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VLD [36.1K]
3 years ago
12

Which of the following mammals were domesticated about 2000 years ago and are currently herded by native people of northern Asia

?
A - Arctic Wolf

B - Reindeer

C - Bighorn Sheep

D - Dall Sheep
Biology
2 answers:
True [87]3 years ago
8 0

reindeer

hope this helps :)

Zolol [24]3 years ago
4 0

The answer is B. Reindeer.  

Mark as brainiest pleasee.

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So if earth's orbit is closer to the sun than Mars'
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Explanation:

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3 years ago
Why is it important for ectoparasites to stay undetected by their host?
melomori [17]

Ectoparasites cause diseases in humans and animals, so to know the format of detecting it we need to know that ......

<h3>Ectoparasite</h3><h3 />

Parasitism is defined as an interaction where a parasitic organism obtains resources through one or several host individuals, causing damage and reducing its fitness. The endoparasite is a type of parasite that lives inside the host's body (from the Greek endos, inside), while the ectoparasite is one that lives on the external surface of its host (from the Greek ectos, outside). Thus, the ectoparasite does not need to lodge inside the host organism to feed, presenting a partial metabolic dependence. Some examples of ectoparasites are:

  • Lice
  • Ticks
  • and Fleas.

<h3>Strategies of ectoparasites</h3>

Each parasite has particular strategies and adaptations used to extract nutrients from their hosts. In ectoparasites these adaptations can often be seen as changes in the oral apparatus, allowing them to penetrate the skin surface and feed on the host's nutrients. Scabies is a skin disease caused by the ectoparasite <em>Sarcoptes scabiei</em>. In order to obtain nutrients for its survival, the parasitic organism burrows into the skin of the host, unlike ectoparasites such as the louse, which pierce the surface and only insert its mouthparts to extract food.

<u>With this information we can say that the </u><u>ectoparasites </u><u>adapt to the host so that it is </u><u>not noticed </u><u>and for a better </u><u>absorption of nutrients </u><u>from the host, they remain </u><u>undetectable</u><u> not to be </u><u>removed</u><u>, so that they are not </u><u>disconnected</u><u> from their </u><u>food source</u><u> as they are in the vast majority visible to the eye.</u>

Learn more about diseases in brainly.com/question/943439?referrer=searchResults

7 0
2 years ago
Explain how natural selection can be involved in speciation and the role that isolation can have in this.
evablogger [386]

Natural selection would cause speciation because the new advantageous traits introduced in the population would help species survive and adapt to the new environment they are in because of isolation. The ability to make best from available leads to speciation in isolation.

Explanation:

Natural selection is a an important element of evolution. The change in traits which are beneficial and heritable are transferred from one generation to other. These traits come from random mutations.

Speciation is a process in which an existing population diverge in to two distinct population or species due to geographic barrier or without it also. The speciation occurs when species from one group become reproductive isolated.

When a group of species become isolated on an island or some other geographic boundary.

The increase or introduction of new beneficial genes in a population is caused by natural selection process. The populations manage to survive and adapt the new environment and become a new species if left isolated.

5 0
3 years ago
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