Improvement in Food Resources — Science STD 9 — Question

Which among the following statement is true?

Balanoglossus belons to Hemichordata which forms a connecting link between:

1. Urochordates and cephalochordates.
2. Urochordates and vertebrates.
3. Cephalochordates and vertebrates.
4. Nonchordates and chordates.

Matrix of connective tissue is produced by:

1. Plasma cells
2. Mast cell
3. Fibroblasts
4. Both (b) and (c)

Molecular compounds are usually formed by the combination between:

1. A metal and a non-metal.
2. Two different non-metals.
3. Two different metals.
4. Any two gaseous elements.

A water drop falls at regular intervals from a tap 9m above the ground. The fourth drop is leaving the tap at the instant, the first drop touches the ground. How high is the third drop at that instant?

Which of the following has the highest n/p ratio:

Amoeba acquires its food through a process, termed:

As an object falls, its ______ energy changes into ______ energy:

Which cell organelle plays a crucial role in detoxifying many poisons and drugs in a cell?

Plasmolysis occurs due to:

1. Absorption.
2. Endosmosis.
3. Osmosis.
4. Exosmosis.