Chargaff wrote: "DNA is in its composition characteristic of the species from which it is derived. This can ... be demonstrated by determining the ratios in which the individual purines and pyrimidines occur
There appear to exist two main groups of DNA, namely the 'A-T type,' in which adenine and thymine
predominate, and the 'G-C type,' in which guanine and cytosine are the major constituents."
1. What does this mean? Put Chargaff's ideas above into your own words.

spiders belong to a group of arachnids.

arachnids have the following traits :

they have two body parts.

they have eight legs unlike insects which have 6 legs.

they have no wings.

these traits distinguish them from insects.

the information that antonio is doubting us the statement that spiders differences are as a result of being first to evolve.

this is because the evolution of one species is independent of the other species.

the electromagnetic energy from the sun arrives in the form of visible and invisible light.

i dont know it at allnow im just getting points at this pint

its temperature is increasing. this causes molecular vibrations to increase.