The maternal effect Drosophila mutation bicoid (bcd -
) is recessive. A
female that is bcd
-
/bcd
+
is mated to a bcd
-
/bcd
- male. What is the outcome?
A) 50% of the eggs will hatch, and these will produce fertile adults
B) no eggs will hatch
C) all eggs hatch, but 50% of the resulting daughters produce eggs
that fail to hatch
D) it is impossible to get a bcd
-
/bcd
- male, so this mating can not
occur
E) 50% of eggs will hatch, but half the female offspring will be infertile

Which of the following is not a classification of marine organisms? a. benthos c. neritic b. nekton d. plankton select the best answer from the choices provided a b c d i know the answer is not option b

Liquid water turns into water vapor at which step in the water cycle

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