Which characteristic is unlikely to be associated with the profundal zone?

A. The deeper part of the lake
B. The area where light does not penetrate
C. Contains consumers
D. Contains primary producers
E. Contains cooler water than the other zones


Answer: D

Biology & Microbiology

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Which of the following is a unique feature of viruses that separates them from bacteria? 

A. They are generally smaller. B. They are often highly toxic. C. They lack proteins. D. They have different nucleotides in their hereditary material. E. They cannot exist outside of a host cell.

Biology & Microbiology

Information in living organisms can be transmitted by:

a. genes only. b. hormones only. c. neurotransmitters only. d. genes and hormones but not neurotransmitters. e. genes, hormones, and neurotransmitters

Biology & Microbiology

In open-water systems such as lakes and oceans, decomposition occurs mostly in the surface layer

Indicate whether the statement is true or false

Biology & Microbiology

Unequal crossing over during prophase I can result in one sister chromosome with a deletion and another with a duplication. A mutated form of hemoglobin, so-called hemoglobin Lepore, exists in the human population

Hemoglobin Lepore has a deleted series of amino acids. If this mutated form was caused by unequal crossing over, what would be an expected consequence? A) There should also be persons whose hemoglobin contains two copies of the series of amino acids that is deleted in hemoglobin Lepore. B) Each of the genes in the hemoglobin gene family must show the same deletion. C) The deleted gene must have undergone exon shuffling. D) The deleted region must be located in a different area of the individual's genome.

Biology & Microbiology