NURSING ANM AND GNM

Detailed explanation-1: -Smaller cells have a large surface area compared to cell volume, while larger cells have a reduced ratio of surface area to volume. One reason why bacterial cells are so small is that they need a large surface area to cell volume to take in nutrients. Bacteria accumulate nutrients from the environment by diffusion.

Detailed explanation-2: -Because bacteria are prokaryotic, they do not have a nucleus and no membrane-bound organelles. In contrast, plants and animals are made up of eukaryotic cells, which means they have a nucleus and membrane-bound organelles like mitochondria or golgi apparatus.

Detailed explanation-3: -Animal and plant cells are a lot larger than bacteria cells. Bacteria cells usually exist as single-celled organisms, while animal implant cells exist as multicellular organisms. Three unique features of bacteria cells compared to eukaryotic cells are that bacteria have peptidoglycan in their cell wall.

Detailed explanation-4: -Cell size varies depending on where it comes from and what it does. This means that a bacterial cell is smaller than an animal cell, a human red blood cell is smaller than a human nerve cell and all of these are smaller than the single-‐celled, 15cm long ostrich egg!