The Cambrian Explosion is when diverse animals were first recorded as fossils.
The answer is "D"
The body's first line of defense is also known as Innate immunity and incudes mucous membranes. Both the intact skin and mucous membranes of the body offer a high degree of protection against pathogens.
A good example is the mucous membrane of the respiratory tract. It is lined up with cilia and covered with mucus. The coordinated beating of the cilia drives the mucus up to the nose and mouth where the trapped bacteria can be expelled.
(Lymph nodes and white blood cells belong to the second line of defense, not the first)
Answer:
Hilum.
Explanation:
Hilum may be defined as the type of the depression or the fissure and may present in kidney known as kidney hilum, present on spleen and the lungs. This is also known as hilus.
The hilum marks the entry and exit of the nerves and the blood vessels. The lung hilum is a triangular like depression through which the blood vessels, capillaries and the nerves enter and leave in the lungs and connects the other organ of the body.
Thus, the correct answer is option (d).
Answer:
Add native plants to a suburban garden because you are adding already flourishing wildlife
Sea Urchins are primary consumers because they eat the kelp
Sun -> Grass -> Rabbit because grass lives off of photosynthesis from the sun and rabbit eats the grass
I think there would be more biomass in grass because there is a lot more spread throughout the savannah while elephants are way bigger there is less of them.
