Science 7 Practice

These are single-celled microorganisms with prokaryotic cells, which are single cells that do not have organelles or a true nucleus and are less complex than eukaryotic cells.

These microorganisms are typically found inhabiting and thriving in extreme environmental conditions.

These are usually multicellular eukaryotic organisms that are heterotrophs (cannot make their own food) and have important roles in nutrient cycling in an ecosystem.

Organisms known as _______ include a wide range of organisms, most of which are free-living single-celled eukaryotes.

It is a term used to describe a large, diverse group of eukaryotic, photosynthetic organisms.

It is an infectious agent of small size and simple composition that can multiply only in living cells of animals, plants, or bacteria.

It is a group of eukaryotic organisms consisting of the flatworms and roundworms, which are collectively referred to as the helminthes.

It requires two parents. Each parent contributes a gamete - a sex cell that has half of the normal DNA of a regular body cell.

It requires only one parent to reproduce.

It is a single parent cell that doubles its DNA and then divides into two cells. It usually occurs in bacteria.