Viruses have all the following EXCEPT
a. are usually species-specific.
b. may have multiple origins.
c. are probably related to mobile genetic elements.
d. may have escaped from cells.
e. have mitochondria
E
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Lamellipodia
A) are found in the basal lamina. B) add structural rigidity to cells. C) contain microtubules. D) are thin sheets of cytoplasm use for cell movement. E) do not involve actin or tubulin.
One major difference between ectomycorrhizae and arbuscular mycorrhizae is
A. ectomycorrhizae are parasitic on plant roots while arbuscular mycorrhizae are not. B. ectomycorrhizae do not penetrate plant roots; arbuscular mycorrhizae penetrate plant roots. C. ectomycorrhizae are more common on plant roots than arbuscular mycorrhizae. D. ectomycorrhizae form mutualisms while arbuscular mycorrhizae are parasitic. E. most ectomycorrhizae are zygomycetes while most endomycorrhizae are basidiomycetes.
A nutritionist has an enclosed cabinet used to calculate the calories in foods. The protocol requires that the food is set on fire as fuel under a water tank and then the temperature change in the water is equated to the calorie content in the foods. High calorie foods burn better than low calorie foods. Why?
a. High calorie foods have less water than low calorie foods and water cools the heat transfer reaction during combustion. b. The third law of thermodynamics states that change of state reactions like combustion will result in decreased entropy. c. Burning the foods is an energy transformation. The second law of thermodynamics says that no energy transformation is 100% efficient. Some of the energy is usually lost to the surroundings as heat. d. The oxygen given off by high calorie foods is extremely combustible and that is what generates the heat. Foods that are burned have fewer calories after the protocol.
A person with type O blood has which antibodies?
a. A only b. B only c. A and B d. neither A or B e. O