Why are nonnative species a threat to biodiversity? A. They often use up resources that other organisms need
B. They are not able to successfully breed in the wild
C. They release pollution into many environments
D. They easily contract and spread diseases to other organisms

A. They often use up resources that other organisms need.

Explanation:

Invasive alien species are animals, plants, fungi and microorganisms entered and established in the environment from outside of their natural habitat. T

hey reproduce rapidly, out-compete native species for food, water and space, and are one of the main causes of global biodiversity loss.

hydrocarbons are organic compounds that contain only hydrogens and carbons. they can be saturated (those which contain only carbon-carbon single bonds) or unsaturated (those which contain carbon-carbon double or triple bonds) in nature. hydrocarbons can undergo several reactions like substitution, elimination etc.  

on substituting one or more hydrogen atoms in hydrocarbon it results in the formation of haloalkane. as the halogen atoms are large compared to the carbon and hydrogen atoms, due to which the molecular weight increases and the bond become polar because of presence electronegative halogen atom and results in the increase in boiling point of the haloalkane.

thus, the correct option is (b) that is the boiling point of the new compound increases on substituting a hydrogen atom with a halogen in a hydrocarbon.

un recipient conține 6,4 moli de gaz. gazul hidrogen reprezintă 25% din totalul kilometrilor din container. în cazul în care presiunea totală este de 1.24 atm ceea ce este