When researchers use a molecular clock what are they measuring?

Answers

Answer 1

Answer:

They are measuring the time that two species have been evolving independently.

A molecular clock is a method that is used by scientists to estimate the time that two species evolve separately using the knowledge of the DNA differences. To carry out this method, scientists use (i) an estimate of the number of genetic mutations that occur between two closely related species and (ii) the average genetic mutation rate to estimate the time in prehistory when the two species split.

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A plant leaf shows veins arising from a central thick vein to form a complicated network. Which type of venation does this plant exhibit? A. ParallelB. CrisscrossC. Reticulated

Information about traits is stored in the cell nucleus in a molecule called ______.

Answers

Answer:

Information about trait is stored in the DNA

Explanation:

What is DNA?

The acronym DNA stands for (Deoxy Ribonucleic Acid) . The genetic code which determines the behavioral pattern of an organism . Each nucleotide contains a sugar and a phosphate molecule, which make up the 'backbone' of DNA.

DNA because it is passed from a parent to a child during reproduction. it is made up of genes

The structures found within the blood perform important functions throughout the body. Which of the following is not a function of blood?a. To regulate filtration.
c. To transport nutrients.
b. To regulate body temperature.
d. To fight infection.

Answers

I believe the most likely answer is that blood does not regulate filtration. yes, it does transport nutrients throughout the body, and it does help regulate body temperature. The blood also has white blood cells, which help to fight off foreign or not known cells and bacteria, and help to prevent infection. So, therefore, the most likely answer is A, To regulate filtration, because the blood does not regulate filtration, although it may help in the process at times.

You ask a cooperative 3 y.o. girl to touch the wings of the Titmus fly. She recoils and refuses. You can assume most likely: A) she is tired and cranky B) she has impaired mental ability C) she has at least gross fusion D) she has an intermittent deviation

Answers

Answer: C. She had at least gross fusion

Explanation:

The girl's reaction to the Titmus Fly Test likely indicates she has at least gross fusion, meaning she can visually combine the images from both eyes into a single, three-dimensional image.

The question relates to the Titmus Fly Test, a common vision test often used for children. It's designed to detect binocular vision issues, including problems with depth perception. If the 3-year-old child is hesitant or reluctant to physically interact with the perceived object (the wings of the fly), this might suggest the presence of gross fusion.

In other words, she can visually combine the images from both eyes into a single, three-dimensional image, therefore perceiving depth and distance correctly. This healthy visual skill may lead to hesitation in attempting to touch a false 3D image because her depth perception is telling her it's impossible or awkward to do so. Thus, the correct answer is C) she has at least gross fusion.

Learn more about Titmus Fly Test here:

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According to MyPlate, how many cups of fat free or low fat milk, or their equivalent, should be consumed daily for all calorie levels?

Answers

Options: A. 2. B. 3. C. 1 D.4

Answer:B.3

Explanation:Myplate is a program of the United States of America, it aims to design standard nutrition required for children,it aims to ensure that the children live a healthy Lifestyle with reduced incidence of diseases.

MyPlate is managed and published by the USDA(United States Department of Agriculture) Center for Nutrition Policy and Promotion. It is a circle of very colourful and attractive food/ nutrition designs which make it more attractive and appealing.

Reduce, reuse, recycle! These buzz words fuel the green movement that keeps tabs on Earths environmental health. We can help by using _________ batteries, an alternative that keeps toxic heavy metals out of landfills and earths water system as well as being a good idea economically.Alkaline

Disposable

Primary

Rechargeable

Answers

D. Rechargeable batteries

Use your understanding of the phosphorus cycle to answer the questions provided.Phosphorus cycles between living things and the ______. ?

Answers

Phosphorus cycles between living things and the SOIL

Explanation:

Phosphorus flows in a cycle within rocks, water, soil and sediments, and organisms. The phosphorus cycle is the biogeochemical cycle that represents the action of phosphorus within the lithosphere, hydrosphere, and biosphere. Phosphorus is an essential element for all sorts of life. As phosphate (PO4), it delivers up an essential part of the structural core that holds DNA and RNA mutually.

Phosphorus cycles between living things and the environment, particularly the soil. This is the case with many other substances as well such as carbon. The cycling occurs due to the action of organisms which uptake and release phosphorus into the soil. Phosphorus exists in animals in many forms, particularly in the ATP molecule. When the animal dies, its remains are decomposed and the constituent ions are released into the soil, after which they are taken up by plants. Animals consuming these plants gain the phosphorus again, and the cycle continues.

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Organisms are constantly interacting with their environment. Sometimes this interaction has a positive effect on the environment, other times a negative impact. Beetles in the forest infest and eat limbs of trees that have fallen to the forest floor. The best way to describe the beetles impact is to say that A) they are having a neutral impact on the environment by acting as decomposers. B) they are having a positive impact on the environment by acting as decomposers. C) they are having a negative impact on the environment by acting as decomposers. D) they are having a predatory impact on the environment by acting as decomposers.