Propose an explanation why there might be a sudden appearance of a species in the fossil record.   1.the fossil record is incomplete and the previous members of the lineage did not leave a fossil. 2.the fossil record is complete. 3.that species lived in an area that had an abundance of water and mud. 4.fossils could not be found in that layer of rock 

Students commonly confuse saccharomyces cerevisiae and staphylococcus aureus when viewed on a microscope slide how could you microscopically differentiate

In a lab, scientists grew several generations of offspring of a plant using the method shown. what conclusion can you make about the offspring? a. they formed from meiosis and mitosis. b. they have half the number of chromosomes as their parent. c. they have low genetic variability among them. d. they will be able to reproduce only after they grow flowers.

28. how many linkage groups will be formed by homogametic organism with 28 chromosomes?