How are symbiotic relationships important in agriculture and food production? Use at least two different examples to support your answer and explain how understanding these symbioses could help produce more food
What will be an ideal response?
Answer: Answers can use any two of the following symbioses: i) Root nodules (22.3); ii) arbuscular mycorrhizae (22.5); iii) Azolla-Anabaena (22.3); iv) Agrobacterium (22.4); or v) ruminant animals (22.7). The answers should explain the symbiosis in sufficient detail such that a conclusion can be reached about how the symbiosis increases production of food. For example, root nodules result in increased N supply to legumes (bean crops and alfalfa) without fertilizer; arbuscular mycorrhizae increase N and P supply to plants such as wheat and oats; Anabaena increases N supply to rice without fertilizer; Agrobacterium can be used to engineer crops in many ways to increase yield, disease resistance, or drought tolerance; and understanding ruminant animal biology could improve the health of the ruminant animals and increase production of milk and/or meat.
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a. enzymatic breakdown or pumping back into presynaptic cells b. enzymatic breakdown only c. pumping back into presynaptic cells only d. neutralization by antibodies e. ionic degradation
In human, the amount of air entering and leaving the lungs during inhalation and exhalation is called the:
1.Residual volume 2.Respiratory capacity 3.Tidal volume 4.Vital capacity
A chromosome ____
a. consists of DNA and its associated proteins b. is a single stranded DNA molecule c. anchors the DNA within the nucleus d. stabilizes the nuclear membrane e. is found within the nucleus and cytoplasm
Many chaperones are called heat-shock proteins because they
a. are expressed at higher levels after a heat shock than at normal growth conditions. b. cause fever in mammals. c. misfold during a heat shock. d. denature at high temperatures.