Explain the collection and flow of lymph
What will be an ideal response?
Interstitial fluid flows into lymphatic capillaries, where it is then called lymph. Lymph flows toward lymph nodes, is filtered and screened for invading agents, and finally rejoins the venous blood supply. Upon rejoining the blood it is no longer called lymph, but is now plasma.
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Which of the phylogenetic trees above best demonstrates cladogenesis?
A. Tree 1
B. Tree 2
C. Tree 3
D. Both Tree 2 and Tree 3
E. Both Tree 1 and Tree 2
A tracer is a substance with what attached to it?
a. a radioisotope b. water c. glucose d. ion e. antibodies
Because genetic information is stored as a linear sequence of bases in DNA, any change in the order or number of
bases in a gene can result in a(n) ____________________ that produces an altered ____________________. Fill in the blank(s) with the appropriate word(s).
Consider the following DNA sequences for four different species:1: AATCG2: TAATG 3: ATACC4: ATAGGBased on the principle of parsimony, which species shares a most recent common ancestor with a species having the sequence TTACC?
A. Species 3 B. Species 2 C. Species 4 D. Species 1