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2 years ago

Describe Henrietta Leavitt's discovery, and explain why it was so important in the society in which she lived.

Biology

2 answers:

spayn [35]2 years ago

8 0

<h2>Henrietta Discovery </h2>

Henrietta Swan Leavitt discovered cepheids in 1908 during the investigation of different stars in the clouds. She published it by working more on it in 1912 and died in December 1921. This discovery was so important in the society in which she lived because the cosmologist of America was known for this discovery of Cepheids which is a relationship between period, luminosity and quivering stars which changes in light.

Svetach [21]2 years ago

6 0

Answer:

Explanation:

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Ierofanga [76]

I think the appropriate would be the heart muscles and the renal cortex. Ketone bodies are three water-soluble molecules (acetoacetate, beta-hydroxybutyrate, and their spontaneous break down product, acetone) that are produced by the liver from fatty acids during low food intake (fasting), carbohydrate restrictive diets, starvation, prolonged intense exercise, alcoholism among others. In some tissues acetoacetate and beta-hydroxybutyrate can be reconverted to acetyl-CoA to produce energy. The heart gets much of its energy from ketone bodies, although it also uses a lot of fatty acids. The brain gets its energy from ketone bodies when insufficient glucose is available, e.g. during fasting.

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2 years ago

An organic disorder whose symptoms tend to develop gradually and worsen over time is

Ne4ueva [31]

Answer:

Explanation:

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I hope this helps.

7 0

2 years ago

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11. The surface area of rocks exposed to

Andreyy89

d. jointing

Explanation:

The surface area of rocks exposed to weathering is increased by jointing.

Jointing in rocks increases their surface area.

Surface area is the outer part of something.
Mechanical weathering or physical weathering is highly renowned agent for increasing the surface area of rocks.
When rocks fracture they creates cracks called joints.
Joints increases the amount of surface exposed.
Chemical weathering goes faster in surfaces with increased surface area.

learn more:

Surface area brainly.com/question/7227193

#learnwithBrainly

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2 years ago

Fats are an important dietary requirement that play a number of roles in the body. Fats transport fat-soluble vitamins in the bo

Ganezh [65]

1. The right answer is Vitamin D.

Vitamin D is a fat-soluble vitamin (soluble in lipids). It is a hormone found in food and synthesized in the human body from a derivative of cholesterol or ergosterol under the action of UVB1 radiation from the Sun.

In humans, it exists in two forms: D2 (ergocalciferol) produced by plants or D3 (cholecalciferol) of essentially animal origin or synthesized in the skin under the effect of ultraviolet rays. Some plants, especially lichens, also produce the D3 form. These two molecules are 9,10-secosteroids.

2. The right answer is Linoleic acid.

Linoleic acid is a polyunsaturated fatty acid, type omega-6, found in vegetable oils, especially in safflower oil.

It is an essential fatty acid, it must be brought to the body through food.

Its carbon chain consists of 18 carbon atoms, and two double bonds, one involving the sixth carbon, and the other the ninth.

Its melting temperature is -9 ° C, which makes linoleic acid liquid at room temperature.

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2 years ago

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The role of pigments in the photosynthesis reaction is to

pashok25 [27]

Answer:

Option A, Start the reaction by absorbing light energy

Explanation:

Chlorophyll is a green color pigment in plant that helps in entrapping sunlight. Being green in color, it absorbs the blue and red light and reflects the green light. The molecules of chlorophyll gains energy from sunlight and then jumps to higher energy levels by the process known as photo excitation. These excited molecules get ionized to further initiate the process of photosynthesis.

Hence, option A is correct.

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2 years ago

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