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Anatomical Adaptations

The body of animals is covered with hairs, scales, feathers, shells or spines.These help the individuals to stay warm, protect the organisms from predators, make the organisms waterproof or protect the organism from damage.Camouflage is a protective adaptation. The body colour of an organism allows it to blend in with its surroundings.This is advantageous to prey because it makes it difficult for predators to spot the prey.
Camouflage is also an advantage to predators as it makes it difficult for prey to spot the predators.The type of teeth an animal has is related to its diet.Mimicry offers protection to harmless organisms.Copying the behaviour, appearance or sounds of a dangerous or poisonous organism can deter predators.Marram grass is a xerophyte that lives on sand dunes.
Xerophytes live in places where there is little water.Adaptations to reduce transpiration include a thick waxy cuticle, rolled leaves, sunken stomata and hairs on the inner surface of leaves.

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Specification: OCR Biology A (H020), AS-level, 4.2.2 Classification and evolution. Topic: Classification and Evolution.

Key terms in this lesson

mitosis
Nuclear division producing two daughter nuclei that are genetically identical to the parent nucleus, used in growth, repair and asexual reproduction.
pathogen
A microorganism that causes disease.
antigen
A molecule, usually a protein, on the surface of a cell or pathogen that triggers an immune response.
antibody
A Y-shaped protein (immunoglobulin) produced by B plasma cells that binds specifically to a particular antigen.
antigen-presenting cell
A cell, such as a macrophage, that displays a foreign antigen on its surface combined with a major histocompatibility complex molecule, activating T helper cells.

More in Classification and Evolution

All 36 lessons in Classification and Evolution · All OCR AS-level Biology topics