How many homozygous alleles are there in these homologous chromosomes? a) 3 b) 4 c) 5 d) 6

Will someone me with this.. specialized cells which perform a particular function form: tissues organs or organism

The picture represents a structure of the respiratory system. which is the function of this structure? to bring air into the body to exchange oxygen with carbon dioxide to carry air to the lungs to release oxygen from the body

Climate like that in the sahara desert have the fastest rates of weathering