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Mrac [35]
2 years ago
6

bservations of organisms include descriptions of why the organism has certain traits. descriptions of the number, size, and arra

ngement of parts of the organism. conclusions made about the characteristics of an organism. conclusions made based on an organism’s DNA.
Biology
1 answer:
Helen [10]2 years ago
6 0

Answer:

Scientists first discovered chromosomes in the nineteenth century, when they were gazing at cells through light microscopes. But how did they figure out what chromosomes do? And how did they link chromosomes — and the specific genes within them — to the concept of inheritance? After a long period of observational studies through microscopes, several experiments with fruit flies provided the first evidence.

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You are approaching the end of the semester and have decided to not go shopping during finals to reduce having to deal with left
Montano1993 [528]

Answer:

You will be okay after eating a high-calorie meal as long as it is not eaten often. However, eating more calories than calories that can be burned can cause weight gain.

6 0
2 years ago
Sometimes the microvilli on the epithelial cells lining the proximal tubule are destroyed. What effect would this have?
Aleonysh [2.5K]

Answer:

Reduced reabsorption of salts and nutrients from the proximal tubule.

Explanation:

The proximal convoluted tubules are the site for reabsorption of the largest amount of solute and water from the filtered fluid. It reabsorbs 65% of water, electrolytes such as Na+ and K+, almost 100% of the filtered glucose and amino acids and other electrolytes such as Ca2+, Mg2+, etc.

The simple cuboidal epithelial cells of the proximal convoluted tubule have a prominent brush border of microvilli on their apical surface. These microvilli serve to increase the surface area for reabsorption and secretion. Destruction of these microvilli would reduce the reabsorption of the above-mentioned salts and nutrients from proximal convoluted tubules.

7 0
2 years ago
Yanni made a chart to compare the strong and weak forces. Which best describes Yanni’s error? Only the weak force is active in t
cluponka [151]

Answer: Option (d) is the correct answer.

Explanation:

Nucleus of an atom consists of protons and neutrons. Protons are positively charged and neutrons have no charge. So, due to the like charges of protons there occurs electrostatic force of repulsion inside the nucleus of the atom.

But due to similar number of neutrons and protons a force that is able to bind both of them together is known as strong nuclear binding energy.

This force is strong enough that it is able to overcome electrostatic force of repulsion. But when there is great difference in the number of protons and neutrons then binding force is not strong enough.

Hence, the atom becomes unstable and undergoes radioactive decay. So, this means weak forces are responsible for radioactive decay.

Thus, we can conclude that the statement which best describes Yanni’s error is that the strong force is responsible for radioactive decay.

8 0
3 years ago
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Groundwater deposits are under threat of depletion and pollution. What are three appropriate solutions for preserving groundwate
Ugo [173]
Groundwater is the body of water derived from percolation, contained within the soil, sub-soil and underlying rocks above an impermeable layer. The top layer of groundwater is known as the water table and it marks the permanent zone of saturation. Three appropriate ways for preserving groundwater are:

- Recycling groundwater for use
-Regulating the amount of groundwater used to water neighbourhood lawns
-Monitoring the chemicals used in fossil fuel extraction
4 0
2 years ago
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The hypothesis that all modern humans descended from an african lineage ____. has been conclusively proven to be correct is supp
Juliette [100K]
The hypothesis that all modern humans descended from an African lineage is supported by the mitochondrial DNA evidence. The Eve hypothesis is the hypothesis that is based on the study of mirtochodrial DNA; that modern humans have a common female ancestor who lived in Africa around 200,000 years ago. It is also called African Eve hypothesis. 
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3 years ago
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