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lara31 [8.8K]
4 years ago
14

Question 16

Biology
1 answer:
nika2105 [10]4 years ago
5 0

Answer and Explanation:

The Cretaceous–Paleogene extinction, which occurred around 66 million years ago, is defined as a mass extinction that wiped out around three-quarters of species on Earth.

Among the organisms that disappeared during this event, we find mammals, birds, fish, sharks, pterosaurs, birds, reptiles, insects, and some plant species.

This event is marked by the presence of a sediment layer known as the K-Ph boundary which showed important levels of iridium, an element that is abundant in craters. Therefore, after its discovery, scientists hypothesize this extinction occurred due to the impact of the giant Chicxulub crater which changed the conditions of the atmosphere.

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In order to expand agriculture and stimulate a sagging economy, the Brazilian government eased environmental laws which allowed
siniylev [52]

Deforestation is the progressive decrease of the forest as a consequence of human activities. This practice (deforestation) irreversibly alters the ecosystem and has adverse effects on human health.

Deforestation is the progressive decrease of the forest regions in order to use deforested lands with diverse purposes (e.g., agriculture, urbanization, etc).

In the short-medium term, deforestation may lead to many negative outcomes associated with the loss of biodiversity.

Moreover, it is well known that trees release oxygen and consume carbon dioxide during photosynthesis.

In consequence, in the long term, deforestation may cause climate change (e.g., desertification, soil erosion, flooding, etc.), which is associated with an increased amount of greenhouse gases in the atmosphere.

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3 years ago
PLZ HELP<br> i'll give brainliest to whoever answers best<br> What are biogeochemical cycles?
Vsevolod [243]

Answer:

A biogeochemical cycle is one of several natural cycles, in which conserved matter moves through the biotic and abiotic parts of an ecosystem

Explanation:

6 0
3 years ago
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Diapedesis is the process by which red blood cells move into tissue spaces from the interior of blood capillaries. True or False
Lana71 [14]

Answer:

False

Explanation:

Diapedesis is the process by which white blood cells move into tissue spaces from the interior of blood capillaries. It is the process of emigration of WBCs from the bloodstream. With the help of adhesion molecules, WBCs become attached to the endothelium of the blood vessels and squeeze between these cells. The adhesion molecules bind to the sugar moieties present on the surface of WBCs. Phagocytic WBCs such as neutrophils arrive at the site of infection by the process of diapedesis only.  

7 0
4 years ago
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What does it mean to say that the U.S. Government has a balanced budget?
Gemiola [76]

Explanation:

A balanced budget occurs when revenues are equal to or greater than total expenses. A budget can be considered balanced after a full year of revenues and expenses have been incurred and recorded.

6 0
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Ability to move or change matter
Arturiano [62]

Answer:

<u>Energy</u> is defined in science as the ability to move matter or change matter in some other way.

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