Unlike primary villi, secondary villi have ____. Tertiary villi have that and ____.
A. Cytotrophoblasts; Mesoderm
B. Capillaries; Spiral Arteries
C. Mesoderm; Capillaries
D. Syncytiotrophoblasts, Cytotrophoblasts
E. Syncytiotrophoblasts, Spiral Arteries
Answer: C. Mesoderm; Capillaries
You might also like to view...
Which gas is increasing in the atmosphere and
intensifying the greenhouse effect? a. carbon dioxide b. carbon monoxide c. ozone d. nitrogen e. oxygen
What do amoebas use pseudopodia for besides movement?
a. excretion b. feeding c. avoiding predation d. asexual reproduction
Approximately 45% of a person's body weight is:
A) interstitial fluid. B) intracellular fluid. C) extracellular fluid. D) intravascular fluid.
To study how proteins fold, scientists must be able to purify the protein of interest, use solvents to denature the folded protein, and observe the process of refolding at successive time points
What is the effect of the solvents used in the denaturation process? (a) The solvents break all covalent interactions. (b) The solvents break all noncovalent interactions. (c) The solvents break some of the noncovalent interactions, resulting in a misfolded protein. (d) The solvents create a new protein conformation.