IB Biology Topics 9.3 & 9.4 (HL): Growth & Reproduction in Plants

This video begins by introducing how a plant achieves indeterminate growth in its apical meristem, followed by its regulation by auxins and cytokinins. Next, it delves into the processes of phototropism and gravitropism to guide plant growth. This is followed by the regulation of flowering by phytochrome, covering both short-day and long-day flowering plants. Afterwards, the resulting flower structure is reviewed and the subsequent processes of pollination, fertilisation, seed dispersal, and germination, are covered in detail. The video ends on the concept of micropropagation and its advantages.

00:00 Introduction
00:31 Plant growth
01:24 Plant growth regulation
02:13 Phototropism
03:26 Gravitropism
04:07 Flowering
05:08 Phytochrome
07:15 Preview finished!

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