CSEC 2022 Biology Paper 1 with explanations

[@nia-hn5re]

For question #58 at 54:44 the question "A species consist of members that..." you chose "C" which is interbreed under natural conditions" but inyour 2021 video with the same question also as #58, you chose "D" which was "interbreed to produce fertile offspring" so I'm a bit unsure as to what the correct answer is? can you confirm.

[@science_exam]

58 is actually C, D was for the previous paper. This paper reads infertile offspring. Look out for the changes in words sometimes.

[@okaybutlikelisten]

@@science_exam @nia-hn5re But question number 58 option D said, interbreed to produce infertile offspring which does not answer the question correctly. So the best answer in this case would've been C

[@science_exam]

@@okaybutlikelisten 100% correct. At times cxc may change a word to make the answer different. This paper the option is C and the other paper it is C. Thank you for your contribution to great learning.

[@nia-hn5re]

@@okaybutlikelisten ohh I didn’t realize thank you!

[@latoyarigaby7950]

Today is the day. I want to thank you for sharing your knowledge with us. Thanks so much

[@science_exam]

You are welcome and good luck.

[@science_exam]

NOTE: Question # 27 answer should read Vitamin K and Ca ion. I actually said Potassium (K), instead of saying vitamin K.

[@richtriniawilliams3683]

THE ANSWER IS D STILL

[@tianshizhou-pd6xc]

I have CXC coming up in a few days n this was very very helpful😊

[@science_exam]

Thank you and good luck.

[@storytime6110]

thank you sirrrr. please make more content for physics it is a very challenging subject the problem with my teachers are that they do not explain well and expect students to magically know how they ended up at this answer i just need a youtube channel that explains the physics concept well.

[@science_exam]

I will, 2023 paper 2 is coming real soon.

[@randomv3663]

Thank you for the explanations.

[@science_exam]

You are welcome.

[@davidalaneme9213]

Thank u bro it help me alot i am an Nigerian and writing cxc biology is easy with you thanks

[@science_exam]

You are welcome, good luck.

[@mellesia7646]

God bless you sir.

[@science_exam]

Thank you.

[@ericafrancis9515]

Thank you so very much sir

[@science_exam]

You are welcome.

[@letashabarclay7272]

this was helpful thank you

[@science_exam]

Awesome!

[@alvesiaweatherhead6369]

Goodnight Mr. Knight. I am a fellow teacher and I would love to have a copy of that paper for me and my students. Is there anyway you can send it to me?

[@science_exam]

Good night, you could send me your email address. I will then remove your response after receiving it.

[@TwixMix]

Sir could you explain number 37 little more plz 36:10 .. as on a answer sheet for bio past papers , I’m seeing that the answer is “B” while you have “C”

[@science_exam]

Ensure you go back and see the labels added in blue. For reflex action the transmission of impulse starts from the receptors ➡️ sensory neuron ➡️ relay neuron ➡️ motor neuron ➡️ effector. Hence the answer is C. In other words, the motor neuron sends impulses to the effector. Option B is identifying the structure as a reply neuron. So that answer sheet you have mistakenly read the question for identify the relay neuron. The question asked, what relays the impulse to the effort . NOT WHAT IS THE RELAY.

[@jamonecoley9930]

Sir for question 55, of both parents were albino then wouldn't their children also be albino?

[@science_exam]

Yes, if both were albino then yes. However, for this question, both are normal and for this reason they are heterozygous or carriers.

[@meloniekerr1933]

Thank you so much sir

[@science_exam]

You are welcome.

[@shabanaismael9621]

if you messed up ur paper 2 and got the max of 10 out of 60 wrong in your paper 1 with a good SBA is it stilll posasible of a grade 1?

[@science_exam]

If you mess up on paper 2 and fall below the 80 - 85% mark on paper 2, then getting a grade 1 won't be that promising.

[@mitchealkhan620]

Isn't number 19 supposed to be "D"?

[@science_exam]

Actually C

[@jovanobates3835]

Sir post the link please. Love the content BTW.

[@science_exam]

Hi, Thank you for watching and your comment. What link are you requesting?

[@jovanobates3835]

@@science_exam the link for this paper

[@jahkeemgrant1866]

Sir , 58 I thought was D.

[@science_exam]

No, D has infertile offspring instead of fertile or viable offspring. You can double check.

[@jessicawilliamson2760]

58 is D sir

[@science_exam]

D has infertile offspring, that makes D incorrect. C is the best option.

[@omariojohnson-mh7kj]

no

[@science_exam]

?

[@xaihendrickson1774]

Sorry, that's my child. He has an extra chromosome.. If you know what I mean.

[@science_exam]

@@xaihendrickson1774 That is ok. I hope all is well.

[@xaihendrickson1774]

@@science_exam ill put him up for adoption

[@science_exam]

@@xaihendrickson1774 lol