What are the properties of life?
What will be an ideal response?
ANSWER: Life makes and uses organic molecules, and is made of one or more cells. Life engages in
metabolism to maintain homeostasis and to hydrolyze and synthesize molecules. Life grows,
matures and ages - and thus is in constant change. And while DNA serves as the molecule of
heredity to keep life similar from one generation to the next, life can change and evolve.
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To reproduce, many plants produce seeds-structures containing embryonic offspring along with nutrients inside a tough case. These offspring develop after being released by the parent plant
To which animal reproductive strategy is seed production most comparable? A) oviparous reproduction B) ovoviviparous reproduction C) viviparous reproduction
Some present-day bacteria use a system of anaerobic respiration characterized by an electron transport chain analogous to that found in aerobic organisms. Which of the following correctly characterizes the anaerobic electron transport chain?
A. It uses oxygen as a final electron acceptor. B. It is embedded in the outer mitochondrial membrane rather than the inner mitochondrial membrane. C. It establishes a proton gradient between the cytoplasm and the extracellular fluid. D. It establishes a proton gradient between the intermembrane space and the cytoplasm. E. None of these answer options accurately characterizes the anaerobic electron transport chain.
Sensory signals, other than olfactory, are routed through the thalamus which serves as a clearinghouse, sorting signals and sending them to which part of the brain?
a. medulla b. cerebellum c. cerebral cortex d. Broca’s area
Which soil horizon has no organic matter or
weathered rock? a. A b. B c. C d. D e. E