Which of the following groups include organisms that are a key source of food in all aquatic environments and whose fossilized forms are used as a filter and as a grinding and polishing agent?
A) diatoms
B) brown algae
C) amoebas
D) dinoflagellates
Answer: A
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What condition develops when serotonin levels in the brain are deficient?
A. insomnia B. epilepsy C. Alzheimer's disease D. Parkinson's disease E. Huntington's disease
If a daughter expresses an X-linked recessive
gene, she inherited the trait from a. her mother. b. her father. c. both parents. d. neither parent. e. her grandmother
In the Linnaean classification system, each species is given a unique scientific name, such as Sequoia sempervirens. What is are the two parts called that make up this name?
a) genus and phylum b) class and kingdom c) order and family d) genus and specific epithet e) specific epithet and order
The maximum rate at which a population could increase is known as its ________
Fill in the blank(s) with correct word