Top answers

Describe how water moves from the roots to the leaves in plants

water moves via the transportation stream, pulling it up through the xylem in the stem of the plant
CX
Answered by Caitlin X. • Biology tutor
3172 Views

What are the four bases found in DNA and how do they bond.

There are four DNA bases, Adenine (A), Cytosine (C), Guanine (G) and Thymine (T). On each strand of DNA, the DNA bases are connected by phosphodiester bonds, to form a long chain. These long DNA strands are ...
TJ
Answered by Toby J. • Biology tutor
19164 Views

Describe how the sperm cell is adapted to its function.

The sperm cell is adapted to its function in multiple ways:It has a tail which enables it to swim towards the egg.The middle section of the cell is packed with mitochondria. This allows it to release the ene...
HH
Answered by Huw H. • Biology tutor
35880 Views

How do I get full marks for this question "Describe how a vaccination leads to antibody production" ?

Mark 1: What is a vaccine? A vaccine contains antigens from an inactive form of a specific pathogen. Mark 2: Which cells are first to respond to the antigen? Antigen presenting cells such as macrophages pres...
CT
Answered by Chloe T. • Biology tutor
3140 Views

A patient is infected by a pathogen. Explain the process of the imitation of the immune response (5 marks) The paitent was prescribed antibiotics yet their symptoms did not improve. What can you infer from this? (1 mark)?

5 of the following... Pathogen has antigens on its surface that are recognised as foreign by the immune system T helper cells stimulate cytotoxic T cells, B cells and phagocytes (or lysosomes) B cells produc...
HF
Answered by Harriett F. • Biology tutor
2751 Views