Sociable weavers are a species of bird found in Africa. All males of a colony work together to build a large nest that can house several hundred birds. This is an example of

The characteristics of the Sociable weavers of living in colonies and cooperating for the construction of nests is an example of gregariousness, a type of intraspecific relationship.

Explanation:

Intraspecific relationships are those interactions that occur between individuals of the same species, characterized by the influence that each of them has with their similarities.

Gregariousness -as observed in Sociable weavers- is an intraspecific relationship that leads individuals to live in communities or colonies, contributing to the care, protection and feeding of their members.

Other gregarious species are bees and ants.

Learn more:

Intraspecific relationship link

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!

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