Winterbottom’s sign
(Science: clinical sign) swelling of the posterior cervical lymph nodes, characteristic of early stages of african trypanosomiasis; useful for surveys or control of migrations from endemic areas of persons with preclinical infections.
In plants, growth occurs in meristems, which are the site of repeated cell division of unspecialized cells. These cells ..
Multicellular organisms evolved. The first ones were likely in the form of sponges. Multicellularity led to the evolutio..
Photosynthesis is the process that plants undertake to create organic materials from carbon dioxide and water, with the ..
Lotic communities have conditions that are rather harsh for typical plants. Thus, the diversity of plant species in loti..
The human body is capable of regulating growth and energy balance through various feedback mechanisms. Get to know the e..
With regard to the population size of a species and what factors may affect them, two factors have been defined. They ar..