Explain the difference between primary and secondary growth
What will be an ideal response?
Primary growth, which is found in all vascular plants, comes from apical meristems and results mainly
in elongation of the plant in both the root and shoot systems. Secondary growth occurs in some plants,
and when it does occur it primarily increases the girth of the plant through growth that comes from the
vascular cambium and the cork cambium. Woody tissues are a hallmark of secondary growth.
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____ molecules carry amino acids to
ribosomes.
a. Template RNA b. Messenger RNA c. Transfer RNA d. Ribosomal RNA e. All of these
Ecosystem ecology is primarily concerned with
A. movement of energy and materials through ecosystems. B. species interactions in various types of ecosystems. C. ecosystem stability. D. the synthesis of nutrients within ecosystems. E. patterns of species diversity within ecosystems.
Bacterial resistance to antibiotics has evolved due to widespread use of antibiotics ________
a. in humans under nonessential circumstances b. all of the choices c. to fight bacterial diseases d. as a preventive measure in animal feed
Which hormone raises blood glucose levels?
A. glucocorticoids B. epinephrine C. insulin D. glucagon E. melatonin