No because X and Y do not have D-cell
<span>A. Classical Conditioning
Little Albert was initially exposed to a variety of stimuli and displayed no fear towards them.
In the next step of the experiment, when Little Albert was again exposed to a rat, the experimenters hit a pipe to make a loud noise, causing Little Albert to cry. This pairing of the stimuli of loud noise and rat was continued repeatedly. After enough repetitions, Little Albert began to cry just by seeing the rat.
The experiment involved the unconditioned and conditioned stimuli and responses of classical conditioning.
Unconditioned stimulus: loud noise
Unconditioned response: fear
Conditioned stimulus: rat
Conditioned response: fear</span>
Answer:
<em>The correct option is B) a mushroom appearing wet in the rain.</em>
Explanation:
A response is generated when a living body detects a change or event as a signal or a stimulus.
In the option A, the Sun acts as a stimulus. The response is the tree turning its leaves.
In the option C, touch is the stimulus. The contraction of the protozoa is the response.
In the option D, the smell of food is the stimulus. Rumbling of the stomach is the response.
<em>In the Option B, no response is carried out by the mushroom. Hence option B does not show an action or response.</em>
Answer: Homo erectus DNA is too similar to ours to prevent contamination.
Explanation:
Homo erectus fossils are known as the oldest form of early humans that had human like body structure with shorter arms and elongated legs and shorter arms. These features gave them the ability to walk and also run long distances.
The reason that we do not have a genome sequenced from Homo erectus is that their DNA is too similar to ours to prevent contamination. There are enough fund which could have been used to carry out the research but their similarities to human beings has been the source of concern.
Answer:
Less energy is transferred at each level of the food chain so the biomass gets smaller. As a result, there are usually fewer than five trophic levels in food chains.
