Which of these cells of the dermal tissue of plants prevent water loss and control gas exchange

The picture below shows two galaxies. spiral galaxy and elliptical galaxy which of these statements best describes a similarity between the two galaxies? (2 points) both have elongated centers. both have centers shaped like bars. both change their shape from time to time. both are held together by gravitational forces.

Why does sexual reproduction increase the genetic variation in a species? a. sexual reproduction doubles the chromosome number. b. sexual reproduction produces organisms with no dna. c. the gametes in sexual reproduction are exact clones of the parents. d. a fertilized egg has a mixture of alleles from the two parents.

Which type of unconformity occurs when sedimentary rock overlies igneous rock? question 8 options: disconformity nonconformity angular unconformity conformity