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SVETLANKA909090 [29]
3 years ago
5

Charles Darwin spent over 20 years developing his theory of natural selection. True or false?

Biology
1 answer:
Oksanka [162]3 years ago
7 0
This is true, Darwin spent over 20 years developing his theory of natural selection
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What happen if interference in blood flow occur??
ivann1987 [24]
Think of a stroke as a "brain attack"— it is an emergency! When symptoms appear call 911 immediately; every minute counts. A stroke occurs when the brain is deprived of blood supply. Without oxygen brain cells die. Depending on the area affected, a person may have problems speaking, walking, seeing, or thinking. It may result in permanent brain damage, disability or death. If the stroke is caused by a blood clot, a clot-busting drug may be given to restore blood supply.To understand stroke, it is helpful to understand the circulatory system of the brain (see Anatomy of the Brain). Blood is carried to the brain by two paired arteries, the internal carotid arteries and the vertebral arteries (Fig. 1). The internal carotid arteries supply the anterior (front) areas and the vertebral arteries supply the posterior (back) areas of the brain. After passing through the skull, the right and left vertebral arteries join together to form a single basilar artery.

The basilar artery and the internal carotid arteries “communicate” with each other in a ring at the base of the brain called the Circle of Willis by the anterior communicating (Acom) and posterior communicating (Pcom) arteries. The middle cerebral artery is the artery most often occluded in stroke.


8 0
3 years ago
How does water having high specific heat capacity and high heat of vaporization help life on earth?
Tanzania [10]

Answer:

its good

Explanation:

the can evaporate and make clouds which cause rain which can water plants

8 0
3 years ago
A person studying a particular field has published her findings. The findings are not testable by others. This person is most li
Crazy boy [7]

Astrology

Explanation:

A person studying the field of Astrology would not have her finds testable  by others because most are descriptive and not experimental in nature.

Astrology is a pseudoscience claiming divination by the positions of the planets and sun and moon.

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  • Most astrologers use positions of planetary bodies to predict future events and some topical matters.
  • Astrology is not pure experimental science that can be tested using sophisticated instruments in the laboratory or in the field.
  • Biology is the study of life and follows the scientific way of studying nature.
  • Chemistry and physics are pure sciences that follows the scientific nature in their investigation.

learn more:

Science brainly.com/question/1721226

#learnwithBrainly

5 0
3 years ago
Granite is a coarse or medium-grained rock that is rich in quartz and feldspar. It is formed when bodies of magma cool and harde
drek231 [11]

Answer:

Igneous

Explanation:

3 0
3 years ago
What is the relationship between period and frequency?
Veronika [31]
<span>Time period refers to as how much a certain thing took to complete one cycle</span>
5 0
3 years ago
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