17. Which of the following statements is/are correct?
A. Leeches are members of the phylum Platyhelminthes
B. All platyhelminthes are parasites of other organisms.
C. Most, if not all, Platyhelminthes lack a coelom.
D. Given the following on the organism:
I. An animal
II. Multicellular
III. has tissues (diploblastic)
IV. Lacks a digestive tract
V. is asymmetrical
This organism could be a member of the Phylum Platyhelminthes
E. Platyhelminthes can not reproduce sexually

Option C .

Explanation:

Phylum platyhelminthes are flat worms. They have soft, unsegmented body. They are aceolomate I.e. lack body cavity. Flatworms are bilaterally symmetrical and are tripoblastic I.e they have three germ layers. Flatworms are mostly parasitic with few free living.

Their body is dorsal ventrally flattened. They are hermaphrodites I.e they have both male and female sexual organs and can reproduce sexually and asexually.

surface mining destroys mountain tops, landscapes, forests and wildlife habitats. on top of that, it leads to soil erosion and destruction of agricultural land. the landscape changes can also disrupt river channels and streams, which leads to flooding. which, can destroy plant life and other animals as well.

explanation:

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation: