Students use a microscope to look for structures present in four different cells. The students
placed an X for each structure that was viewed for each cell on the table shown.

Which cell (or cells) were most likely a eukaryote? Choose the BEST ANSWER CHOICE
A. Cell X only
B. Cell X and Cell Y
C. Cell W and Cell Z
D. Cell X, Cell Y and Cell Z
Cell Z

Answer: Organism 4 is a eukaryotic cell because the organism is missing a cell wall.

Prokaryotic cells do not have membrane-bound organelles (so no nucleus, the DNA is free-floating), and have cell walls.

Eukaryotic cells have no cell wall, contain membrane-bound organelles (so they have a nucleus), and the DNA is kept inside the nucleus.

Answer:

52,396

Explanation:

that's what G o o g l e said

if abiotic or biotic factors change, the carrying capacity changes as well, natural disasters can destroy resources in an ecosystem. if resources are destroyed, the ecosystem will not be able to support a large population. this causes capacity to decrease.

Answer:

A stream does not respond and adjust to changes,

Explanation:

because it does not react to changes in environment.

A hypothesis outlines your expectations for the results of your investigation. It is a speculative, untested response to your research question. You might need to develop a number of hypotheses for some research projects that speak to various facets of your research issue.

A hypothesis should be founded on accepted ideas and body of information; it shouldn't just be a wild guess. Additionally, it must be testable so that you can use scientific research techniques to either confirm or disprove it (such as experiments, observations and statistical analysis of data). A relationship between two or more variables is proposed by a hypothesis. Anything the researcher modifies or controls is referred to as an independent variable. An observation or measurement made by the researcher is a dependent variable.

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Answer:

pH is a measure of how acidic/basic water is

Explanation:

Answer: A nucleus is basically the brain of the cell. It is in the center of the cell and surrounded by a membrane. The nucleus contains all the chromosomes and controls the cell's growth and reproduction of the cell.

Answer: One reason is the Co2 (Carbon Dioxide) in the air may cause the algae growth.

Explanation:

Carbon dioxide has been known to cause excessive blue or green algae.

Answer:

Fats, oils, and lipoproteins

Titration is a useful tool in the determination of amino acid side chains and the ionizable groups. There are two titratable groups for the unknown amino acid. These are α-COOH and α-NH₃⁺. The experimental pKa values for the groups are- pK₁ = 2.35 for α-COOH and pK₂ = 9.78 for α-NH₃⁺.

Amino acids are the organic compounds that contain both amino and carboxylic acid functional groups. Isoelectric point (pI) is the pH at which the net charge on an amino acid is zero. The isoelectric point of the given amino acid can be calculated by the formula:

pI = (pK1+pK2)/2 = (2.35+9.78)/2 = 6.065

Isoelectric point will be in the middle part of the curve in the buffer region. Buffer region is the section of curve between the initial point and the equivalence point.

The unknown acid would be glycine. The curve gas two dissociation steps- loss of H⁺ from the carboxyl group at low pKa value and gain of H⁺ by the amino group at high pKa value.

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Answer:

Organic compounds are compounds which contain carbon and hydrogen covalently bonded to each other and other elements, most notably oxygen, nitrogen, etc.

In this case, the first compound (ethanol, C₂H₅OH) is an organic compound.

Inorganic compounds are any compound which cannot be classified as an organic compound (meaning they lack carbon-hydrogen bonds).

In this case, the second molecule (carbon dioxide, CO₂) is an inorganic compound.

Elements are substances that cannot be broken down and contain a unique amount of protons. Sometimes, elements exist as diatoms in nature (two atoms of the same element).

In this case, the third substance (H₂) is an element.

Answer:

quote, "Cause of crown of thorns starfish outbreak

These outbreaks may be a result of overfishing of the crown-of-thorns starfish's primary predator, the giant triton or they may be a natural phenomenon. These starfish are known to be more successful at preying on large swaths of coral reefs when the corals are already stressed."

Crown-of-thorns Starfish - Oceanahttps://oceana.org

Explanation:

Answer:

Hydrolysis- adding water to split polymers

Dehydration Synthesis- removing water to join monomers together

Chlorophyll, a pigment found in chloroplasts, is what allows plants to prepare food through photosynthesis. There would not have been any plant life if there were no chloroplasts.

