A cotyledon is
A. a nutritional resource for the embryo plant.
B. a spore-like structure used for reproduction in plants.
C. the first leaf structure to arise in the embryo of an angiosperm.
D. a part of the fruit tissues of the plant.
E. both a nutritional resource and the first leaf for the embryonic plant.
E. both a nutritional resource and the first leaf for the embryonic plant.
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Answer the following statements true (T) or false (F)
1. A magnifying glass could be considered a simple microscope. 2. The total magnification achieved when the oil immersion lens is used is 1,000 ×. 3. Fluorescence microscopy is often used in immunology laboratories. 4. The resolving power of electron microscopes is much better than that of compound light microscopes because the wavelength of electrons is much longer than that of visible light. 5. Primary syphilis is usually diagnosed in the clinical microbiology laboratory by the use of a scanning electron microscope.
What do eudicots have that is not present in monocots?
A. Parallel venation.B. Leaf blade. C. Netted venation. D. Nodes. E. Internodes.
The pressure of the oceans increases by one atmosphere for every ____ meter increase in depth
a. 5 b. 10 c. 15 d. 20 e. 25
Which protein class directly controls many of the metabolic reactions within a cell?
A) operator proteins B) enzymes C) structural proteins D) repressor proteins E) hydrophilic proteins