Top answers

Biology
All levels

Describe what is meant by active transport and state one way in which it is different to simple diffusion

Active transport is the movement of substances from an area of lower concentration to an area of higher concentration. Movement is going against the concentration gradient. This is ATP requiring.Active tr...

JE
Answered by Joshua E. Biology tutor
2351 Views

What is necessary for photosynthesis to occur?

Essentially, photosynthesis is the process by which plants convert light energy to produce sugar. It needs water, light and carbon dioxide to occur and produces oxygen and sugar/carbohydrates. Photosynthe...

CC
Answered by Claudia C. Biology tutor
1511 Views

What is the function of the nucleus in an animal cell?

The nucleus contains all of the genetic information of the cell. This genetic information is the DNA. DNA is deoxyribonucleic acid, and through this the cell is able to complete its functions through tran...

IV
Answered by Isabelle V. Biology tutor
3013 Views

In humans, males are XY and females are XX. Why are sex-linked characteristics more common in males than females?

The recessive allele is always expressed in males, whereas females need two recessive alleles (homozygous recessive). Females could have dominant and recessive alleles, which would mean they are carriers,...

CC
Answered by Caitlin C. Biology tutor
2784 Views

Explain how the mammalian pancreas controls blood sugar concentration after a meal.

The pancreas consists mainly of exocrine tissue (<98%) which produces pancreatic enzymes required for digestion. The remaining endocrine tissue is organised into Islets of Langerhans which contain 5 di...

CH
Answered by Cara H. Biology tutor
2343 Views

We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning