These leaves grow horizontally, so that the majority of photosynthetic cells are facing upwards and receiving light in the day for photosynthesis. The majority of stomata are found on the lower half so that transpiration does not increase during the day. Dorsiventral leaves can either be 1) simple, consisting of one leave or 2) compound, consisting of many leaves stemming from the same petiole.
DNA is a double helix structure comprised of nucleotides. A nucleotide, in turn, is made up of phosphate molecule, deoxy..
A running water environment offers numerous microhabitats for many types of animals. Similar to plants, animals in lotic..
Hormones are essential in the regulation of the activity of the various biological systems of the human body. The ineffi..
This tutorial describes the role of gibberellin family in plants. Find out the effects of gibberellin on plant growth an..
Meet some of New Zealand's unique fauna, including endemic insects, frogs, reptiles, birds, and mammals, and investigate..
Neurons generate electric signals that they pass along to the other neurons or target tissues. In this tutorial, you wil..