A biological process is represented in the diagram below. Which of the following concepts is best illustrated by the diagram?
a. Crossing-over creates new genetic diversity in gametes
b. Mitosis increases the number of chromosomes in Zygote cells
c. In sexual reproduction, the offspring produced are genetically identical to the parent
d. In sexual reproduction, the offspring receive the same number of chromosomes from each parent

Embryonic stem cells are cells derived from an embryo. these cells can be used to create new tissues for patients suffering from certain illnesses and disorders. which statement best summarizes why the use of embryonic stem cells could be seen as unethical?

The sketch shows a rynchosaur, an extinct animal that is known only from fossils. there has been much debate about the classification of these creatures. some scientists suggest that they belong with primitive amphibians, and some think they are related to snakes and lizards.the data equally support both cases. which statement best explains how to draw a cladogram that includes the rynchosaur? draw the cladogram for amphibians. draw the cladogram for reptiles. draw two cladograms, both showing the traits, and leave it as a hypothesis. draw two cladograms, both showing the traits, and have scientists vote

Which of these parts of the membrane large moecules pass through it ?