The release of histamines does not cause infection in the affected area. It is the bacterias which are the ones responsible for infections, for illnesses such as strep throat, urinary tract infections and tuberculosis.
Answer:
4600-4500 million years ago, the Earth formed and its crust cooled to become solid. 4500-4400 million years ago, the oldest known thing to have formed on Earth, zircon, formed along with solid crust and oceans. 4200-4100 million years ago, the close of the Hadean Period (there are no surviving rocks).
Explanation:
Tall, perennial grasses and herds of grazing herbivores are inhabitants of tropical and temperate biomes and not desert biomes.
Deserts do not support the growth of perennial grasses and a sustained herd population.
- A desert is an arid landscape with very little to no rainfall through the years.
- Plants needs water to manufacture their food and live.
- Since this condition is absent, they cannot thrive in such biomes.
- Grazing herbivores needs a lot of grasses to satisfy their foraging and ruminant nature.
- Since grasses are lacking, they cannot survive.
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Answer:
Plant and animal cells.
Explanation:
Found in every eukaryotic cell.
Answer:
A
Explanation:
Living organisms adapt to their moves and positions in response to the environmental changes for their protection or to their advantage. When an entity reacts to the changes in its surroundings, it is referred to as stimulus while the reaction to the stimulus is referred to as a response. Common stimuli are sound, light, air, heat, smell, taste, water and gravity.
Think of burning your finger of fracturing your bone without any pain sensation. It may certainly sound like a superpower or an ideal situation, however, when it comes to the standpoint of survival, it can be disastrous.
It is a characteristic behaviour of living entities to respond to stimuli with the intervention of the Nervous System. It is an organ system ascribed to send signals from the spinal cord and the brain throughout the body and then back from all the body parts to the brain. Neuron acts as the mediator and is the basic signalling unit of the Nervous system.
Pain is the body’s way of letting us know that something is not right. It can prevent further injuries or push us to seek medical attention. Moreover, all of this is possible because humans can respond and react to stimuli due to control and coordination among the various organs and organ systems.
Control and Coordination in simple multicellular organisms take place through only the Nervous system which coordinates activities of our body. It is the control system for all our actions, thinking, and behaviour.
