William is testing what type of light best bean plants grow. he plants four beans in four separate pots. he places each pot in a different room and subjects them to different types of light, and he waters each plant the same amount. he uses sunlight, ultraviolet, fluorescent, and black light. william then measures the height and growth rate of each plant. which light source is part of the control group for william’s experiment? a) sunlight b) ultraviolet c) fluorescent d) black light

Which describes how weathering and erosion are different? weathering is caused by water. erosion is caused by wind and ice. erosion transports sediments. weathering is a natural process.

You have been asked to lead a demonstration for the undergraduate microbiology lab course about the uses of negative staining when studying bacteria. a "negative" stain does not stain the bacterial cell itself but stains the space between cells. under magnification, the acidic (negativelycharged) nature of the stain will be repelled by the negatively charged bacterial cell wall and willleave the cell colorless in a stained background. negative stains are used primarily to reveal the presence of negatively charged bacterial capsules; therefore, they are also called capsule stains. encapsulated cells appear to have a halo surrounding them. the negative stain procedure does not require heat fixation, which limits any chances of alteration in bacterial cell shape and size. the bacterial suspension is added to a drop of stain, such as nigrosin or eosin, and drawn across the glass slide using a coverslip.nigrosin staining-not safranin staining-of klebsiella pneumoniae will allow for the visualization of the cell shape and the determination of the presence of a capsule.true/false

This is the diveristy of ecosystems natural communites and habits it is the variety of ways that species interact with each other and their environment