Answer:
Ur answer
Explanation:
If the bacteria grows for six hours each bacterium will divide <em>3 times/hour * 6 hours = 18 times.</em>
Every time the bacteria reproduce the number doubles.
They share similarities in their tissue and cartilage. Both humans and chickens have epithelial tissue, muscle tissue and connective tissues; as well as cartilage to support the joints between bones. The bone structure is similar as well. Both animals have a humerus, which connects the shoulder and radius. Unlike humans, chickens can't move their metacarpals. Chicken bones are also hollow, making them lighter and more built for flight. Our arms are made more for grabbing, lifting and picking things up.
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The answer is mucus.
A nonspecific defense is a type of defense in which the protection is always the same. It doesn't matter what the invader is. Physical barriers like the skin, the mucus secreated, protects us against invasion of microorganisms. The other options are specific defenses for a certain type of invador and will only work against them.
The Sun never moves, but the Earth rotates around it’s axis, making it look like the sun is moving, but it is really the Earth.
Answer:
Slow freeze-quick thaw is lysis protocol used widely for mammalian and bacterial cells. It works by dehydrating the sample through crystal formation.
Explanation:
Slow Freeze - Quick Thaw:
- A cell lysis procedure that involves slowly freezing cells in dry ice or ethanol or even liquid nitrogen (-196°C) and then quickly thawing them at room temperature.
- Slow freezing involves cooling below freezing point to form ice crystals in the extracellular environment. As water around the cell freezes, the presence of high concentration of solutes (salt and sugar) and cryoprotective agents induces a hypertonic environment outside the cell. This forces water outside the cell, consequently dehydrating it. Crystals also form in the cell wall, disrupting the cellular transport.
- Upon quick thawing, as the extracellular environment turns hypotonic, water rushes into the cells which swell up and burst due to osmotic shock.
