Based on the data in Figure 1, which of the following is most likely the primary cause of the pattern of frequency of trisomy 21 births in the selected maternal age-groups? A) At older maternal ages, there is an increase in the number of errors during mitosis, which leads to an increase in nondisjunction during egg production.
B The incidence of nondisjunction errors in meiosis during sperm production is positively correlated with increasing maternal age.
At older maternal ages, the incidence of errors in meiosis during egg production increases, which leads to an increase in nondisjunction.
DErrors in meiosis leading to nondisjunction are more likely to occur during meiosis I than during meiosis II

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

How do chloroplasts set plants apart from other living things

Organize the word parts according to where they appear in a medical term.