Aparticle can infect humans and make them sick. it attaches to a host cell and injects its rna, which the host uses to make proteins for the particle. this particle cannot reproduce on its own and can only copy itself by using the machinery of the host. which explains whether the particle described is a virus or a cell? a. the particle is a cell because it has genetic information and attaches to other cells. b. the particle is a cell because it does not make proteins and cannot reproduce by itself. c. the particle is a virus because it has genetic information and can infect humans. d. the particle is a virus because it does not use energy and cannot reproduce by itself.

The correct answer will be option-D.

Explanation:

The virus is an infectious particle which causes several diseases in the animals.  

A virus particle is made up of a genetic material enclosed in a protein layer but no other living characteristics therefore is considered non-living. It lacks all the machinery for replication, therefore, it uses the machinery of the host and replicates or reproduce inside the host cell.

This feature helps us to distinguish that particle is a virus thus, option-D is the correct answer.

i believe your answer would be c.. : )

the oldest known insects are believed to live around 400 millions ago as suggested by the fossil records.   some plants having woody stems also evolved during this time.

after the evolution of insects the first four legged species or the tetrapods evolved in shallow freshwater habitats from the intermediate species approximately 397 million years ago. the tetrapods went on conquering the land giving rise to amphibians, reptiles, mammals and birds.

the major split in tetrapods first occurred 340 million years ago branching off from amphibians.

363 million years ago when the carboniferous period began the insects started roaming on land and taking flights, following which the four limbed tetrapods adapted in the terrestrial habitat.