Which of the following take(s) place during either interphase or mitosis in animal cells? i. re-formation of nuclear membranes ii. pairing of homologous chromosomes iii. dna replication
a. i only
b. i and ii only
c. ii and iii only
d. i and iii only

Most animal cell membranes have proteins that pump. ions out of the cell and potassium ions into this

What are the two causes of density in deep current waters? a. salinity (how much salt) of the water and high temperaturesb. salinity (how much salt) of the water and low temperatures c. oxygen content of the water and high temperatures. d. oxygen content of the water and low temperatures

Which animal is a producer in this ecosystem