A2 Biology - Speciation (OCR A Chapter 20.6)

[@elliepalmer1581]

Do you think you’d be able to do walk through videos on exam questions , for ocr papers? You explain things so clearly x

[@sasharennocks3252]

hi bio rach! thank you so much for your videos i am doing ocr B a level bio and they have been very helpful! :)

[@shivparekh1021]

Hi, is it possible to do a video on artificial selection and inbreeding as it's also part of 20.6?

[@patriceolivier4800]

Can you do a video on biodiversity please thank you. Great video also.

[@thanismurugathas2929]

She has made an overview of this chapter : kzbin.info/www/bejne/jJuWnpyZm7d4mNU and a video on maintaining biodiversity : kzbin.info/www/bejne/h5WWdZmOn89joqc. these are really useful to go through if are looking for a great way to re-revise what you learnt quickly. Most of the biodiversity chapter is just memorization so just go through your textbook as search on KZbin how to do all the equations such as Simpsons diversity index

[@planetofi5hii]

have you done the whole spec? and if you haven't, when do you think you'll be done? (ive got my mocks in february and your videos are the best in terms of detail and explanation so i rlly wanna do well)

[@thanismurugathas2929]

I believe she is going through the most difficult and problematic topics first. You should watch all her videos up till now because they all explain an easier way to understand the topic she is talking about

[@BioRach]

Yes absolutely, that's the idea since I won't be finishing the spec anytime soon (being in full time teaching!) But please do watch the videos so far covering what I've seen as the more complicated topics atm. All the best for your mocks! :) Thank you both for the support :)

[@viclate428]

I get it now :)

[@miax724]

Hi could you do chapter 14 please?

[@patriceolivier4800]

Hi miss goodnight, this video was indeed helpful again. Not sure if you have a social media platform but i wanted assistance with this plan and design lab. I would send the observation for it. Wanted to know how to approach it and a possible procedure for the lab. A young farmer, wanting to increase the yield of his tomato plants using a greenhouse, increased the carbon dioxide concentration available to plants to 0.05% and maintained the temperature in the greenhouse at 28°C. Plan and design an experiment to assist the farmer. Thanks miss any help would be greatly appreciated.

[@mrcrggyt2307]

bro been aired 🤣