Answer:
Protozoans are a single-celled microscopic animal of a group of phyla of the kingdom Protista, such as an amoeba, flagellate, ciliate, or sporozoan.
Protozoa is an informal term for a group of single-celled eukaryotes, either free-living or parasitic, that feed on organic matter such as other microorganisms or organic tissues and debris.
Scientific name : Protozoa
Higher classification : Eukaryote
Rank : Kingdom
<span>a protostar reaches a temperature high enough for nuclear fusion to begin.</span>
Answer:
Antarctic Peninsula.
Explanation:
The Antarctic Peninsula is the northernmost part of the mainland of Antarctica and is located at the base of the Southern Hemisphere.
Answer:
Option (A)
Explanation:
The cretaceous period formed the last period of the Mesozoic era, marked by the occurrence of some distinct major events, and it began about 145 million years ago and ended by about 65 million years ago. The name Cretaceous is actually derived from the Latin word 'Creta' which means “chalk”. Chalk usually refers to the white colored, soft, powdery limestone rock that is primarily comprised of fossil shells. These are basically dominated by the calcite minerals.
By the end of this period, the dinosaurs were completely wiped out from the earth and the flowering plants started to evolve after the mass extinction event, which is commonly known as the Cretaceous-Tertiary boundary (K-T boundary).
Thus, the name Cretaceous was given because during this time period, there was abundant deposition of marine limestones (chalk), depicting that the sea level was comparatively higher than the present day.
Hence, the correct answer is option (A).
