Cartilaginous fish, such as sharks and rays, have gill slits that open directly to the outside, unlike bony fish.

Ice on top of water insulates the water below, preventing it from freezing and allowing aquatic animals to survive in the liquid water beneath.

Marine fish are a source of iodine, an essential trace element.

Fish use gills to extract oxygen from water, allowing them to breathe underwater.

Yogurt contains live bacteria, particularly probiotics, which are beneficial for digestion.

Cloning is a form of asexual reproduction where an organism is created from a single parent, resulting in a genetically identical copy.

Tissue culture technology is primarily used to grow new plants from small tissue samples, often to produce seedlings or to regenerate plant organs.

Chromosomes are structures made of DNA that carry genes, which are responsible for hereditary traits.

DNA (Deoxyribonucleic acid) is the molecule that carries the genetic information and is the chemical constituent of genes.

Flowers and fruits become colorful due to the presence of Chromoplasts. This chromoplast is produced from the cell called Chloroplast that produces glucose in the process of photosynthesis with the help of light. Flowers always attract insects, but due to the lack of light at night, insects’ eye sight becomes feeble and see colorful flowers as black. So naturally night blooming flowers have less presence of chromoplasts. As a result, the color of such flowers is white instead of being colorful and has a strong aroma so that insects are easily attracted.