The use of restriction enzymes and electrophoresis to generate a map of the DNA molecule is known as RESTRICTION MAPPING. This technique is used to map an unknown fragment of DNA.
Restriction enzymes are enzymes that cut a DNA fragment at specific nucleotides sites, thereby generally smaller fragments of DNA.
Restriction mapping is a strategy used to map unknown fragments of DNA by digesting them into smaller fragments and then identifying the specific sites of the DNA breakpoints.
Restriction mapping can then be used to create a diagram of fragments of DNA marked with specific sites where they are cut by specific restriction enzymes.
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Answer:
The crab has just molted and the new exoskeleton has not yet hardened.
Explanation:
Crabs have an exoskeleton or shell which protects and supports them. From time to time crabs molt i.e. they discard the old exoskeleton and begin forming a new one. This process is a part of their normal growth. Soft-shell crabs had recently undergone molting and the new shell had just started to form. Hence, it has not hardened completely and is comparatively soft. Soft-shell crabs are in popular demand because it is easier to remove the soft shell and access the meat as compared to the normal crab.
Answer:
a
Explanation:
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If they both have Rr. The possibilities will be RR, Rr, Rr, rr. They have a 25% chance of inheriting the recessive trait instead of their dominant trait. That means that these traits are hidden and not expressed in the previous generation.
A tolerance curve is the range of conditions which show how
an organism can live and function. It is a graph that will show the organism’s
activity in certain environmental conditions. There are different species all
over the world and each of them has certain environmental conditions which it
can best survive and reproduce. These are the conditions which the species has
best adapted. These conditions may include physical factors in the area such as
temperature, humidity, soil chemistry, pH, salinity and oxygen levels.