Top answers

Biology
All levels

Describe how a student wouldn’t test for the presence of lipid molecules in a sample of food

The student would conduct an emulsification test. First of all, crush the sample to increase is surface area. Next add the sample to a test tube of ethanol, allowing  for he sample to disolve before addin...

TS
Answered by Tobias S. Biology tutor
2620 Views

Amy has cystic fibrosis which is caused by a recessive allele. Her partner is heterozygous for cystic fibrosis. What is the chance that her future child has cystic fibrosis?

Alleles are different forms of a gene which can become mutated to cause different characteristics or diseases. They can be dominant (usually denonimated by a captial letter H) or recessive (usually denomi...

RM
Answered by Rebecca M. Biology tutor
3858 Views

How may cells be specialised to their function?

Despite animal cells all having a nucleus (for genetic information storage and reproduction), a cytoplasm (for structure), mitochondria (for aerobic respiration), ribosomes (for protein synthesis) and a c...

AM
Answered by Alec M. Biology tutor
16187 Views

Describe how a new phenotype may arise in the population and increase in frequency using the theory of natural selection.

A mutation arises in an individual that confers a selective advantage.  The phenotype the mutation produces is selected for by natural selection and so the individual survives to reproductive age.  This m...

KA
Answered by Katy A. Biology tutor
2412 Views

Name and briefly describe the function of three organelles possessed by a plant cell. State an organelle that is present in a plant cell but not in an animal cell.

Plant cells possess a membrane bound nucleus that acts as the control centre of a cell.  They also possess a vacuole which controls water balance in the cell.  The chloroplasts are the site of photosynthe...

KA
Answered by Katy A. Biology tutor
3629 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