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Biodiversity

This category is for questions about biodiversity, or species diversity, which is composed of genetic, species, and ecosystem diversity.

1,421 Questions

How did Aristotle classified animals on the basis of?

Aristotle's classification of animals grouped together animals with similar characters into genera (used in a much broader sense than present-day biologists use the term) and then distinguished the species within the genera. He divided the animals into two types: those with blood, and those without blood (or at least without red blood). These distinctions correspond closely to our distinction between vertebrates and invertebrates. The blooded animals, corresponding to the vertebrates, included five genera: viviparous quadrupeds (mammals), birds, oviparous quadrupeds (reptiles and amphibians), fishes, and whales (which Aristotle did not realize were mammals). The bloodless animals were classified as cephalopods (such as the octopus); crustaceans; insects (which included the spiders, scorpions, and centipedes, in addition to what we now define as insects); shelled animals (such as most molluscs and echinoderms); and "zoophytes," or "plant-animals," which supposedly resembled plants in their form -- such as most cnidarians.

What is the greatest threat to biodiversity in Latin America?

Deforestation is one of the greatest threats to biodiversity in Latin America. The clearing of forests for agriculture, urbanization, and logging has led to the loss of habitat for many species, resulting in a decline in biodiversity. Climate change is also a significant threat, affecting ecosystems and species survival in the region.

Calvin cycle takes place in the?

Calvin cycle takes place in the stroma of chloroplasts in plant cells. It is a series of reactions that occur during the light-independent stage of photosynthesis, where carbon dioxide is fixed into glucose molecules using ATP and NADPH produced during the light-dependent reactions.

What is germplasm?

Gene is a segment of DNA that is located in a chromosome and that codes for a specific hereditary trait while Germ Plasm is hereditary material (chromosomes and genes) that is usually contained in the protoplasm of germ cells.

What is an example of competitive exclusion principle?

Example: Squirrels in Britain

The Red Squirrel (Sciurus vulgaris) is native to Britain but its population has declined due to competitive exclusion, disease and the disappearance of hazel coppices and mature conifer forests in lowland Britain.

The Grey Squirrel (Sciurus carolinensis) was introduced to Britain in about 30 sites between 1876 and 1929. It has easily adapted to parks and gardens replacing the red squirrel.

Today's distribution is shown below.The Grey SquirrelThe Red Squirrel

What is microbial biodiversity?

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About this book Preview this book By Alexander N. Glazer, Hiroshi Nikaido

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Knowledge in microbiology is growing exponentially through the determination of genomic sequences of hundreds of microorganisms and the invention of new technologies such as genomics, transcriptomics, and proteomics, to...

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What can be done to protect biodiversity?

Protecting biodiversity can be achieved through creating and enforcing laws that regulate land use and resource management, establishing protected areas such as national parks and reserves, promoting sustainable practices in agriculture and fishing, and raising awareness about the importance of biodiversity conservation among the public. Collaboration between governments, NGOs, businesses, and local communities is also crucial in protecting biodiversity.

What are factors affecting biodiversity?

There are negative and positive factors affecting biodiversity. The major negative factor is habitat loss and pollution. Some positive factors include restoration and protection of unique habitats, reduced pollution levels by the development of advanced chemistry technologies and better waste disposal processes and the natural changing of regional and global climate conditions.

What is the biodiversity in the tundra?

The tundra has low biodiversity due to its extreme cold temperatures and short growing season. Plant diversity is limited to low-growing shrubs, grasses, mosses, and lichens. Animal diversity is also low, with species such as musk oxen, reindeer, Arctic foxes, and polar bears adapted to the harsh conditions.

Why is biodiversity important to people?

Humans need food to survive without biodiversity all most foods might not be available.

Increased by biodiversity equals a stable environment.

Includes with, human health, medicines, food, finding infections in the body, and shelter pro productions.

What do biodiversity crisis mean?

A Biodiversity crisis is the rapid loss of species and the rapid degradation of ecosystems. This threat is greater than global climate change and the impact will affect the prosperity of humankind.

Describe the effects of humans on the ecosystem with emphasis on examples of intenational importance tropical rain forest Oceans River?

well u see ecostyems, global warming are just terrible myths which aren't true.. NOT we affect the earth by leaving trash on the ground, also we use to much electricity... That's why we have daylight savings hour!

so keep fishing

keep building dams

keep cutting down forests

if you want to wrek the earth!

Fixed by Blackie1004

Definition of environmental studies?

Environmental Studies is the interdisciplinary study of how humans interact with their environment. This field examines all aspects of the natural environment, social environments, politics, ecology, etc., and how they all work together.

Can you explain the loss of biodiversity?

1. assuming there is a loss of biodiversity, which has not been established beyond reasonable doubt:

a. human intervention

b. natural disasters

c. maladaption to environment.

a. this is for example the case of the condor, which is almost extinct as a result of dams

being built in mountainous areas, depriving it of some of its natural habitat. another example is the dodo which was hunted for fun to the point of extinction.

b. natural disasters. it is believed at present that a meteorite containing large amounts of iridium caused a natural kind of nuclear winter, wiping out the dinosaurs. thus we have no dinosaurs today. no, they were not wiped out in the biblical flood, that is a children's story.

c. some creatures are not well adapted to their environments or cannot adapt when they change. an example of this is _amphibia_. frogs, newts and toads require damp or moist environments, generally, (though you do find some in desert conditions). thus when an area dries up, they die out because they cannot travel over the dried-up area to another moist area.

2. there is an argument to be made that biodiversity is not decreasing. large dangerous animals are decreasing in diversity, however, insects, if anything, are increasing, as well as other smaller animals that humans can't easily eradicate. so for example, they recently found a new kind of elephant shrew. this doesn't mean it evolved recently, but that we have reason to believe more animals are evolving, ie that evolution has not stopped. (no, the bible does not work as a science textbook and the book of genesis is false). an example of animals adapting to human presence has occurred in my hometown of Johannesburg, south Africa. in 1985 we generally only had weavers (yellow finch-like birds). then we started getting hadedas (African ibises). by 1987 we started seeing crested barbets (a kind of woodpecker), and by 1990 loeries (grey African turacos). recently we have started seeing hoepoes (a kind of small bird similar in appearance to a ibis), as well as wood hoepoes (which are iridescent green versions of the brown ones), plus red bishops (like weavers but bright red). and so on. so these birds, having discovered that there's more food in our rubbish bins and on our gardens' fruit trees, have migrated into the cities to live amongst people rather than out in the veld (prairie) where there is less food.

How would you respond to someone who syas that because extinction is a natural process you should not worry about the loss of biodiversity?

Tell them that just because something is natural, sdoesn't mean it's good! (Poisen Ivy anyone?) they are right and wrong.many species have gone simply because of the stupidity of humans,not by natural process.

How is the Calvin cycle completed?

The Calvin cycle is completed when the cycle of chemical reactions converts carbon dioxide into glucose. This process requires the input of ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate), which provide the energy needed to drive the reactions. The final step of the Calvin cycle regenerates the molecule needed to start the cycle again.

What is the 7 level of classification for a dog?

Kingdom: Animalia

Phylum: Chordata

Class: Mammalia

Order: Carnivora

Family: Canidae

Genus: Canis

Species: Canis lupus

Subspecies: Canis lupus familiaris (includes all dogs)

Define the term Columbian Exchange What were the short and long term consequences of this exchange?

As a result of Columbus's voyages to the New World, a biological pipeline between America and Europe opened up that had been apart since before humans appeared on earth. The lands had drifted apart that had once been connected. Some species of plants and animals flourished in both areas, and some did not. There were many new animals and plants in the Americas that Europeans had never seen. And, Europeans brought plants and animals to the New World that America had never seen. This includes viruses and other biological organisms. The new animals brought to America upset the ecology of the area. The people living in the Americas did not have resistance to many of the "germs" brought by the Europeans. Biologically, the Indians had not been exposed to measles, smallpox, whooping cough, chicken pox, and influenza. The effect of these diseases on the Americans was catastrophic. Bacteria and viruses killed more Native Americans than did Spanish swords. The Indians also gave to the Europeans, venereal disease. Medical historians disagree on the origins of syphilis, but it was first identified by physicians in 1493, in Cadiz, Spain, the port which Columbus returned to after his first voyage. The Colombian Exchange was also a cultural exchange. New agricultural developments were traded, economic activity and opportunities opened up between the New and Old Worlds, and new ideas were exchanged.

What is the difference between natural selection and artificial selection?

Natural selection is when 'nature chooses' the organism with the favourable characteristics to survive. E.G. Giraffe's Long-necked giraffes are 'chosen by nature' because they have the favourable characteristic of being tall, which allows them to reach higher branches in higher trees. Whilst shorter-necked giraffes cant reach this food source and as the shorter trees run out of vegetation, the shorter-necked giraffes will end up dead.


Artificial selection is when 'man-chooses' the organism that he wants because of their favorable characteristics,
E.G Choosing the 'fat' cows to breed to produce more fat cows because they have more meat in them. This will in-turn affect the numbers of the 'skinner' cows with undesirable characteristics.
Artificial selection is where man selects organisms with useful characteristics to him whereas natural selection is the process whereby nature selects the fittest organisms.

A2. Some social insects such as ants employ aphids to grow fungi, it follows that the ants also have a part to play in Artificial Selection, in both the aphids and the fungi. So it is not just man.

Why is biodiversity important to the stability of food webs?

Biodiversity helps to create a balance between different members of the food chain and that preserves their existence. When there are too many preys, the animals in the lower food chains will reduce in number and start a vicious cycle of starvation and extinction.

Scientific name for moss?

There are about 12,000 species of moss. The scientific division of moss is Bryophyta. Species of moss include: Bryum capillare, Ceratodon purpureus and Dicranella heteromalla.

What is a workaholic?

A workaholic is someone who is excessively dedicated to their work, often to the detriment of their personal life and well-being. They may have an addiction to work that interferes with their ability to relax and enjoy life outside of work.

The major job of genes is to control what?

The major job of genes is to control the production of proteins in the cell by providing instructions for amino acid sequence. Genes determine physical traits, such as eye color and height, and also play a role in directing cell function and development. They are responsible for passing hereditary information from one generation to the next.

Did Chevy make a 6 lug 2500 pick up in 1988?

yes, they are whats called a light duty 2500, their pretty much a 1500 series that came standard with all the heavy duty suspension peices all of which were optional on the 1500. yes, they are whats called a light duty 2500, their pretty much a 1500 series that came standard with all the heavy duty suspension peices all of which were optional on the 1500.

What is the difference of formal and informal counseling?

an informal document is a document usually sent internally in companies to tell people what to do next or that they habve to go somewhere A formal document is a document adhering to traditional standards of correctness. A formal document is usually sent when an entity is communicating with other external entities. A informal document is a document that is not officially recognized or controlled. Eg. when an employee sends a weekly status to his direct manager. Usually informal documents are common within the same entity.