Sickle cell disease is caused by a:
a) change in the number of chromosomes in a cell
b) change in the size of a chromosome
c) change in two proteins
d) change in one allele

i know it's hereditary from your parents when both carry the gene, and it's a mutation in your hemoglobin, but none of these answers make sense to me! respond asap, !

4the indian leaf butterfly has traits that allow it to resemble a leaf. the bright colors of the monarch butterfly indicate that the butterfly tastes bad and can be poisonous. how does the appearance of these butterflies them to survive? f the indian leaf butterfly is able to avoid predators while the monarch butterfly warns predators away. g. the indian leaf butterfly frightens predators away while the monarch butterfly poisons predators before they can eat it. h both butterflies rely on camouflage to avoid predation. j both butterflies cooperate with one another to avoid predation.

Describe at least 2 abiotic and two biotic factors found in the desert biome how do these abiotic factors interact with the biotic factors

Identify the missing parts of the carbon cycle