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AfilCa [17]
3 years ago
12

The Living Planet Index (LPI), which measures trends in thousands of vertebrate species populations, shows a decline of 52% betw

een 1970 and 2010. Biodiversity is declining in both temperate and tropical regions, but the decline appears to be greater in the tropics. According to the World Wildlife Federation (WWF) population sizes of terrestrial vertebrate species have halved over the last 40 years.
Along with hunting, ______________ is the major cause of the decrease in the terrestrial vertebrates throughout the world.

A) air pollution B) habitat change C) climate change D) invasive species
Biology
2 answers:
Natali5045456 [20]3 years ago
7 0

The world's biodiversity is declining at an alarming rate. Population sizes of vertebrate species measured by the Living Planet Index (LPI) have ... The LPI, which measures trends in thousands of populations of mammals, birds, reptiles, ... Populations of terrestrial species declined by 38 per cent between 1970 and 2012.

Naya [18.7K]3 years ago
6 0

Answer:

B) habitat change

Explanation:

Habitat destruction (along with hunting and fishing) stands out among the factors that trigger biodiversity depletion. Usually this process occurs as a result of urbanization and deforestation to increase agricultural areas and development of major works. In addition, this destruction is also caused by global warming.

As their habitat is destroyed, many species are often forced to migrate to other areas, facing dangers and uncertainty of survival. Those species that are unable to find another place to settle, such as plants, have their population reduced or even often extinct.

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Hydrogen bonds :

are the chemical mechanism that governs the complementarity of the bases of DNA. This correspondence is unique thanks to the geometry of the hydrogen donor atoms and the acceptors that form the bases.

The (hydrophobic) bases are stacked inside the double helix of DNA; their plane is perpendicular to the axis of the double helix. The outside (phosphate and sugar) is hydrophilic.

The hydrogen bonds between the bases of one strand and the bases of the other strand keep the 2 strands united.

One purine on one strand necessarily binds to a pyrimidine on the other strand. As a corollary, the number of purine residues is equal to the number of pyrimidine residues.

* A binds to T (by 2 hydrogen bonds).

* G binds to C (via 3 hydrogen bonds: more stable bond: 5.5 kcal vs 3.5 kcal).

What part of the DNA strand do hydrogen bonds hold together?

hydrogen. Covalent bonds occur within each linear strand and strongly bond the bases, sugars, and phosphate groups (both within each component and between components). Hydrogen bonds occur between the two strands and involve a base from one strand with a base from the second in complementary pairing.

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