Chlorophyll, which is found in chloroplasts, traps light and aids in photosynthesis. Without chlorophyll, there would be no food, which would mean no life. We wouldn't have food if plants lacked chloroplasts since they couldn't use the sun's energy to stay alive. On the other hand, mammals would not have enough cellular energy and would not be able to exist without mitochondria. The process of photosynthesis is carried out by some plants that lack chloroplasts.

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Answer:

organic

Explanation:

These organic nutrients move up through the food chain. However, when death occurs, decomposition returns the nutrients to the earth.

Answer:

16S ribosomal RNA

Explanation:

Carl Woese used the 16S rRNA gene to discover the third major domain of life, the archaea.

Dormancy is the period during which the organism's metabolism decreases to conserve energy. Hibernation is a type of dormancy expressed by animals. This adaptation is Hibernation.

Dormancy is a period in the metabolism of different organisms, in which their growth, development, and physical activity get suspended for some time. The reduction in all metabolic activities allows the organism to conserve its energy.

Dormancy is closely related to environmental conditions and is considered an adaptation mechanism by which organisms respond to extreme conditions.

Hibernation is a type of dormancy, in which animals progressively decrease their metabolic rates, and body temperature is held a few degrees over the ambient temperature. During hibernation, all functions are reduced: cardiac rithm, respiration, renal function, etcetera.

Frogs, snakes, and lizards, among other cold-blooded animals, need to go through dormancy to survive extremely cold temperatures.

Notice that the dormancy term is commonly used in seeds when referring to the period before they germinate and the new plant emerges. This is another type of dormancy that relates especially to plants.

This type of adaptation is Hibernation (or animal Dormancy).

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Answer:

Option D is the correct answer

Explanation:

All organisms are controlled by genes.

Answer:

the difference is that a normal DNA sequence is stronger than a sickle cell DNA

Explanation:

We never see reptiles during extreme winter because they are unable to control body temperature and hibernation is a behavioral adaptation associated with to the unequivocal presence of changes in the behavior of an animal to adapt to extreme cold conditions.

Behavioral adaptation is a type of adaptation in which organism change their behavioral features to adapt to challenging environmental conditions such as extreme cold conditions in the case of animals that hibernate during the winter.

This type of adaptive mechanism (behavioral adaptation) is fundamental to maintaining the homeostatic equilibrium in adverse conditions.

In conclusion, we never see frogs, snakes and lizards during extreme winter because they are unable to control body temperature and hibernation is a type of adaptation called behavioral adaptation due to the presence of changes in the behavior of an animal to adapt to extreme cold conditions.

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Answer:

Physical properties are characteristics that describe matter. They include characteristics such as size, shape, color, and mass.

Explanation:

Hope this helped.!

Answer:

YOUR ANSWER IS HERE .

Water-soluble vitamins, Fat-soluble Vitamins, Trace minerals, and Macrominerals

Answer:

the bus they are riding also causes harm to nature and it will make most people very tierd

The by-product which are produced when cereal grains are being screened and cleaned are bran and endospermic tissue which are removed from the cereal grains.

Cereals are the staple food that are the major source of nutrition for the whole world. The bran of cereal is obtained from the process of milling as by-product and it contains various advantages such as they contain health promoting constituents such as minerals, vitamins, dietary fibers, polyphenols, as well as phytosterols.

Cereal grains are used for the food of humans and they are the basic source of food for humans and it has a great variety and majority is used directly. They are also great source of food for animals.

Therefore, The by-product which are produced when cereal grains are being screened and cleaned are bran and endospermic tissue which are removed from the cereal grains.

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Answer:

Na

Protons = 11

Electrons = ( protons = electrons )

= ( 11 = 11 )

= 11

Neutrons = ( Mass index - protons )

= ( 23 - 11 )

= 12

Explanation:

please make my answer as brainelist

Answer:

Bombay,capehenlopen,rheboth

Explanation:

population can increading according the paychart that shown in the top there.