Which of the following are characteristics of all animals?

many celled, ingest their own food, lay eggs

many celled, warm blooded, no cell wall

many celled, live on land and in water, warm blooded

many celled, ingest their food, no cell wall

Many celled, ingest their food, no cell wall

Explanation:

Many celled, ingest their own food, lay eggs

Well many animals DON'T lay eggs, so that option is out.

Many celled, warm blooded, no cell wall

Tons of animals aren't warm blooded, like aquatic animals. Therefore, this option is a no.

Many celled, live on land and in water, warm blooded

Most animals cannot survive on or in both land AND water. Plus, as I stated above, lots of animals are not warm blooded.

Many celled, ingest their food, no cell wall

Well, just by process of elimination, this is clearly the correct answer.

But in case you needed proof:

- Every animal can consume (or ingest) food, because without it, no animal would be able to survive.

- There is such a thing as a single celled organism. However, this is not an animal. All animals and plants are made up of multiple different cells that work together.

- Cell walls are a protective outer layer of a PLANT, not an animal.

Hope this helps! :)

a physical change is being made.

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!