In the 1950s, when watson and crick were working on their model of dna, which concepts were well accepted by the scientific community?

genes are made of dna.
chromosomes are made up of protein and nucleic acid.
genes are located on chromosomes.
chromosomes are found in the nucleus.
?

If a grape were placed in a hypertonic solution what would happen and why?

An uncomfortable feeling in the ears when descending in an airplane is caused by changes in air pressure on the: a. inner ear b. middle ear c. eardrum d. hammer/anvil

Which statement correctly compares metaphase i and metaphase ii? in metaphase ii twice as many chromosomes line up along the middle of the cell as in metaphase i. in metaphase i twice as many chromosomes line up along the middle of the cell as in metaphase ii. in metaphase ii twice as many chromosomes are pulled to opposite ends of the cell as in metaphase i. in metaphase i twice as many chromosomes are pulled to opposite ends of the cell as in metaphase ii.