The vascular cambium gives rise to (A) all xylem. (B) all phloem. (C) primary xylem and phloem. (D) secondary xylem and phloem

Video transcript

Welcome back. Let's look at our next question. This says secondary growth is due to and we want to recall from our content videos that secondary growth is the thickening of the plant stems as opposed to, so it's not the lengthening. The lengthening of the stem is primary growth. So we're talking about cell division that leads to stems and roots becoming thicker on the plant. So let's evaluate our choices. Here we have choice A. A. Pickle mary stem cell division in the optical mary stem is part of primary growth because it causes the increase in plant length. So choice A. Is not correct choice B. Is the inter calorie mary stem. This is a part of the typical mary stem and therefore helps with primary growth. That lengthening also not correct choice C. Says the primaries asylum and flow. Um Well these are produced as part of primary growth so they don't cause and they don't cause secondary growth. So finally we're down to choice D the vascular camby in and the cork campion. And these are together part of the lateral mary stem, what's called the lateral mary stem. And yes, cell division in these parts causes thickening of the plant roots and stems. So this is our correct answer. That is secondary growth due to cell division in the vascular can be um And cork can be um See you in the next video