Tissues — Science STD 9 — Question

Set up an experiment to measure gain and loss of heat by water, sand arld air.

Several embryos can be produced at a time in a single cow by the process of:

1. Hybridization.
2. Artificial insemination.
3. Embryo transfer.
4. Random mating.

Which of the following tissues are composed of mainly dead cells?

1. Phloem
2. Epidermis
3. Xylem
4. Endodermis

Which is the most important source of food and fodder?

1. Algae
2. Fungi
3. Lichen
4. Cereal

Which one of the following nutrients is not available in fertilizers?

1. Nitrogen
2. Phosphorus
3. Iron
4. Potassium

In binomial nomenclature consists of two words:

1. First alphabet of generic name.
2. All alphabet of generic word.
3. First alphabet of specific word.
4. All alphabets of specific word.

Give an account of various sources and harmful effects of water pollution.