What type of electric charge do protons carry?
What will be an ideal response?
positive
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Seed plants
(a) have alternation of generations. (b) are heterosporous. (c) develop a seed coat. (d) are all of the above.
In the first step in oogenesis
A) a primary oocyte divides to form a secondary oocyte and a first polar body. B) an oogonium accumulates cytoplasm and DNA replicates. C) a stem cell divides to yield an oogonium and a spermatogonium. D) an oocyte divides to yield two polar bodies.
This molecule has two functions in a cell: encoding genetic information and using two additional
phosphates to transfer energy.
a. glucose b. AMP c. glutamic acid d. aspartic acid e. fat
The functions of the casparian strip include all of the following EXCEPT.
A. controlling materials that enter the vascular cylinder B. enabling a one-way passage of water and nutrients into the vascular cylinder C. forcing water to pass in between cells of the endodermis D. Keeping valuable nutrients inside the vascular cylinder