If both parents have normal red blood cells then how can the child have sickle cell anemia PLS HELP ME

It's due to hereditary

Explanation:

Hereditary Is something that is passed on from family generations. It can pass on genes and disease's. From past family members in blood lines.

Example: My grandpa had cancer but my mom and dad did not but I still have his blood and when I'm 30 I get diagnosed with cancer and die 1 year later.

Hope this helps :)

relative dating involves things like higher layers are most recent than rocks lower in the sequence. this can be extended to the known sequence of fossils. rocks containing rabbit fossils are later than those containing dinosaur fossils.  

absolute dating methods mainly use radioactive elements that have known rates of decay and produce recognizable products. for example potassium 40 decays to produce argon. once a rock has solidified the argon is trapped. by measuring the argon and potassium0 you can get an accurate number for the age.  

some other methods are good for archaeological ages. dendrochronology involves recognizing the sequence of tree rings. the orientation of magnetized particles in baked clay can be used to date a fire.

hope this .. .

answer: after carbon dioxide enters the leaf through stomata it moves into the mesophyll cells where photosynthesis occurs and glucose is constructed. respiration occurs when glucose (sugar produced during photosynthesis) combines with oxygen to produce useable cellular energy.

explanation: