Use the following terms to fill in the paragraph: body plans, bilateral symmetry, radial symmetry, very similar, very different, always identical, in order, at random, large, no symmetry

hox genes regulate development of in animals with . In all organisms that have Hox genes, the genes are . During embryo development, hox genes are expressed . if a hox gene does not activate when it should during an embryo's development, it produces ___ changes in the adult animal.

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

What did hunter gathers do to alter the environment?

The idea of spontaneous generation was disproved by in a experiment involving jars of meat