Answer:
Because it is a mode for reproduction and growth.
Explanation:
Cell division is important for both single-celled as well as multi-cellular organisms.
In single-celled organisms, the cell division is the process which helps them to reproduce and form new organisms.
In multi-cellular organism, the cell division becomes more important because both, the division and growth in cells of multi-cellular organism occurs by means of cell division. When cells divide, the number of cells increases and it is seen as a overall growth in the organism. Damaged tissue repair is also accomplished by the cell division itself.
Sunlight is for the first question, Salinity for the second, and Density for the last one. Now you just have to explain why they relate to each other. Example: Some sea stars live on the bottom of the ocean where there is no sunlight and thus food is not the same as it would be in shallower waters. Due to the lack of sunlight, there are scarce amounts of nutrition that falls to the ocean floor for sea stars to eat. Now you just have to relate the other two questions with their properties.
D) species
To figure this out think of the order in which you classify organisms in. Domain, kingdom, phylum, class, order, family, genus, species (in the order from most diverse to least)
Answer:
12 billion years and beyond
Explanation: