Top answers

How does the process of blood clotting occur?

The function of a blood clot is to prevent blood loss from damaged blood vessels. In order for a blood clot to form, activated platelets and the damaged tissue release clotting factors which are proteins in ...
AC
Answered by Anna C. • Biology tutor
20636 Views

Discuss the relative importance of genetic and cultural evolution in the recent evolution of humans.

· Changes in genotype (genetic evolution via natural selection) have lead to cultural evolution in humans by promoting intelligent behaviour · Larger brain sizes have promoted increased learning capacity / g...
ZK
5020 Views

Discuss the incompleteness of the fossil record and the resulting uncertainties about human evolution.

Incompleteness of the Fossil Record ▪ Fossilisation is an exceptionally rare occurrence that requires an unusual combination of special conditions ▪ Most living things tend to decompose rapidly (or be scaven...
ZK
10171 Views

Describe one example of transient polymorphism.

A polymorphism is the occurrence of two or more clearly different phenotypes within the same population of a species - it reflects the effects of more than one allele in the gene pool Transient Polymorphism ...
ZK
19503 Views

Explain how sound is perceived by the ear, including the roles of the eardrum, bones of the middle ear, oval and round windows, and the hair cells of the cochlea.

· Sound travels as pressure waves in the air which push the membrane of the eardrum, causing it to vibrate. The degree of vibration will vary according to the frequency and amplitude of the sound waves. · Th...
ZK
12852 Views