Answer: Option B
Explanation: The first line of defense acts a barrier and does not allows the foreign materials to enter inside the body. It includes chemical and physical barriers that are always ready to protect the body from infection.
Example: Skin and mucous membrane.
Skin is largest organ and it acts as a barrier between pathogens and human body. It acts a waterproof material and the pathogens cannot get inside through skin unless the skin is broken.
Mucous membranes also acts as first line of defense and breaks the cell wall of many bacteria entering through the openings of the body.
So, skin and mucous membrane are the first line of defense.
Answer:
A
the carrying capacity will increase to accommodate the frog populatiom
Bees wax is biotic.
Biotic means something that is related to or resulted from living things. Bio means life. Bees wax are produced by honey bees. It comes from a living thing, thus, it is biotic.
Water, temperature, and snow are all abiotic. Abiotic means "no life" or nonliving. They are not derived from any living thing.
<h2>Specialists and Generalists </h2>
Explanation:
Niche is the role played by an organism that how it lives in an environment
Specialists
- Species that have narrow niches are called specialists and this type of niche is called realized niche
- It is narrow because of the presence of ecological barriers and is the space where a species actually lives
Generalists
- Species that have broad niche are called generalists and this type of niche is called fundamental niche
- It is larger than the realized niche due to absence of ecological barriers
- It represents all the environmental conditions where a species is able to live or can live
