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Ne4ueva [31]
3 years ago
15

How long has earth been in it’s current era

Biology
1 answer:
Alla [95]3 years ago
6 0

Answer: Such constant change has characterized Earth since its beginning some 4.5 billion years ago. From the outset, heat and gravity shaped the evolution of the planet. These forces were gradually joined by the global effects of the emergence of life.

Explanation:

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Mary has type A blood and her husband (John) has type B blood. John's parents both had type AB. Mary and John have three childre
pav-90 [236]
Since Mary has a Type A blood, she is either AA or AO while John is either BB or BO. Since both John's parents are Type AB, he can only have the either A or B as an allele and not O so he is BB. Since John can only give the B allele, all of his children must have the B allele in their blood types. So the adopted one is the child with type A blood.
8 0
3 years ago
What is the thin layer of endothelial tissue that lines the inner surface of the heart and the valves called
serious [3.7K]

Answer:

Endocardium

Explanation:

The endocardium makes the innermost lining of the wall of the heart. It is present over the thin layer of connective tissue. The function of the endocardium is to provide a smooth lining for the chambers of the heart. The valves present in the heart also have endocardium. The dense connective tissue of the heart valves is covered by endocardium.

The presence of the smooth endocardium made up of endothelium reduces the surface friction as blood passes through the heart. The endocardium of heart chambers is continuous with the endothelial lining of the large blood vessels that are attached to the heart.

8 0
3 years ago
Consider the three equations below.
Andrew [12]

Answer:

(D)

Explanation:

Just took the test on edge

7 0
3 years ago
To find the main idea of a piece of writing,you can employ the techniques in which you?​
Alika [10]

Answer:

The main idea in a given piece of reading is implied by the introductory paragraph, and, or several meaning sentences that are in subsequent paragraphs.

Explanation:

The main ideas in the a given piece of work, specifically reading is contained in the first paragraph of the piece of writing. The first paragraph can be used to imply the main ideas in a topic without necessarily revealing it. The first concepts, terms, illusion and characters mentioned, certainly we can deduce the main idea.

Several sentences in paragraphs that carry almost similar, related and interrelated facts, in most cases are very essential in explaining the main idea.  By looking at them in various paragraphs, one is able to find the sole message being communicated.

5 0
3 years ago
The oxygen level of a lake suddenly starts decreasing. A biologist believes that photosynthetic organisms in the community have
Semmy [17]

Answer:

Scientists with different educational backgrounds can come to different interpretations of the same data.

Choice A is correct

Explanation:

A biologist is a scientist with specialized knowledge in the field of biology while a geologist is a scientist who studies the matter that make up the Earth as well as the processes that shape them.

Both scientists came to different interpretations of the same data since they have different educational backgrounds.

7 0
3 years ago
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