The first line of defence (or outside defence system) includes physical and chemical barriers that are always ready and prepared to defend the body from infection. These include your skin, tears, mucus, cilia, stomach acid, urine flow, 'friendly' bacteria and white blood cells called neutrophils.
The answer is option one "true." Renewable resources are things that can be used repeatedly and can be replaced, which means it doesn't affect the environment. Renewable resources are like: Oxygen, water, wood, and paper all are are renewable sources. Nonrenewable sources are things that cannot be replace naturally which is because the formation of these sources takes millions even billions of years nonrenewable sources include: oil, coal, and some gases.
Hope this helps!
Short festival: = *
Short celebration:
Short celebration
Short Tsvah
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Good morning!! The purpose of both a dichotomous key and a field guide's purpose is to identify organisms. The only difference between the two is the a dichotomous key just uses descriptions to identify the animal with no pictures, but a field guide uses pictures to identify the organism. Another thing that separates the two is that the dichotomous key gives questions/descriptions that describe the organism, whereas the field guide uses a brief description of the animal. Hope I helped!!
Can you show an image of the question?
