As hinted in the question, the cross bridge cycle is a
series of molecular events that occur after excitation of the sarcolemma. A
cross bridge is formed when a myosin head bound to actin. The cross bridge
cycle depends on the presence of calcium ions
Answer:
Option B, Apply auxin directly to the lower part of the stem opposite from the direction you want the stem to bend.
Explanation:
Options for the question are
A) Apply auxin directly to the shoot tip on the side to which you want the tip to bend.
B) Apply auxin directly to the lower part of the stem opposite from the direction you want the stem to bend.
C) Inject compounds that block auxin receptors into the part of the stem opposite from the direction you want the stem to bend.
D) Plant the roots in two different pots, and apply auxin to the root bucket that is on the same side as the direction you want the plant to bend.
Solution
Auxin is responsible for stem elongation by inhibiting growth of lateral buds. The movement of auxin is opposite to the direction of elongation of cells. Generally, Auxin moves to the dark side which is opposite to the direction i.e the lighter side in which cell elongate . Due to this growth pattern, the stem tip gets curved towards the light.
Hence, option B is correct
<span>The yeast will produce the most cellular respiration at an optimum temperature. This temperature will be at a normal room temperature. If the temperature of the environment surrounding the yeast is too low, the rate will decrease, because the molecules involved in the process of cellular respiration will slow down resulting in lesser rate. In addition, if the temperature of the environment surrounding the yeast is too great, the rate will also decrease, because the enzymes involved in cellular respiration will denature causing the rate to decrease. Therefore, the yeast will have the greatest rate of cellular respiration at room temperature. </span>
Key is to lock as D. Substrate is to active site.
A trait that evolved and was selected by natural selection for its current function is known as an adaptation. Any hereditary traits that improve an organism's likelihood of survival benefit from adaptations. Option C is the appropriate response in this case.
In order to survive in their environment and function better under the conditions there, plants and animals have modified their physical characteristics or behaviours. The strongest and most advantageous traits or adaptations are handed on to the following generation, ensuring the survival of the plants or animals. Examples of adaptations include a camel's capacity for water storage, polar bears' use of their white fur to blend into the ice, and chameleons' capacity to change colour to evade predators. The process of change that occurs to animal and plant species over a long period of time, or how plant and animal species have evolved from one another, is known as evolution.
Therefore, we can conclude that adaptations aid any hereditary traits that improve an organism's chances of survival.
LEARN MORE ABOUT EVOLUTION HERE:
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