What is occurring in the diagram below? a. alleles are independently assorting
b. segments of dna are crossing over
c. sister chromatids are separating
d. genes are replicating

Which would prevent a plant from growing? oa. lack of sunlightob. no supply of lithiumoc. too much waterd. too many monosaccharides

How does photosynthesis show the conservation of mass and energy?

Which short-term environmental changes would a very small asteroid or comet impact on earth most likely cause? check all that apply. flooding extinction craters on surface changes in weather patterns death of organisms and populations