The light we see from the Sun comes from which layer? -troposphere
-chromosphere
-photosphere
-corona

Where do homologous chromosomes exchange genetic material through crossing over?               a.  chlorophyll    b.  centrosomes    c.  centromeres    d.  chiasma

2points what is the term for a female reproductive cell? a. egg b. chromatid c. allele d. fertilization

The idea that all living things are made up of cells is considered scientific law. this means the idea is an emerging scientific idea that has a logical explanation. has been tested with similar results at least twice. is supported by scientific consensus and a large amount of evidence. has been rejected only once by the scientific community