To conserve water, desert plants may have leaves that are reduced are entirely absent in which case a plant stems can perform photosynthesis
a. true
b. false
b. false
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Which of the following is responsible for the loss of amphibian populations around the world?
A. All of the answer options are correct. B. habitat loss C. pesticides D. herbicides E. fungal diseases
A bowl of sugar water is very stable. In a cell, however, it is rapidly broken down into carbon dioxide and water, releasing stored energy. What is the best explanation for this observation?
A. Enzymes in the cell catalyze the breakdown of the glucose. B. Cells use energy to break down the glucose. C. Glucose is only broken down while dissolving into a watery solution, such as inside the cell. D. Glucose cannot be broken down outside of a cell. E. Glucose becomes more chemically reactive inside of a cell.
When the death of species is less eminent, but the population of a particular species is quite small, it is
defined as being:a. extinct. b. extant. c. endangered. d. threatened. e. endemic.
Polar covalent bonds form when
A) more than one pair of electrons is shared. B) an acid and a base are combined. C) ions are formed. D) electrons are shared unequally between atoms. E) atoms from two molecules are repelling each other.