The changes observed in aging are in part caused by Shortening of the telomeres
DNA replication
Mitosis
Meiosis

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

Which strategy is an example of how companies may upgrade themselves to meet changing customer preferences? a. doing door-to-door sellingb. using billboards to advertise the productsc. making online shopping services availabled. giving discounts on products

Which organ controls breathing? lungs alveoli heart diaphragm