An electron microscope is usually used for microorganisms that are

too small to be seen with the unaided eye
too small to be seen with an optical microscope
not possible to observe with any instrument

Examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. polyploidy is creating new species. the two populations are not interbreeding freely. hybrid offspring of the two populations begin to appear. one species will increase into a population size twice as large as the other species.

What type of plant is good for a bioassay and where can i buy it? i only have a month.

Why is the statement not a hypothesis? sunflowers require soil and plenty of sunlight and water to grow and thrive.