In the fruit fly drosophila, there is a dominant gene for normal wing shape and its recessive allele for dumpy wings. at another gene locus on the same chromosome, there is a dominant gene for tan body color and its recessive allele for ebony body color. a male that is homozygous for both dominant alleles is crossed with a female that is homozygous for both recessive alleles. what percentage of the f1 flies are expected to be heterozygous at both gene loci? ( enter the number only without the percent sign. for example, enter 100% as 100 and enter 12.5% as 12.5 )

Which of the organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi

Two students are working together on an experiment that measures the effect of different liquid fertilizers on the thickness of plants’ stems. which is most likely to result in the greatest amount of error in their scientific experiment? a.one student measures the plant stem widths by using calipers. the other student measures the widths of the same plant stems again by using a different pair of calipers. b.one student measures the plant stem widths by using calipers. the other student types the measurements as they are taken into a computer spreadsheet. c.one student weighs liquids for the experiment by using a calibrated scale. the other student weighs liquids for the experiment by using a different calibrated scale.

Which is an example of a vestigial structure? a: paw of a lionb: wing of a birdc: appendix of a humand: tail of a cat(i think it's a but i'm not sure)