Every cell in an organism has the same number of chromosomes except a) skin cells
b) neurons
c) white blood cells
d) reproductive cells

Which statement best describes a keystone species? o a. it has littlelmenetic variation. it has an extremely high population. 0 b. 0 c. it remains unaffected by all environmental changes. od. it has a strong influence on the ecosystem. 0 e. it's the first species to populate a new ecosystem.

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

Hemoglobin is a proton that carries oxygen around the body what is hemoglobin made from