In a volcano, magma fills cracks in the Earth's crust. Under the right conditions, this magma can be forced onto the surface of the Earth in a volcanic eruption. What could cause a volcano to erupt?
O A
A chemical reaction occurs within the volcano causing the magma to boil.
ОВ.
Hot water under Earth's surface rises causing the magma to move upward.
O c.
Earth's plates move causing the heat and pressure of the magma to increase.
OD
The temperature of Earth's inner core rises causing the magma to expand.

many phylogenetic trees have a single lineage at the base representing a common ancestor. a lineage that evolved early from the root and remains unbranched is called basal taxon. when two lineages stem from the same branch point, they are called sister taxa.

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explanation:

the supermassive black hole is in the middle of the galaxy.

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!