miércoles, 7 de octubre de 2020

NATURAL SCIENCE 07-10-20

 

Locomotion

Locomotion is the ability of moving common to many living organisms and which plays a key role in the search for food and in interaction.

- Flying: using wings (birds, insects and mammals, such as bats).

- Swimming: using fins. (such as fish, amphibians, some birds and some mammals, such as whales or otters).

- Running or jumping: using legs. They may have two, four, six, eight, or hundreds (such as insects, reptiles, birds, amphibians and mammals)

- Crawling: this is done by sliding along the ground (worms, snakes or snails)




Defence mechanisms

The defence mechanism is a part of the interaction function.


When an animal faces a dangerous situation, they use different defence mechanisms to defend themselves:

- Confrontation, when an animal faces the attack directly.

- Flight, fleeing is one of the most immediate forms of defence and follows innate patterns.

- Camouflage, using colours similar to the ground.

- Threatening colours or patterns, which discourage possible attackers and warn of possible danger.

- Mechanical protection, such as shells to hide in, or spines, needles or repellent secretions to discomfort the enemy.

- Grouping in colonies, as with some birds, which nest together for better defence.






Plants also have their own defence mechanisms to avoid being eaten or to survive in dry inhospitable areas, such as:

- Spines, which are extremely unpleasant if eaten or touched by an animal.

- Hard leaves, which are unappetising to herbivores

- Unpleasant flavour, which discourages hungry herbivores.

- Unpleasant odour, which produces a similar affect to the previous mechanism.

- Releasing sticky or stinging substances, which are very unpleasant to the attacker.