Which of the following features of how seedless land plants get sperm to egg are the same as for some of their algal ancestors?
A) Conjugation tubes are formed between sperm and egg cells.
B) Packets of sperm are delivered by wind to the eggs.
C) Aquatic invertebrates carry sperm to eggs.
D) Flagellated sperm swim to the eggs in a water drop.
D
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The ____ absorb nutrients through their plasma membranes and lack food vacuoles
a. golden algae b. apicomplexans c. dinoflagellates d. diatoms e. red algae
The cytoskeleton has several primary functions. The first and most obvious is that it acts as an interior skeleton that supports the rest of the cell. What is another function of the cytoskeleton?
A. It connects one cell to another. B. It creates a durable outer covering to increase the strength and rigidity of the cell. C. It provides a communication network whereby chemo-electrical signals can be sent from one area of the cell to another. D. It provides a series of tracks along which vesicles can move throughout the cell.
According to the clip, where are the light-harvesting organelles found within plants?
a) throughout the flowering parts of the plant b) in the seeds c) in the stem d) near the surface of the leaves e) in the roots
The formed elements account for about what percentage of the total volume of blood?
A) 100 percent B) 10 percent C) 45 percent D) 75 percent