Projections on the surface of a virus allow them to attach themselves to the cells of other organisms.
Answer:
The correct answer is - leverage.
Explanation:
Skeletal muscles involves leverage which is the ability to move an object with the help of the lever,. In human body leverage is work as the joints are fulcrums, and the bones act as levers.
Muscle contraction provides the effort that is applied at the point of the origin in the bone. Changing the magnitude and direction of forces created by the skeletal muscles is an representation of the skeletal function of leverage.
Thus, the correct answer is - leverage.
Therefore I conclude that it is better for the <span>student talked to one group of plants and hand watered them as it shows higher progress compared to the students that did not talk to the plants. </span>
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N an experiment, suppose that the wings of fruit flies were clipped short for fifty generations. The fifty-first generation emerged with normal-length wings. This observation would tend to disprove the idea that evolution is based on
a. inheritance of natural variations
b. inheritance of acquired characteristics
c. natural selection
d. survival of the fittest
Inheritance of acquired characteristics. Thus, option "B" is correct.
<h3 /><h3>What is inheritance of acquired characteristics?</h3>
For fifty generations wings of fruit flies were clipped. Hence they acquired this trait in their lifetime and not genetically. If acquired characteristics were capable of passing on to next generation, 50 generations would have been enough to inculcate this clipped wing trait in fruit flies. Despite it, the fifty-first generation did not have clipped wings.
Hence evolution can not occur without genetic variation. A character simply acquired in a lifetime does not create a difference in germ cells and hence is not enough to be passed on to next generation or cause evolution
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The answer is B- Embryological Development.