Crystals, good insulators, hard and brittle,conduct electricity, high melting and boiling points
Answer:
Mule is produced from a hybrid cross.
Explanation:
A mule is the offspring which is produced by crossing or mating of male donkey with female horse.
Where the male donkey is called Jack and female horse is called mare.
The offspring produced as a result is Mule.
The gender of Mules may be male or female but consists of 63 chromosomes.
But such produced Mules are sterile.
Answer:
Petroleum gas is mainly C3 and C4 based (propane and butane), whilst natural gas is predominantly C1 and C2 (methane and ethane). Petroleum gas is generally produced via the cracking of naphtha, which is one of the components separated during crude oil refining.
Explanation:
Answer:
A polygenic trait can be described as a physical trait which is influenced by more than one gene.
The three types of selection for a polygenic trait are:
1) Directional Selection: In a directional selection, one of the phenotype is favored in an ecosystem. As a result of this favoring, the allelic frequency changes and shifts in favor of this particular trait.
2) Stabilizing selection: It is a type of natural selection in which the intermediate trait is favored. The population carries a middle trait in abundance.
3) Disruptive Selection: Disruptive trait is a type of natural selection in which the traits on the extreme sides are favored. The intermediate traits are less favored.
