Chromosomes are thread-like structures in cells containing DNA. They carry genetic information, determining an organism’s traits. Humans have 23 pairs, with one set inherited from each parent.
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Fruits are mature ovaries of flowering plants, containing seeds. They develop from fertilized ovaries and serve as a means for seed dispersal. Fruits come in various types, shapes, and flavors.
Ozone is a molecule composed of three oxygen atoms. It forms a protective layer in Earth’s stratosphere, blocking harmful ultraviolet radiation. Ground-level ozone is a component of smog and can be harmful to health.
Herbivores are animals that primarily consume plants, while carnivores are meat-eating animals that primarily feed on other animals. Their dietary preferences are adapted to the types of food they consume.
Veins are blood vessels that carry deoxygenated blood back to the heart. They have thinner walls than arteries and often contain valves to prevent blood from flowing backward.