The necessity for elaborate sterilization procedures in hospitals and canneries is due to
a) endospores.
b) fungal spore.
c) vegetative cells.
d) protozoan cells.
e) viruses.
Ans: a) endospores.
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The pressure required to stop water from moving across the membrane by osmosis is called
A. transport pressure. B. crenation pressure. C. atmospheric pressure. D. osmotic pressure. E. mechanical pressure.
Answer the following statement(s) true (T) or false (F)
1. Protist locomotion is accomplished by the contraction of muscle fibers. 2. Pollination and fertilization are essentially the same process. If pollination occurs, fertilization will follow quickly. 3. After fertilization the zygote continuously develops until an embryonic plant is formed within the seed. 4. All gymnosperms have needle-like leaves and produce some type of resin. 5. In seed plants the sporophyte has been greatly reduced in size and is typically just a few cells.
Hybridization between different species is rare because it ____
a. requires the breakdown of a barrier preventing interbreeding b. causes lethal mutations in hybrid offspring c. leads to the exchange of genes between closely related species
d. leads to gene flow between species e. contradicts the species concept
Which food product would likely contain the largest amount of unsaturated fat?
a. butter b. lard
c. salami d. olives e. cheese