1. Where do homologous chromosomes exchange genetic material through crossing over?
A. Chiasma
B. Chlorophyll
C. Centromeres
D. Centrosomes

Which of the following will not cause mass extinction? a. drastic change is weather b. geological change c. both a and b d. none of the above

Complete the possible outcomes for each generation in the pedigree chartaa aa aa

According to piaget, children have acquired the cognitive skill of conservation when they're able to a. understand that six ounces of liquid in a jar and six ounces in an elongated tube are equal. b. understand the viewpoint of other people. c. relate objects around them to their own needs. d. realize that the term heavy describes an object one way and the term big describes it another way. it is not b nor c. did this 2 x wrong..