1. what function do photoreceptor cells perform?

1)they allow spiders to sense tiny vibrations.

2)they sense chemicals, so spiders can track prey.

3)they detect light, allowing spiders to see colors.

4)they spiders balance while walking on strands of
their web.

The correct answer is 3 They detect light,allowing the spiders to see colors.

Explanation:

Photoreceptors are also called transducin  presnt in the rod cells of retina and play an important role in vision.

     The phoreceptor is a G protein coupled receptor that contain GDP.When light strikes the eye the GDP is coverted to GTP resulting in the activation of the photo receptors.

 The activation of photo receptors result in the closure of Na+ ion channels leading to hyperpolarization caused by lowering the cellular label of cGMP by the activation of phosphodiesterase enzyme.

  This ultimately result in the formation of 5"GMP.

you know they are heterozygous for a trait because they have it as jj or jj.