Answer:
Nematocysts, the most widely used term to describe the “stinging capsules” characteristic of the phylum Cnidaria, constitute the best-studied and most diverse group of cnidae, the secretory products of cnidocytes. All cnidae consist of a collagenous capsule containing an eversible tubule.
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Answer:
See explanation below.
Explanation:
Mitosis is the duplication of cells in the bodies of plants and animals. All cells can undergo mitosis. Mitosis benefits the body by replacing cells as needed. The skin for example loses a lot of cells. Mitosis is when cells reproduce - and results in an exact copy - to replace the cells that are lost or need to be replaced for other reasons.
Meiosis is the duplication of cells that are not alike. In Mitosis, the duplicate cells are an exact copy, with a full exact copy of the body's DNA. In Meiosis, the new cells are different in that each one has half of the DNA - or half the number of chromosomes. Meiosis allows for the creation of cells that allows for sexual reproduction. Meiosis is the process that creates sperm and eggs. These cells are known as haploid cells - in that other cells are known as diploid, with full DNA and cells that have gone through the meiosis process have half and are known as haploid cells.
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Answer:
Because of the chemical and structural nature of the phospholipid lipid by layer the lipid soluble molecule can just pass the lipid membrane and some small molecules can also pass freely.
Explanation:
as we know that the homeostasis is an important process for a living cell to maintain it self so for the the exchange of materials between the external and internal environment is must so for that it exchange material with the outside environment of the cell.as the cell membrane is semipermeable(mean allow some molecule to pass(lipid soluble) and not others(lipid non soluble) to pass through the membrane.the cell membrane is selectively permeable due to its nature and chemical composition the chemical composition is lipid and phosphate and glycerol(head) with fatty acid that may b saturated or unsaturated(tail).so finally all those molecule which are polar can not pass through the membrane and non polar can pass the membrane.The size of the molecule is also a factor on which the permeability depends.