It has a job similar to a police officer who allows select people to enter and leave a crime scene.
Explanation:
The primary purpose of the cell membrane is to preserve the cell from its surroundings. The cell membrane manages the movement of materials in and out of cells and organelles. In this form, it is selectively perforable to ions and organic molecules. It is the same as of police officer or security guard that check the people and allow only a few to enter a specific place.
Answer:
it's the third answer because you separate the sequence every three letters
47 chromosomes instead of 46 because there are 3 chromosomes in pair 21. This is called Down syndrome, described most recently by Lejune in 1958
Correct answer: D). 4
All animals are eukaryotic, multicellular and possess a complex tissue. They are heterotrophs it means they do not prepare their own food, they eat living and dead organisms and they may be herbivores, carnivores, omnivores or parasites.
The five steps of nutrition in animals are ingestion, digestion, absorption, assimilation, and Egestion.
Hence, the most suitable answer would be option D.
