Explanation

Microscopy is the science or technique of using microscopes to view small objects.

Microscope is the instrument, while microscopy refers to the practice of using it.

Explanation

The nucleolus synthesizes rRNA (ribosomal RNA), which combines with proteins to form ribosomal subunits.

These subunits later form complete ribosomes in the cytoplasm for protein synthesis.

Explanation

Peptidoglycan (also known as murein) is a mesh-like polymer that makes up the cell wall of most prokaryotes, especially bacteria.

It provides rigidity and structural support, protecting the cell from osmotic pressure.

Explanation

A species is defined as a group of organisms that can mate and produce fertile offspring.

Organisms in different genera generally cannot produce fertile offspring.

Explanation

In 1969, Whittaker proposed a system of classification that divided all living organisms into five kingdoms:

1. Monera (bacteria and cyanobacteria)
2. Protista (protozoa, algae, and slime molds)
3. Fungi (mushrooms, molds, and yeasts)
4. Plantae (plants)
5. Animalia (animals)

Explanation

Deserts have harsh conditions (extreme temperatures, low water), supporting fewer species.

This results in lower biodiversity compared to forests or grasslands.

Explanation

Plants have two main systems: the root system and the shoot system.

The root system anchors the plant and absorbs water.

The shoot system includes stems, leaves, and flowers for photosynthesis and reproduction.

Explanation

Rough Endoplasmic Reticulum (RER) appears granular due to the presence of ribosomes attached to its surface.

These ribosomes are responsible for protein synthesis within the cell.

Explanation

Explanation

An extinct species has no living individuals left anywhere on Earth.

Endangered and threatened species are still alive but at risk of extinction.