Explanation

A light microscope can magnify up to 1000x (typical maximum), resolving structures as small as 0.2 micrometers.

This is ~1000x sharper than the naked eye (which resolves ~0.2 mm).

Explanation

Equisetum is commonly called horse-tail due to its brush-like appearance.

It belongs to Pteridophytes.

It is a living fossil.

It is found near wetlands.

Explanation

Hirudinaria is a genus of leeches, which are segmented worms.

Leeches belong to the phylum Annelida, known for segmented bodies.

Explanation

Parasites are classified as ectoparasites (living on the surface) and endoparasites (living inside the host).

Both types represent different forms of parasitic symbiosis with their hosts.

Explanation

Blood type O has no A or B antigens on the surface of red blood cells.

That's why type O is known as the universal donor in blood transfusion.

Explanation

In isometric contraction, muscle length remains the same while tension increases.

No visible movement occurs, as seen in activities like holding a plank or pushing against a wall.

Explanation

Amphibians, such as frogs and toads, have a 3-chambered heart.

- The three chambers are:

    1. Two atria (upper chambers)

    2. One ventricle (lower chamber)

Explanation

The cell is the basic structural, functional, and biological unit of all living organisms, including animals and humans.

It is the smallest unit of life that can replicate independently.

Explanation

Funaria is a moss, and mosses belong to the class Bryopsida.

It is a non-vascular, spore-producing plant typically found in moist, shady places.

Explanation

Nickel is a micronutrient essential for the activity of the enzyme urease, involved in nitrogen metabolism.

It helps in converting urea into usable forms of nitrogen for plants.