Savannahs have warm temperature year round. There are actually two very different seasons in a savannah; a very long dry season (winter) and a very wet season (summer). 

Gracilicutes (Latin: gracilis, slender, and cutis, skin, referring to the cell wall) is a controversial taxon in bacterial taxonomy. Firmicutes refers to the gram positive class of bacteria.

Clathrin is a protein that plays a major role in formation of coated vesicles.

Genophore is the chromosome equivalent in viruses, prokaryotes and certain organelles.

This is true during fertilization.

It is a large, diverse genus of plants with between 200 and 400 species belonging to the daisy family Asteraceae. Asteraceae family is not involved in nitrogen fixation.

Stabilising selection (not the same thing as negative selection, is a type of natural selection in which genetic diversity decreases and the population mean stabilises on a particular trait value.

Vitamin A is essential for vision, and when converted to retinoic acid, it is essential for skin health, teeth remineralisation and bone growth. Hence, it is also known as anti-infection vitamin.

A phenomenon in which species that live together in the same environment tend to diverge in those characteristics that overlap; exemplified by Darwin's finches.

It is the change in frequency of a gene variant in a population due to random sampling.

Cyanobacteria is the blue green algae that contains chlorophyll, hence these are producers.

These are membrane derived second messengers. They play crucial roles in diverse cellular functions such as cell growth, apoptosis, cell migration, endocytosis, and cell differentiation.

In the intertidal zone, the most common organisms are small and most are relatively uncomplicated organisms.

Endocrine glands are glands that secrete their products, mainly hormones, directly into the blood. Tropic hormones are hormones that have other endocrine glands as their target.

Juvenile hormones (JHs) are a group of acyclic sesquiterpenoids that regulate many aspects of insect physiology.