Search results
Results from the WOW.Com Content Network
These vacuoles make up most of the cell. As these vacuoles swell, the cell grows considerably which is the primary factor contributing to the record sizes of Thiomargarita cells. T. namibiensis holds the record for the world's second largest bacterium, with a volume three million times more than that of average bacteria. [29]
Diatoms, unicellular algae that have siliceous cell walls. [46] They are the most abundant form of algae in the ocean, although they can be found in fresh water as well. [46] They account for about 40% of the world's primary marine production, and produce about 25% of the world's oxygen. [47] Diatoms are very diverse, and comprise about 100,000 ...
The smallest penguin species is the little blue penguin (Eudyptula minor), which stands around 30–33 cm (12–13 in) tall and weighs 1.2–1.3 kg (2.6–2.9 lb). [74] The smallest bird of prey is the Black-thighed falconet (Microhierax fringillarius), with a wingspan of 27–32 centimetres (11–13 in), roughly the size of a sparrow. [75]
Not all animals have neurons; Trichoplax and sponges lack nerve cells altogether. Neurons may be packed to form structures such as the brain of vertebrates or the neural ganglions of insects . The number of neurons and their relative abundance in different parts of the brain is a determinant of neural function and, consequently, of behavior.
Their nerve cells arise from the same progenitor cells as the colloblasts. [40] In addition, there is a less organized mesogleal nerve net consisting of single neurites. The largest single sensory feature is the aboral organ (at the opposite end from the mouth), which is underlined with its own nerve net. [41]
The largest is the dobsonfly Acanthacorydalis fruhstorferi, which can have a wingspan of up to 21.6 cm (8.5 in), making it the largest aquatic insect in the world by this measurement. [38] This species is native to China and Vietnam, and its body can be up to 10.5 cm (4.1 in) long. [39]
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
Batomorphi is a clade of cartilaginous fishes, commonly known as rays, this taxon is also known as the superorder Batoidea, but the 5th edition of Fishes of the World classifies it as the division Batomorphi. [2] They and their close relatives, the sharks, compose the subclass Elasmobranchii. Rays are the largest group of cartilaginous fishes ...