Trace the path of a chef's salad with croutons down the digestive tract, and explain what takes place in
each specialized region. What will be an ideal response?
Concepts to Consider: Mouth--mechanical digestion and chemical digestion of starch (croutons);
Esophagus--peristalsis moves food into stomach; Stomach--mechanical churning of food and protein
breakdown (ham, turkey, etc.); Small intestine--most chemical digestion takes place in duodenum
(starch, protein, fat from cheeses, dressing, meats, and croutons), and absorption occurs in jejunum and
ileum; Large intestine--absorption of water and sodium; wastes, including a large amount of fiber from
the lettuce and other vegetables, pass through the cecum, ascending, transverse, descending, and
sigmoid colons before leaving through the rectum and anus.
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Until the discovery of ________, enzymes were the only recognized biological molecules that were catalytic.
Fill in the blank(s) with the appropriate word(s).
Which statement best describes what ultimately happens to the chemical energy that is not converted to new biomass in the process of energy transfer between trophic levels in an ecosystem?
A) It is undigested and winds up in the feces and is not passed on to higher trophic levels. B) It is used by organisms to maintain their life processes through the reactions of cellular respiration. C) Heat produced by cellular respiration is used by heterotrophs for thermoregulation. D) It is eliminated as feces or is dissipated into space as heat, consistent with the second law of thermodynamics. E) It is recycled by decomposers to smaller and smaller forms until it finally breaks down to form soil.
Why is the outcome of a base-pair substitution mutation variable? List and describe the possible outcomes of a base-pair substitution mutation in your answer
What will be an ideal response?
A binomial is always a
(a) genus. (b) specific epithet. (c) scientific name. (d) two-part name.