Edexcel A-level Biology B Paper 2 (9BI0 02) - 16th June 2023 [Exam Chat]

Scroll to see replies

Reply 120

Alaalazizi

Not necessarily m8, I might be wrong

Original post by avaleadbetter

Oh well 1 mark lost

Reply 121

StudyJourney

The question was about a primary spermatocyte going under division and primary spermatocytes form secondary spermatocytes through meiosis 1 so that would be the answer

Reply 122

rrwwtt0

Original post by Alaalazizi

Secondary spermatocytes are always haploid. So, it can't be meiosis 1.

swear it said primary spermatocytes tho?

Reply 123

Alaalazizi

Did it? I remember it saying secondary. But anyhow, if primary, P1(Option A), if secondary, P2(Option B). Does anyone else remember what it asked for?

Original post by rrwwtt0

swear it said primary spermatocytes tho?

Reply 124

FSan

Yh i specifically remember it saying primary cuz I drew the stages. Anyway I put p1

Reply 125

soochiii

Original post by medium23

I think you had to subtract the the original volume which had the radius of one … but im not sure

yeah it was (6-2)/2 for the radius and the length was 1cm³

Reply 126

soochiii

Original post by Alaalazizi

Secondary spermatocytes are always haploid. So, it can't be meiosis 1.

was the question asking what stage the 2° spermatocyte was formed in? if so, it's the first meiotic division (prophase 1.) P2 would form the spermatids.

Reply 127

sylkiebot

Original post by Alaalazizi

Did it? I remember it saying secondary. But anyhow, if primary, P1(Option A), if secondary, P2(Option B). Does anyone else remember what it asked for?

It said primary.

Reply 128

67824930

Can we safely assume there won’t be anything on cyclic and noncyclic photophosphorylation? I remember there being a few Qs on it in paper 1 and I really cba to revise it it takes so much time

Reply 129

ifif4

Original post by 67824930

Can we safely assume there won’t be anything on cyclic and noncyclic photophosphorylation? I remember there being a few Qs on it in paper 1 and I really cba to revise it it takes so much time

Yeah I don't think there would be a lot on photosynthesis. There were a few questions on it on paper 1. But there may be some respiration

Reply 130

medic talks

Please could someone help with this question. I can’t seem to get the right answer

41CBFE5D-8B18-4A4E-BFAF-58082058B128.jpg186.5KB

Reply 131

ifif4

Original post by medic talks

Please could someone help with this question. I can’t seem to get the right answer

195-190= 5^2=25
185-190= -5^2 = 25

25+25= 50
You do the square root of 50 divided by (3-1) = 5

Hope this helps

(edited 10 months ago)

Reply 132

Idkbroo

I rlly cba for this paper ffs 😞😞😞

Reply 133

epoch.ly

Original post by moomoocow21

so what did you say was the reason why they were less efficient?

sorry didnt see this but my answer was wrong bc i got endotherms and ectotherms switched up. i said they lose energy trying to maintain their own body heat. idk that question confounded me a bit . if i had to guess maybe bc they have high sa:v as theyre smaller, lose heat etc, or they might be more active and lose more energy via metabolic processes idk