Partial Parasite

Partial parasites are organisms that depend on other living organisms, known as hosts, for their survival and reproduction. However, unlike full parasites, partial parasites do not completely rely on their host for all their needs. Partial parasites can produce their own food through photosynthesis or obtain some of their nutrients from the environment.

Examples of Partial Parasites

1. Mistletoe: Mistletoe is a partial parasite that attaches itself to the branches of trees. It obtains water and minerals from the host tree but can also produce its food through photosynthesis.

2. Dodder: Dodder is a partial parasite that grows on other plants and attaches itself to them using suckers. It obtains water and nutrients from the host plant but can also produce its food through photosynthesis.

3. Orchids: Some orchids are partial parasites that obtain nutrients from fungi in the soil. They can also produce their food through photosynthesis.

Advantages and Disadvantages of Partial Parasites

Advantages:
- Partial parasites can survive in environments where other organisms cannot, such as in areas with low nutrient availability.
- They can obtain nutrients from a variety of sources, making them adaptable to different environments.

Disadvantages:
- Partial parasites can still harm their hosts, as they may compete with them for resources.
- They may also be more vulnerable to environmental changes, as they rely on both their host and the environment for their survival.

Conclusion

Partial parasites are organisms that depend on other living organisms for their survival but can also produce their food. Examples of partial parasites include mistletoe, dodder, and some orchids. These organisms have both advantages and disadvantages and are adaptable to different environments.

A plant which depends on its host for only water and nutrients, but not sugars is a partial parasite. They do not depend on the host for food as they are usually chlorophyllous, so they are able to photosynthesize. So, the correct option is 'Absorbs water and mineral salts from host'.