What is a picture of homologous pairs of chromosomes and sex chromosomes? nuclear DNA

stereotype

karyotype

allele

What is a scientific theory? a. a scientist's guess about how something works b. the results of an experiment obtained using the scientific method c. a proven fact that will never change d. an idea that is backed by data from many sources

How are elements arranged in a periodic table

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.