Answer: In modern view, the origin of variation is mutation. Since Darwin stated that variation will occurs in the most useful part and is retained, most people don't use their left hands, if according to Darwin's theory, those left hands should be going to extinct by now.
If Darwin's theory of variation is acceptable, then dwarfs who always want to be giant, by stretching the body, would have become giant by now.
Darwin just had a general idea about variation, offsprings tends to change in appearance from the parents. But this variation is not in terms of usefulness of the body parts of the parents, it is in terms of Gene mutation of the parents in their offspring.
Explanation: Darwin's 1859 theory set out a theory of Evolution by natural selection to explain adaptation and speciation.
According to Darwin's theory, individual of one generation are qualitatively different from one another this is as a result of natural selection. But in modern science, this is as a result of Gene mutation.
Answer: YES
Explanation:
depression makes you feel like there’s no point in doing anything. For example you could want to go on a walk then think “what’s the point. I’m wasting time, and I’m not getting anything out of it, we’re all going to die, there’s no point.” He would be less proactive with things like that. He would be mostly careless about decisions because we’re all going to die, and there’s no point of doing anything.
- coming from someone with depression :)
Answer:
D. By adding the vectors
Explanation:
Given
Represent the velocity of the river current as VR
Represent the velocity of the boat as VB
Required
How to calculate the velocity of boat relative to river current
From the question, we understand that both move in the same direction.
So, the relative velocity V is calculated as:
Notice that the both velocities are added together to get the relative velocities.
This is so because they both move in the same direction
<em>From the list of given options, only option D is correct.</em>
