A model of a concave lens is shown in the diagram. Which of the following describes a possible application of this type of lens?

A Concave lenses can be used in microscopes to make small objects
appear larger

B
Concave lenses can be used in car headlights to spread the projected
light outwards

C
Concave lenses can be used in mirrors to make objects appear closer
than they truly are
D
Concave lenses can be used in laser pointers to converge the
projected light to a single point.

List two modern organisms that have pentameral symmetry

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.

All but one describes an effect of aging on the digestive system. a) decreased acid secretion b) decreased elasticity of stomach c) capacity to resist damage decreases d) food remains in stomach for less time