21. Which of the following could be considered to be both a biotic and abiotic component of an organism's environment? sunlight temperature rocks metabolic wastes
22. The ability of plants to respond to light by growing toward a light source is an example of geotropism. photoperiodism. phototropism thigmotropism
23. If a population is in equilibrium, the birth rate will be greater than the death rate. number of individuals will increase each year. birth rate will be equal to the death rate. number of individuals will decrease each year.
24. Of the 20 amino acids required by human beings, nine of these are considered to be essential amino acids because all human carbohydrates contain these nine amino acids. these nine amino acids are the only ones used in human proteins. humans cannot synthesize these nine amino acids. these nine amino acids are lacking in animal-based foods.
25. All of these organs are part of the digestive system except the pancreas. kidney. tongue. stomach.
21. Which of the following could be considered to be both a biotic and abiotic component of an organism's environment? sunlight temperature rocks metabolic wastes
22. The ability of plants to respond to light by growing toward a light source is an example of geotropism. photoperiodism. phototropism thigmotropism
23. If a population is in equilibrium, the birth rate will be greater than the death rate. number of individuals will increase each year. birth rate will be equal to the death rate. number of individuals will decrease each year.
24. Of the 20 amino acids required by human beings, nine of these are considered to be essential amino acids because all human carbohydrates contain these nine amino acids. these nine amino acids are the only ones used in human proteins. humans cannot synthesize these nine amino acids. these nine amino acids are lacking in animal-based foods.
25. All of these organs are part of the digestive system except the pancreas. kidney. tongue. stomach.
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