Which of the following is a single-layered, hollow ball of 16 cells?
a. cleavage
b. morula
c. gastrula
d. zygote
e. blastula
B
Biology & Microbiology
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The sac which surrounds the heart is called the
A. endocardium. B. pericardium. C. atrium. D. myocardium
Biology & Microbiology
Which type of plant hormone is synthesized mainly in root tips and is apparently transported through
the plant in xylem sap?
a. gibberellins b. auxins c. oligosaccharins d. ethylene e. cytokinins
Biology & Microbiology
The information that determines what an organism will be like is stored in the ________ molecule.
Fill in the blank(s) with the appropriate word(s).
Biology & Microbiology
In a resting potential, an example of a cation that is more abundant as a solute in the cytosol of a neuron than it is in the interstitial fluid outside the neuron is _____
A) Cl- B) Ca++ C) Na+ D) K+
Biology & Microbiology