If the balance of nature is left untouched, landscapes can change dramatically over time. A previous ecosystem is supers..
Mutations can also influence the phenotype of an organism. This tutorial looks at the effects of chromosomal mutations, ..
Plants produce hormones to regulate their growth. Auxins, for instance, influence plant growth. Know the role of auxin i..
Ferns and their relatives are vascular plants, meaning they have xylem and phloem tissues. Because of the presence of va..
The Earth's ecosphere was rapidly changing and throwing up a wide range of ecological niches that new adaptive organisms..