The higher the pH the more __________ the environment.
acidic
neutral
alkaline
hypotonic
alkaline
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All of the following are true of mycorrhizae EXCEPT
A) they are fungi that form beneficial relationships with plants. B) an example is the food delicacy truffles. C) the vesicular-arbuscular mycorrhizae are a type of ectomycorrhizae. D) they enable plants to absorb soil nutrients. E) ectomycorrhizae extend the surface area of roots for nutrient absorption.
Which of the following is most likely to occur if a parasite accidentally introduced into the Great
Lakes kills 95% of all living organisms living in the lakes? a. hybridization b. mass extinction of the surviving organisms c. allopatric speciation in the surviving organisms d. adaptive radiation of the surviving populations e. evolution of surviving organism
Which immunoglobulin is the first type to be made during the primary response to an antigen?
A. IgA B. IgD C. IgM D. IgE E. IgG
Which part of the cell membrane helps in cell-cell signaling?
a. Unsaturated fatty acids b. Carbohydrates c. Cholesterol d. Proteins e. Lipids