The answer is D because the universe is always expanding
Since the two species co-inhabit the same habitat, habitat isolation can be disregarded as a factor keeping the two species separate. There are however some other broad categories of mechanisms for <span>reproductive isolation. One is behaviour. Many birds in particular have very specific mating rituals, including mating dances, particular bird song, the development of specific mating plumage, the release of specific pheromones and the building of a particular nest structure. Another broad category is mechanical isolation. You will find that the genital organs of particular species are very specific, and preclude other close species from successfully mating. Another broad category is gametic isolation. For most species combinations, it is not possible for the gametes to fuse successfully to form a hybrid. If hybrid games do fuse, in many cases, the hybrids are sterile, such as mules for example. </span>
Answer:
stem
Explanation:
because the branch is connected to the tree and the branch has stems that have leaves on them
The purpose of saliva serves in digestion is to breaks down complex carbohydrates. The correct option is (A).
<h3>What is saliva?</h3>
Saliva is a transparent liquid secreted by glands present in the mouth. Saliva is an important secretion for the digestion of food in the mouth.
It is made up of water and many digestive enzymes are present in the saliva, which help in digestion of complex carbohydrate like starch.
Thus, the correct option is A) breaks down complex carbohydrates.
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Answer:
Explanation:
The closed metal container will get distorted or compressed due to a combination of two reasons:
1.<em> contraction of the metal container as a result of a reduction in its temperature.</em>
2. <em>a reduction in the pressure inside the container caused by a sudden drop in the temperature of the water inside it. </em>
The tap water causes a reduction in the temperature of both the container and the water inside it. An increase in temperature causes metal to expand and a reduction in temperature causes it to contract. Also, water takes less space than steam. Therefore, a reduction in the temperature of the hot water causes a reduction in the pressure inside the container relative to the outside. This causes the metal container to be compressed.
