Answer/Explanation:
Types of reproductive isolation include: temporal, ecological, mechanical, and behavioural.
A snail with a flat disc-like shell will not be able to mate with a snail having a conical shell - this is an example of mechanical isolation, where the animals are physically unable to mate due to incompatible body shapes and sizes.
The reproductive organs of male bush babies do not match with the reproductive organs of females of other bush baby species. - this is another example of mechanical isolation, as the sexual organs will physically not allow reproduction between these species
The mating call of a cricket is not recognized by a cricket of other species - this is an example of behavioural isolation, which results from incompatible mating rituals. I.e. the animals do not respond to each others mating behaviours
The signals sent by a male firefly are not recognized by the female firefly of other species. - this is also an example of behavioural isolation.
Temporal isolation is where species cannot interact because they do not have the same mating seasons or are not active at the same type of day. ?Ecological isolation occurs when two species do not come into physical contact to one another because they access different areas of the habitat. E.g. mating zones, food sources or nesting sites.
<span>Catfish and carp require less oxygen than trout. The mouth of a river usually has less oxygen and the area closer to the source has more oxygen, so since catfish and trout require more oxygen they typically are found at the source.</span>
A gene on a chromosome lies close to another gene controlling a different trait. This indicates that the genes are strongly linked . The first gene contributes to the expression of the second gene. This indicates polygenic inheritance.
Answer:
The sample most useful in identifying the person who committed the crime will be fingerprint. Fingerprints are the impression of finger ridges left on the surface of an entity or area in a crime scene. No two individuals can have same fingerprints. No two fingers of a same individual can produce same fingerprint. These are not found to be similar in identical twins. Fingerprints can be collected from porous and non--porous surfaces. These can be collected easily from crime scene. These fingerprints can be matched with specimens obtained from victims or offenders in order to establish the identity. The physical fingerprint analysis is more superior than DNA fingerprinting as in DNA fingerprinting the results obtained from twins could be similar but physical fingerprints cannot be similar because of different ridge characteristics. Therefore, valuable technique for identification of person who committed the crime.
