Aseptic techniques are used to prevent the contamination of the media and culture from the microbes present in the environment. Another reason for using the aseptic techniques is to prevent the microorganisms in lab to spread in the environment or infect the person working with them.
Passing the open end of a broth tube or a bottle through the flame after opening it and before recapping it because the flame of the Bunsen burner creates a current in the form of convection current and this forces the air inside out of the tube. The air borne contaminants are also prevented from entering the tube. The heat of Bunsen burner increases the temperature around the working area thus reducing the chances of air borne contaminants to damage the cultures.
Answer:
The importance to goblet cells and other glandular epithelia are to secrete mucus in order to protect the mucous membranes where they are found.
Answer:
The genotype of the original parents is pp PP
Explanation:
Let “P” represents the purple color allele of the flower of pea plant
and “p” represents the white color allele of the flower of pea plant
Genotype of homozygous purple flowered pea plant is represented by "PP"
Genotype of homozygous white flowered pea plant is represented by "pp"
a) First generation cross between a homozygous purple flowered pea plant and a homozygous white flowered pea plant
P P
p Pp Pp
p Pp Pp
All the offspring are heterozygous purple flowered pea plants
b) In second generation cross is taking place between two heterozygous purple flowered pea plants with genotype "Pp"
P p
P PP Pp
p Pp pp
Out of four offspring , one is white while rest three are purple flowered pea plant.
Hence, the genotype of the original parents is pp PP
The eyepiece lens<span> is so named because it is usually the </span>lens<span> that is closest to the eye when someone looks through the device. The </span>objective lens<span> collects light and brings it to focus creating an image.</span>
Answer:
They are found in all eukaryotic
Explanation:
Animal cell lack chloroplast