Over long periods of time, living things have gradually altered as the conditions around them change. A species' strongest traits are passed from one generation to the next. This is what evolution is, the process of gradual change.
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2.Allergens cause an allergic reaction. T<span>heir immune system produces antibodies, that are triggered depending on what substance it is.
3.Asthma is classified as an allergy because substances may trigger asthma and sometimes they do not, just like how certain substances cause the allergies.
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Answer:
C) heat
Explanation:
An ecosystem comprised of biotic and abiotic factors interacting together, in a specified environment.
trophic levels of this ecosystem is the food chain or the level an organism is in the feeding level, this range from producer to tertiary consumer.
If we follow the pyramid of tropic level known as " Energy level" Heat is lost to the environment at each of the trophic levels of the ecosystem. The producer which has large area of the pyramid has a large energy, and as the primary consumer(second tropical level) which are herbivores feed on the producer(first tropical level)grass , it only takes just like 10% energy from the producer and the secondary consumer ( third tropical level) herbivores feed on primary consumer, and only get away with 10% of the energy and as the trend goes up the "Energy keep decreasing inform of heat" like that.
Answer:
<em><u>Commensalism</u></em>=Birds that live among cattle to eat insects stirred up by grazing. it
<em><u>Commensalism</u></em>=An Egyptian plover eating bugs off of a giraffe or rhino.
<em><u>Parasitism</u></em>=A tick living on a dog drinking its blood
<em><u>Predation</u></em>=A bear catching and eating a salmon from a river.
<em><u>Predation</u></em>=A bobcat catching and eating a rabbit.
<em><u>Mutualism</u></em>=A clown fish living in the tentacles of an anemone protected from predators.
<em><u>Mutualism</u></em>=Bees gathering nectar and then spreading pollen from a flower.
<em>Parasitism</em>=A tapeworm living in the digestive system of a horse.
