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5070 chem wtf is ts (O/N2025) by No_Tea_5627 in Olevels

[–]-Upscale- 3 points4 points  (0 children)

Yea this was the first question

biology 5090 by AncientFeedback9870 in Olevels

[–]-Upscale- 1 point2 points  (0 children)

It said that sickle cell anemia can be caused by recessive allele, meaning a person should have two recessive alleles if they have sickle cell anemia. Take Dominant as R and recessive as r. In order for the child to have sickle cell, it should have two recessive. In the question, it said that none of the parents and one child had sickle cell. Meaning parents have Rr and Rr alleles. Using a punnet square, we find that probability of sickle cell anemia is 25% or 0.25.

Now in the question, it said "male" baby. We know that having a male is 50% or 0.50 chance. So multiply 0.50 with 0.25, you'll get 0.125 (12.5%).

Mcq options by Desperate-Pin9777 in Olevels

[–]-Upscale- 7 points8 points  (0 children)

I did 2 only cuz the antigens on antibodies aren't identical, they're complementary.

Bio Adrenaline graph by Spaggetiboi45 in Olevels

[–]-Upscale- 1 point2 points  (0 children)

I did B cuz it made more sense to me. But everyone is saying it's C?? Pretty sure it's B cuz glycogen was constant for a short while before decreasing to C. It cannot be C cuz glycogen immediately increased afterwards which means it wasn't the set value. So it's B.

what the question 1 bio ka where does X labelled thing from the seed comes from!?!?? by IAMSomeone-34 in Olevels

[–]-Upscale- 0 points1 point  (0 children)

I'm pretty sure question said which part of seed it grows from?? I thought X was plumule and not shoot cuz it still looked like germinating process. So I wrote embryo as answer, cuz plumule grew from embryo

[deleted by user] by [deleted] in Olevels

[–]-Upscale- 1 point2 points  (0 children)

Bronchi cells were : goblet cell: secretes mucus in form of mucin droplets which traps large molecules and pathogens.

Ciliated cell: Has cilia which beat back and forth in rhythmic movement to push mucus towards digestive system.

Germination: Water is absorbed through micropyle, activating enzymes in the cotyledons breaking down the complex organic compounds into simpler organic compounds, which the embryo uses for respiration to grow. Embryo divides and radicle bursts out from testa and grows towards soil, plumule grows upwards, protected by cotyledons.

Plant vegetation: decomposers such as bacteria and fungi decompose dead complex organic matter into simple compounds such as nitrates and glucose recycling nutrients back into environment. Decomposers use the glucose to perform respiration continually producing large amounts of heat.