Ecosystem diversity
A. is primarily associated with aquatic habitats.
B. is the diversity of animal species within a defined geographical area.
C. includes only species-rich ecosystems.
D. refers to the structure and function within an ecosystem.
Answer: D
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Which of the following can be used to cultivate plant viruses?
A. Plant protoplast cultures B. Whole plants C. Cultures of separated plant cells D. All of the choices are correct.
Which hormone prevents menstruation in a pregnant woman?
a. follicle stimulating hormone b. lutenizing hormone c. estrogens d. human chorionic gonadotropin e. testosterone
The following items are organelles found in animal cells
Respond to statements 100–108 with reference to these organelles. a. ribosome b. mitochondrion c. lysosome d. Golgi body e. endoplasmic reticulum E 100. This organelle is the site of polypeptide assembly. M 101. The cellular digestion and disposal of biological molecules occurs inside this organelle. M 102. Aerobic respiration occurs in this organelle. M 103. RNA carries out the genetic code translation process in association with ribosomes on this organelle. Chapter 4 Cell Structure and Function 11 M 104. The packaging of secretory proteins occurs in association with this structure. M 105. This organelle is involved in lipid production and protein transport. E 106. Proteins are synthesized on this tiny, two-part organelle. E 107. Sugar metabolism occurs in association with this organelle. D 108. DNA synthesis occurs in the nucleus. Its breakdown can occur in this organelle.
In the axoneme, dynein sidearms are anchored on
A) B tubules. B) A tubules. C) central pair tubules. D) radial spokes. E) interdoublet nexin.