Explanation

Chlorella is a unicellular green alga, meaning the entire organism consists of a single cell.

Bacteria are also unicellular but are prokaryotic, while Chlorella is eukaryotic.

Viruses are not made of cells at all.

Explanation

Active transport moves molecules against the concentration gradient, which requires energy (ATP).

Passive transport and facilitated (not vacillated) transport do not require energy.

Explanation

The word zoology comes from the Greek words "zoon" (meaning animal) and "logos" (meaning study).

So, zoology means the study of animals in Greek origin.

Explanation

Abscisic acid is a plant hormone that regulates processes like dormancy and stomatal closure.

It helps plants respond to stress conditions like drought.

Explanation

Seahorse is a true fish; it has gills, fins, and lives in water.

Jellyfish, cuttlefish, and starfish are not true fish despite their names.

Explanation

In 1796, Edward Jenner successfully used material from cowpox to vaccinate against smallpox.

This was the first successful vaccination in medical history.

Explanation

Vitamin K is essential for the synthesis of clotting factors in the blood.

Its deficiency leads to prolonged bleeding or poor blood clotting.

Explanation

According to Lamarck, the evolution of long necks in giraffes is explained by the stretching of necks over generation

Lamarck's theory, known as the inheritance of acquired characteristics,

Postulated that traits developed during an organism's lifetime, like a giraffe stretching its neck to reach higher food,

Could be passed on to their offspring, resulting in a gradual elongation of necks over generations.

However, modern scientific evidence does not support this theory. 

Explanation

The biosphere is the global ecological system integrating all living organisms (biotic) and their interactions with the non-living (abiotic) components (e.g., air, water, soil).

It spans from the deepest oceans to the atmosphere, encompassing all ecosystems where life exists.

Explanation