, and stamens with very short filaments. This plant is most likely to reproduce by _____
A) cross-pollination B) selfing C) asexual reproduction