Atoms with atomic numbers between lithium and neon have two energy levels

Indicate whether the statement is true or false.


T

Biology & Microbiology

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Many psychoactive drugs affect the

a. thalamus. b. pituitary gland. c. pineal body. d. hypothalamus. e. corpora quadrigemina.

Biology & Microbiology

The uncondensed length of human DNA found in chromosomes is _______, whereas a typical cell is 10 µm in length.

a. 5 µm b. 2 µm c. 2 meters d. 20 meters e. 2.54 inches

Biology & Microbiology

In a hypothetical situation, a bacterium lives on the surface of a leaf, where it obtains nutrition from the leaf's nonliving, waxy covering while inhibiting the growth of other microbes that are plant pathogens

If this bacterium gains access to the inside of a leaf, however, it causes a fatal disease in the plant. Once the plant dies, the bacterium and its offspring decompose the plant. What is the correct sequence of ecological roles played by the bacterium in the situation described here? 1. nutrient recycler 2. mutualist 3. commensal 4. pathogen 5. primary producer A) 1, 3, 4 B) 2, 3, 4 C) 2, 4, 1 D) 1, 2, 5

Biology & Microbiology

What is the major developmental characteristic that shows the close relationship between echinoderms and chordates?

a. In both groups, the gut develops from front to back. b. In both groups, all individuals have notochords during the larval stage. c. In both groups, the gut develops from back to front. d. In both groups, development occurs by continually adding skeletal elements. e. Both groups have bilateral symmetry in all life stages.

Biology & Microbiology