Explain what is going on here and how are both passages different in the sense of how the organism is modified by its surroundings?The whatsit lives in woods. It s hunted by men and larger animals. Most whatsits are born with white fur, making them easy to spot amongst the trees. Some whatsits are born with brown, speckled fur. These are far more difficult to spot. Since they are easier targets for hunters, far more white whatsits are hunted and killed than speckled ones. Each time a speckled one mates with a white one, half the offspring are speckled. Eventually the amount of white furred ones available to breed is smaller than the number of speckled ones. More offspring are born with speckles than with white fur.

A group of people lives in village Somewhere. In the village a large number of children die each year, after being attacked by wild animals. The villagers can make changes to their environment and behavior in order to protect the children. They can build fences around the village. They can make traps to catch the animals. They can ensure that the children only go out in groups, protected by armed adults.

adaptation [ dap tysh'n, ddp tysh'n ] (plural adaptations) or adaptatation [ dpshn ] (plural adaptions) or adaption

1. change to suit environment:the development of physical and behavioral characteristics that allow organisms to survive and reproduce in their habitats.

2 Types of AdaptationsStructural A characteristic or modification in an animal's body that helps it survive in its habitat. Its GENETIC they do not develop during an animal's life but over many generations. Examples: The shape of a bird's beak, the number of fingers, color of the fur, the thickness or thinness of the fur, the shape of the nose or ears are all examples of physical adaptations which help different animals to survive. Camouflage,

Another structural adaptation

2. Behavioral The particular behavior of an animal-such as the way it feeds, mates, breeds, or migrates that helps it survive in the unique conditions of its environment.

Example: Birds fly south in the winter because they can find more food. Social behavior (if an animal lives by itself or in a group) such as dolphins and elephants. Another type is behavior for protection.

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Battle at kruger

Adaptations in the Bay Dealing with saltwater

Estuary ecosystems are influenced by the input of salt water through ocean inlets. Because of this, several animals that feed in this system have adaptations that allow them to tolerate brackish water and saltwater.

Aquatic invertebrates live in the bottom parts of our waters. They are also called benthic macroinvertebrates, or benthos, (benthic = bottom, macro = large, invertebrate = animal without a backbone) and make good indicators of watershed health.

1. Birds are osmoregulators, defined as the ability to maintain internal salt concentrations at a constant value by discharging salt through special glands located above the eyes. Many bird species are capable of eliminating fluids equal to 15% or more of their body weight each day. Salt glands are what allow many seabirds to maintain themselves on diets of marine prey and seawater

2. Mussels feed by filtering out the detritus and minute plants that hang in suspension in the water. anchor themselves to each other or to rocks, and keep their shells closed to avoid drying out.

3. Polychaete worms build tubes to live in; the tubes are strengthened with mucous and are firmly anchored in the sand.

4. Limpets use its large shell in bulldozer fashion to push invaders away, and also are able to raise themselves up in order to "stop on" the front of the predator's foot with its shell.

5. Cordgrass can cope with salinity and with periodic exposure to the air. It filters most of the salt out at the root. Any salt that does seep through is excreted by glands on the leaves. The same pore that ooze salt and served a respiratory function, breathing in supplemental oxygen and passing it back to the roots. When the tide submerges the leaves, the breathing holes close to keep the plant from "drowning.

6. Pickleweed has an unusual way of getting rid of excess salt.Pickleweed has joints which allow a part of the plant to be broken off. The plant sends salt to its tips, and these portions break dry up and break off during the fall season.

7. The annelid worm and the bivalve mollusk have special adaptations to help them burrow into the sand. They can change the shape of their bodies, and push and pull their way through the sand. The worm leads with its head, and the mollusk with its foot.