The pipettes can basically be characterized into five grades. these grades includes the serological, disposable, repeat, single channel and multi-channel pipette. The guidelines for the usage of each of these pipettes differ. However, some instructions are common, such as the control of the flow of liquid. The index finger is used for the purpose of controlling the flow of the liquid from the pipette.
Hence, the answer is 'index finger'.
Answer:
When a ball accelerates toward bottom it experiences both rolling friction and air resistance.
Explanation:
- When the ball rolls from the hill the gravitational force of attraction comes in action and accelerates the ball toward the bottom of the hill.
- This motion of ball is the rotational motion, rolling friction acts on it due to rotational motion.
- As the velocity of the ball increases air resistance also starts to have significant effect on its motion.
- These two forces try to oppose the motion of the ball.
It is a measure of both species richness and species evenness, or how naturally diverse a specific habitat is. The higher the biodiversity, the larger the ecosystem.
Species richness-number of individuals of a population in a habitat.
Species evenness-number of different populations in a habitat.<span />
<span>Human immunodeficiency virus is spread by contact with bodily fluids. While most often transferred through sex or blood, it can not be spread simply by kissing another person unless you have a cut in your mouth.</span>
