Select all of the following statements that are true about lymph nodes.
1they are glands
2they are nerves
3they hold and distribute lymphocytes
4they make lymphocytes
5they filter the lymphatic system from harmful bacteria

Which of the following graphs have the same wavelengths

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above

Astudent poured a solution of bromothymol blue indicator into three test tubes. then he placed an aquatic plant in two of the test tubes, as shown below. he placed a stopper on each test tube and placed them all in the dark for 24 hours. bromothymol blue turns from blue to yellow in the presence of co2