Dogs and cats are animals that have many similar body structures but they do not mate with each other. these two animals are classified in (1) the same kingdom and the same species (2) the same kingdom, but different species (3) different kingdoms, but the same species 4) different kingdoms and different species

(2) the same kingdom, but different species

Explanation:

Living organisms can be classified in five kingdoms: Monera, Protista, Fungi, Plantae, and Animalia.

Dogs and cats are classified in the Animalia kingdom, as they are composed of cells that are eukaryotic, have means for locomotion, and acquire nutrients by ingestion.

However they are classified as different species because they do not mate with each other.

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

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a) the particles of the chair are strongly held together.