Answer:
Atmospheric nitrogen is "fixed" by bacteria.
Explanation:
Nitrogen gas (N2) is the most abundant in the earth's atmosphere, representing 79% of air volume. In organisms, nitrogen atoms are part of several organic substances, such as proteins and nucleic acids. However, most living things cannot use nitrogen in the N2 molecular form. Only a few species of bacteria are able to use it by incorporating nitrogen atoms into their organic molecules and making it available in other molecular forms for use by various species through a process called Biological Nitrogen Fixation. Similarly, the bacteria that perform the fixation are called nitrogen fixers.
Answer:
Sugar and nutrients.
Explanation:
Culture media are chemical compositions created in the laboratory that provide all the necessary resources for the creation of microorganisms in vitro. In short, the culture media provide adequate food for microorganisms to grow and be analyzed and studied.
The culture media can have a liquid, solid or semi-solid consistency, however it is important that regardless of cosistence, they all have in their composition sugars (which will provide carbon and energy for the microorganism) and nutrient (so that they grow nourished and strong).
Answer:
Explanation:
If the lipid bilayer is at least 108 times less permeable to K ions than it is to water, then a way that this much needed ions can get into the cell is through ion channels.
Ion channels are memberane proteins that form pores and they also span across the cell membrane allowing ions to pass through these pores. They act as a passage through which charged ions can pass through. There are three main type: voltage-gated, extracellular ligand-gated, and intracellular ligand-gated ion channels.
Answer:
1. Skin, nails, hair, exocrine glands.
2. Epidermis is the top layer of the skin, the part of the skin you see.
Dermis is the second layer of skin.
Subcutaneous fat is the bottom layer.
3. Temperature (thermoreceptors)
Pressure (mechanoreceptors)
Explanation: me being a smarty pants
Answer:
The answer is TRUE
Explanation:
The statement is about the Tight Junctions. It is true.
