Answer:
The correct answer is B. Worms move through changes in body structure caused by contraction of muscles compressing their watery fluid.
Explanation:
The hydroskeleton consists of a fluid-filled cavity, surrounded by muscles. The fluid pressure and the action of the muscles that border it, serve to change the body's shape and produce a movement such as digging or swimming. The successive contraction of various metamers, which are provided with bundles of circular and longitudinal muscle fibers, stretching and thickening parts of the body, allow it to move horizontally. Hydrostatic skeletons have a role in the locomotion of annelids, nematodes and other invertebrates. The hydroskeleton has similarities with the hydrostatic muscles.
Differential reproduction means that some organisms in a population produce more offspring than others.
Differential reproduction refers to the difference between individuals in a population and how many offspring they are able to leave.The best adapted organisms to a given environment will leave more offspring than those who are not well adapted. Differential reproduction depends on the natural
Two abiotic forms of carbon are CARBON DIOXIDE AND METHANE.
The element carbon is continuously been recycled in nature. The abiotic components of the carbon cycle refers to the non living part of the carbon cycle which has influence on the living part. Methane is a type of fossil fuel whose major component is carbon.
The chemical formula of carbon dioxide is CO2 while that of methane is CH4.
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Answer:
<u><em>True</em></u>
Explanation:
<u><em>Most gymnosperms have reproductive structures called cones. Male cones produce pollen. Female cones contain at least one ovule. An ovule is a structure that contains an egg cell. After being fertilized, the ovule develops into a seed.</em></u>
