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lana66690 [7]
3 years ago
9

.In women, aging becomes a significant risk factor for heart disease after the age of:

Biology
1 answer:
Gennadij [26K]3 years ago
8 0

Answer: option b - 55

Explanation:

Menopause signifies the time in a woman's life when menstruation ends, usually BETWEEN age 45 - 55.

And because of the crucial role played by Oestrogen in menstruation, its LOSS increases the RISK of HEART DISEASE seen in women AFTER MENOPAUSE .

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Arada [10]

Answer:

B) Competition for mates

Explanation:

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3 years ago
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biologists is studying two species of lizards in a mountainous region. The two species are separated by habitat with one species
ivann1987 [24]

Answer:

Valley lizard = Oviparous

Mountain lizard = Viviparous

Explanation:

In Darwin's theory survival of the fittest, he believed species adapt or change within their environment. So I believe lizards living in a valley would be more safe to lay their eggs but lizards living in the mountains would be viviparous because of the non-predicted and unsafe environment which could harm the better chances of development of the offspring.

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3 years ago
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Alenkinab [10]

The following tests can determine the mineral in a rock specimen:

1. How does the rock crumble or split under pressure?

2. What is the texture of the rock?

3. Observing it under a magnifying lens.

4. Determine the color of the rock



Test 1 and 3 determines if the rock is granular and the types of grains in the rock. Test 3 also determines if the rock has layers hence sedimentary rock.

Determining whether color of the rock is dark or light also helps identify the mineral and type of rock.



5 0
3 years ago
In order to survive,all organisms must carry out
lions [1.4K]

Answer:

Enzyme-controlled reactions (digestion, synthesis, growth, regulation, reproduction, circulation, excretion)

Explanation:

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3 years ago
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arsen [322]

Answer:

1. Radiometric dating

2. Relative dating is used to determine the age of fossils or rock layers by by comparing it to similar rocks and fossils of known ages.

3. The youngest rock layers are at the top and the oldest are at the bottom, which is according to the law of superposition.

4. Tribolite and Pecten fossils

Fossils are used to determine the ages of rock layers. Index fossils are the most useful in determining relative aging. Index fossils are of organisms that lived for a short period of time. An index fossil allows a scientist to determine the age of the rock it is in. So if they are found in a particular age, it means they belong in that age.

5. Scientists commonly use radioactive dating methods by using radioactive decay cloak of certain elements such as potassium or carbon to date fossils or rocks.

6. Law of superposition because in terms of finding the age of the rock as an object, all that needs to be identified are the layers of the rock.

7. The nuclear decay of radioactive elements are a process that behaves in a clock-like fashion which makes it a useful tool for determining the exact age of fossils or rocks.

4 0
3 years ago
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