10th grade earth science

drag each item to indicate whether the property must be observed using a tool or doesn’t require a tool to be observed?

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

Amylase is an enzyme found in the human digestive system. why do you think it was important to keep the enzyme temperature above 37 degrees celsius (98.6 degrees f)? describe what might happen if the temperature decreased by 10 degrees celsius.

The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions