Answer:
What is biodiversity?
It is the variety of life on Earth, in all its forms and all its interactions. If that sounds bewilderingly broad, that’s because it is. Biodiversity is the most complex feature of our planet and it is the most vital. “Without biodiversity, there is no future for humanity,” says Prof David Macdonald, at Oxford University.
The term was coined in 1985 – a contraction of “biological diversity” – but the huge global biodiversity losses now becoming apparent represent a crisis equalling – or quite possibly surpassing – climate change.
More formally, biodiversity is comprised of several levels, starting with genes, then individual species, then communities of creatures and finally entire ecosystems, such as forests or coral reefs, where life interplays with the physical environment. These myriad interactions have made Earth habitable for billions of years.
A more philosophical way of viewing biodiversity is this: it represents the knowledge learned by evolving species over millions of years about how to survive through the vastly varying environmental conditions Earth has experienced. Seen like that, experts warn, humanity is currently “burning the library .
Explanation:
Mechanical weathering is the physical disintegration of rock into bits and masses.
In this process, agents of weathering combines to fracture rocks into bits. There are different type of mechanical weathering. It is also known as physical weathering.
- Frost wedging occurs in temperate and polar regions where temperature is very low. Cracks in rocks are filled water and when the freezes it expands. As the water melts during summer and freezes in the winter, frost wedge forms.
- Salt crystal growth on rocks can cause mechanical weathering.
- Pressure release from the surface of rock leads to exfoliation domes.
- Wetting and drying of a rock leads to mechanical weathering
- Expansion and contraction of rock
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Answer:
D
Explanation:
any of a large group of organic compounds occurring in foods and living tissues and including sugars, starch, and cellulose. They contain hydrogen and oxygen in the same ratio as water (2:1) and typically can be broken down to release energy in the animal body.
Homeostasis is the state of maintaining steady internal conditions by the living organisms. Cells obtain energy through the process of cellular respiration. It is a metabolic process of conversion of the biochemical energy from the nutrients into adenosine triphosphate (ATP). It also maintains the temperature of the body. The energy produced during this process is used in the cell division and repair of the cells by the breakdown of ATP and maintains homeostasis. They exchange substances with the new cells and also eliminate the wastes thereby maintaining homeostasis.