The Punnett square shows the possible genotype combinations of two parents who are hom0zygous for a trait. What is the probability of the parents having a child that is heterozygous for this trait?

0%
25%
75%
100%

Mario performed an experiment to determine if photosynthesis was affected by the amount of light that a plant received. what could he have done to increase the validity of his data? reduce the number of plants. remove the 1 hour group. add a 0 hours control. measure the oxygen in liters

Most of the fossils found in virginia are in the coastal plain, valley, ridge, and appalachian plateau regions, best suggesting that these geographic provinces a) were once covered by seawater. b) are the oldest parts of virginia. c) have a great deal of karst topography. d) have large amounts of sedimentary rock.

Explain the significance of the increased cell specialization of the volvocine line