The institute of biology's studies in biology.. No. 62,. Marin zooplankton / The institute of biology's studies in biology.. No. 63,. Homeostasis / The institute of biology's studies in biology.. No. 65,. Plant tissue culture / The institute of biology's studies in biology.. No. 37,. Photosynthesis / The institute of biology's studies in biology.. No. 18,. Population dynamics / The institute of biology's studies in biology.. No. 60,. The secretion of milk / The institute of biology's studies in biology.. No. 48,. Plants and mineral salts / The instutute of biology's studies in biology.. 93,. Haemoglobin / The instutute of biology's studies in biology.. 96,. Plant growth / The instutute of biology's studies in biology.. 98,. Plant physiological ecology /