The seed is produced by the maturation of the ____.
A. embryo
B. ovule
C. ovary
D. sperm
E. pollen
Answer: B
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Why are hydrocarbons insoluble in water?
A) The majority of their bonds are polar covalent carbon-to-hydrogen linkages. B) The majority of their bonds are nonpolar covalent carbon-to-hydrogen linkages. C) They are hydrophilic. D) They exhibit considerable molecular complexity and diversity. E) They are less dense than water.
If goats are crossed with sheep, embryos will form but cease development and spontaneously abort. This is an example of
A. a prezygotic mechanism. B. hybrid inviability. C. hybrid sterility. D. hybrid breakdown. E. spermatic behavior.
Carnivorous plants like Sarracenia purpurea are which of the following?
A. detritivores B. producers and consumers C. producers D. consumers E. producers and detritivores
Electron microscopes use electrons rather than light to view a specimen. Some of these microscopes pass a stream of electrons through a specimen. Both the stream of electrons and the specimen must be in a vacuum chamber. What is a limitation of using such an electron microscope?
A) Living specimens cannot be observed. B) Prokaryotic cells cannot be examined. C) Images appear very fuzzy because of low resolution. D) The power of magnification decreases.