Human (Homo sapiens)

Human (Homo sapiens) is a species of animal in the Hominidae, bipedal, large and complex brains that allow the development of sophisticated tools, are omnivores and have used fire to prepare and cook food, are highly social and tend to live in complex social structures.

H. sapiens has a body consisting of legs, trunk, arms, neck and head. The only primate to have short, relatively flat canines and gradually lose third molars with some individuals not having them congenitally.

Residual tail, appendix, flexible shoulder joints, opposing clasped fingers and thumbs, comparable density of hair follicles to other apes dominated by vellus hair which is mostly so short and thin that it is practically invisible. Average height 171 cm, has an accurate throw and is the best long distance runner in the animal kingdom.

Each somatic cell has two sets of 23 chromosomes, each set received from one parent. Gametes have only one set of chromosomes as a mixture of two parent sets. XY sex determination system, females have XX sex chromosomes and males have XY. Most reproduction is via internal fertilization, gestation period is 38 weeks, but normal pregnancy can vary up to 37 days.

Human is highly adapted and cosmopolitan and is found in almost all regions of the world, including tropical rainforests, arid deserts, the frigid Arctic region, and highly polluted cities.

Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Primates
Suborder: Haplorhini
Infraorder: Simiiformes
Family: Hominidae
Subfamily: Homininae
Tribe: Hominini
Genus: Homo
Species: Homo sapiens

Comments

Indian rosewood (Dalbergia latifolia)

Sonokeling or Java palisandre or Indian rosewood ( Dalbergia latifolia ) is a species of plant in the Fabaceae, a large tree producing hardwood, medium weight and high quality, rounded leaves, thin and broad pods, highly adaptive, grows in dry and rocky landscapes with lots of sunlight. D. latifolia has medium to large size, cylindrical stems, up to 40 m high with a ring of up to 2 m, the bark is brownish gray and slightly cracked longitudinally. The crown is dense, dome-shaped and sheds leaves. The leaves are compound and pinnate oddly with 5-7 strands that have different sizes and appear alternately on the shaft. The leaves are round or elongated in width or heart, the upper surface is green and the surface is pale green. The flowers are small, 0.5-1 cm long and clustered in panicles. The pods are green to brown when ripe and are elongated lanceolate, pointed at the base and tip. The pods have 1-4 seeds which are soft and brownish. Indian rosewood grows at elevations below 600 m,

Sengiran (Pittosporum moluccanum)

Sengiran ( Pittosporum moluccanum ) is a species of plant in the Pittosporaceae, small tree, up to 7 meters high, green leaves, elliptical to narrow elliptical, up to 17 cm long, up to 6 cm wide, sharp tip, narrow base and 1-1.5 cm long stalk. P. moluccanum has an inflorescence which is a collection of flowers. The fruit is red, capsule-shaped, elongated oval, sharp tip, 2 broken valves containing small and red seeds. This species grows in forests, plantations, roadsides, open or shaded areas. Kingdom: Plantae Phylum: Tracheophyta Subphylum: Angiospermae Class: Magnoliopsida Order: Apiales Family: Pittosporaceae Genus: Pittosporum Species: Pittosporum moluccanum

Evolution theory goes beyond

OPINION - As a Wallacean and Darwinian, I have always viewed life from the perspective of evolutionism. I see the world of plants and animals always using evolutionary theories. How a species develops functional organs, forms morphology, adapts to ecosystems and so on as a natural laws. This perspective ultimately forms my framework for thinking about various things, including the way I see myself, everyday problems and the way I think about big things such as economics, geopolitics, war and so on using an evolutionary perspective. Alfred Russel Wallace, Charles Darwin and Jean-Baptiste Lamarck are three great figures who really inspired me. They are well known as pioneers of evolutionary theories. They start from small things in the sub-subject of biology, although they also discuss geology and so on. Wallace focused on species adaptation and Darwin on sexual selection. Both developed evolutionary thinking using observational methods. Lamarck focused on structural morphology using l

Dlium

Search This Blog