DNA is a
A. lipid

B. nucleic acid

C. carbohydrate

D. protein

The process that must happen before meiosis can begin is that DNA doubles and produces sister chromatids (Option C).

Meiosis is a cell division process that generates four daughter cells having half of the DNA when compared to the parental cell.

Meiosis needs first the duplication of the genetic material by means of a synthesis stage (S phase).

In conclusion, the process that must happen before meiosis can begin is that DNA doubles and produces sister chromatids (Option C).

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Answer:

2 evolve

I hope your answer is correct

Answer:

word to my dead When a long-term environmental change occurs, certain individuals in a population will be better adapted for the new environment than others. These individuals will be more likely to survive and pass on their traits to their offspring. Over many generations, these favorable adaptations build up in a population. This may lead to speciation, which is the development of a new species.

Explanation:

mitochondria.

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Explanation:

This situation is called an incomplete dominance. A great example of this is when a plant with red flowers is paired with a plant with white flowers and the seeds give plants with pink flowers

Answer:

Stem cell benefits:

Can repair limbs such as Arms cut off etc.

Can Repair cells and keep people from ageing

Can reduce the effect on diseases

Test new drugs for safety and how effective they are

Make people live longer and healthier lives

Explanation:

Humans aren't aware on how to harvest stem cells effectively in a way they work on humans tot heir full potential but the reasons I listed above are only the tip of the iceberg when it comes to what we can do with these.

Answer: cell division does not stop after a baby is born bc if it were to stop then the baby would not grow

Answer:

C decomposer

Explanation:

decomposers get their energy from dead animals so there at the end of the tree, meaning they get there energy off the other tree groups.

Explanation:

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Answer:

Amino Acids

Explanation:

Answer:

B. Amino Acids

Explanation:

Amino Acids are the monomer (building block) of proteins.

Answer:

The early stages of embryo development in fish and humans look strikingly similar while insects develop very differently compared to both fish and humans,

Explanation:

It tells you that fish and humans have very similar embryo development (fetus development) while humans and insects develop very differently. Therefore, that supports the argument that humans are more like fish than insects.

Answer:

(Q1) Most people develop wisdom teeth by early adulthood. Wisdom teeth can cause pain or crowd out their other teeth, so many people have these teeth removed. Wisdom teeth in modern humans do not perform a crucial life function.

(Answer)They are vestigial structures that once performed an important function for human ancestors.

(Q2) Which statement is true?

(Answer) Imprints of leaves or footprints in sedimentary rock are fossils.

(Q3) Which statement about these fossils is supported by the evidence in the diagram?

(Answer) Homo erectus is the most recent ancestor to modern humans.

(Q4) Which of the following pieces of evidence would best support the argument that humans are more evolutionarily related to fish than they are to insects?

(Answer) The early stages of embryo development in fish and humans look strikingly similar while insects develop very differently compared to both fish and humans.

(Q5) Human embryos have tails, which become tail bones before birth. Tails also appear in fish, reptiles, amphibians, birds, and mammals. Humans also have hair and produce milk to nourish the young, which is unique to mammals. What does this indicate?

(Answer) a close evolutionary connection between humans and many other mammals

Explanation:

these are the correct answers for the 2022 school year.

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The body's cells are supplied with oxygen and nutrients through the heart, blood, and blood vessels. Blood transports carbon dioxide to the lungs (for exhale) and picks up oxygen through the network of arteries, veins, and capillaries.

Our bodies require a specific amount of oxygen to function effectively since oxygen is necessary for life. When you breathe (inhale), oxygen enters your body through your mouth or nose and travels through your lungs into your bloodstream.

Oxygen inhaled by the lungs is also carried by your blood. Your body's other cells receive oxygen and nutrition from your circulatory system, which then collects any waste products they produce, including carbon dioxide, and transports them to your kidneys and lungs for elimination.

Therefore, the blood collects food nutrients from the small intestine and transports them to every cell in the body.

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1) Solution

The sun warms the ocean surface and other surface water, causing liquid water to evaporate and ice to sublime. It turn directly from a solid to a gas. These sun driven processes move water into the atmosphere in the form of water vapor.

2) Solution

If we store the “Biosphere 2” in the dark for a few weeks, the water vapour will condense to form water.

Answer:

https://www.nationalgeographic.org/article/hydrologic-cycle/#:~:text=The%20water%20cycle%20consists%20of,evaporation%2C%20condensation%2C%20and%20precipitation.&text=Evaporation%20is%20the%20process%20of,evaporates%20and%20becomes%20water%20vapor.&text=Water%20vapor%20is%20also%20an%20important%20greenhouse%20gas.

Explanation:

Answer:

To produce natural oils for the skin

Explanation:

The normal function of sebaceous glands is to produce and secrete sebum, a group of complex oils including triglycerides and fatty acid breakdown products, wax esters, squalene, cholesterol esters and cholesterol.

Sebum lubricates the skin to protect against friction and makes it more impervious to moisture

Answer:

They shrink and pull away from the cell wall.The cell becomes flaccid. It is becoming plasmolyed. in a very concentrated solution, the cell undergoes full plasmolusis as the cells lose water

Answer:

They shrink and pull away from the cell wall. The cell becomes flaccid . It is becoming plasmolysed . In a very concentrated solution, the cell undergoes full plasmolysis as the cells lose more water.

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Answer:

Hey mate.....

Explanation:

This is ur answer.....

Hope it helps!

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Answer:

C. Both of these are correct.

Explanation:

Whales are the artiodactyls a group of hoofed mammals that includes deer, pigs, giraffes, camels and hippos.

Answer:

The cell is flexible and assumes a bell shape as it passes through extremely small blood vessels. It is covered with a membrane composed of lipids and proteins, lacks a nucleus, and contains hemoglobin—a red iron-rich protein that binds oxygen.

Answer:

The cell is flexible and takes the form of a bell through extremely small blood vessels. It is clothed in a fluid and protein-membrane, lacks a nucleus, and has hemoglobin—a rich red iron protein that binds oxygen.

Explanation:

The hemoglobin in red blood cells contains four iron-binding heme groups.

Heme groups of hemoglobin are binding on oxygen. Each molecule of hemoglobin can bind up to four molecules of oxygen.

Hemoglobin has a cooperative binding affinity to oxygen. The saturation of the molecule increases by oxygen. The connection of the initial molecule of oxygen affects the form of the other binding sites. For additional oxygen molecules, the binding becomes more favorable.

The four iron-binding hemo-groups are located in each hemoglobin molecule. Hemoglobin is known as oxygen-bound hemoglobin.

The reversible carbon dioxide is transformed into the carbonic acid reaction by the enzyme carbenoid anhydrase by the Red blood cells altering the blood PH.

Instead of being converted to carbonic acid, pH is controlled by carbon dioxide bindings to hemoglobin.

CO2: The enzyme found in RBCs catalyzing the reaction between carbonic anhydrase and carbonate dioxide and water.

Co-operative binding: When a first molecule is binding to a binding location, the same molecule is favored for the remainder of the binding locations by means of increased binding affinity.

Answer:

44- object 2

45- objects 1 and 4

Explanation:

44- object 2 push force is higher one the left then on the right

45- object 1 cancel eachoher because they have the same push force as eachoher and object 4 don't move at all because they don't have any push force on either side

Answer:

Plasma membrane or cytoplasm

Explanation:

Answer:

The scientific mrthod is a process used by scientists to find answers to a question or to solve a problem. No there isn't just one because there are several versions of the scientific method. Some versions have more steps, while others may have only a few. Scientists can add steps, take out steps, revise, or make models.

The scientific method is a systematic approach used by scientists to investigate and understand the natural world.

It consists of a series of steps that guide the process of conducting scientific research and acquiring knowledge.

While there is a general framework for the scientific method, it is important to note that there is no single, universally accepted version of it.

The exact steps and emphasis may vary depending on the field of study, the specific research question, and the nature of the scientific inquiry.

Different branches of science may have their own specialized methodologies and techniques.

For example, the methods used in social sciences or qualitative research can differ significantly from those used in the natural sciences.

Thus, this is all about scientific methods.

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Answer:

the plasma is go out from the capillaries, therefore the capillary is incomplete because in the capillaries the plasma is recused, So the plasma is create illustration

Answer:

Se estima que un total de 70.000 personas.

Answer:

Mammals are a group of vertebrate animals constituting the class Mammalia  and characterized by the presence of mammary glands which in females produce milk for feeding (nursing) their young, a neocortex (a region of the brain), fur or hair, and three middle ear bones. These characteristics distinguish them from reptiles and birds, from which they diverged in the Carboniferous, over 300 million years ago.

aardvarks.

bats.

elephants.

hamsters.

humans.

rabbits.

rhinoceroses.

whales.

Explanation:

Answer: a warm-blooded vertebrate animal of a class that is distinguished by the possession of hair or fur, the secretion of milk by females for the nourishment of the young, and (typically) the birth of live young. ( A animal with hair)

examples: dog, cat, platypus, wombat, kangaroo, tiger, lion, koala, squirrel, horse, giraffe, deer, etc...

Explanation: if the animal has fur/hair its a mammal

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Answer:

One key way by which species evolve over time in response to changes in environmental conditions is adaptation by natural selection acting over generations. Characteristics that aid in effective survival and reproduction in the new environment grow more prevalent, while those that do not become less prevalent.

Explanation:

it would be testies and ovaries

Answer:

Regions of ER that lack bound ribosomes are called smooth endoplasmic reticulum, or smooth ER.

Answer:

The ER regions lacking bonded ribosomes are referred to as the smooth or smooth endoplasmic reticulum.

Explanation:

The Endoplasmic reticulum is a membrane network within the cell that transmits proteins and other molecules. Proteins called ribosomes are assembled at organelles. The ribosomes that are assembled to the endoplasmic reticulum give it a rough look when proteins are intended for cell membrane or export from the cells. Smooth endoplasmic ribosomes are absent and help to synthesize and concentrate various cell-required substances.

Either a smooth or rough endoplasmic reticulum is capable of producing protein in general for the rest of the cell to function. The raw endoplasmic reticulum contains ribosomes, small, red organelles that make these proteins. Sometimes the proteins remain inside the endoplasmic reticulum when made incorrectly.

It is retained and the endoplasmic reticulum is engulfed because it appears to be stuck in a way that does not lead the protein where it is supposed to go. There is also the smooth endoplasmic reticulum on which these ribosomes are not contained. This smooth endoplasmic reticulum produces other materials that the cell needs. The endoplasmic reticulum is an organelle that actually produces proteins and substances that are necessary for the rest of the cell.