A biology graduate student presented a seminar where he described an experiment in which two closely related Drosophila species have been crossed. Both parental species and the F1 generation have been studied using RNA-seq. For reads with single nucleotide polymorphisms (SNPs) between the two species, he could determine from which allele they had been transcribed. He was interested in finding genes with differential expression levels between species caused by trans-acting mutations. Which genes should he select

How do the evolutionary chart and the video support the claim that all living things are made up of cells?

Which of these is true of the cytoplasm of an unfertilized egg? a. it is an unevenly distributed mixture of mrna, proteins, organelles, and other substances. b. it does not contain substances that are important in directing development. c. these substances are supplied by the sperm. d. it does not contain substances that are important in directing development. e. development is directed solely by the surrounding cells. f. it is a homogeneous mixture of mrna, proteins, organelles, and other substances. g. it does not contain substances that are important in directing development. h. these substances are produced by the dna of the fertilized zygote.

Which statement best explains why cells were observed in more detail using a compound microscope than a simple microscope? a compound microscope has greater magnification ability than a simple microscope. the compound microscope was invented before the simple microscope. a compound microscope is much easier to manufacture than a simple microscope. compound microscopes were more common than simple microscopes.