what structure help to keep the stem's shape and up right position?​

Answer:

crossing-over and independent assortment

Explanation:

Answer:

D. All of the energy in a food chain originates from the sun.​

Explanation:

The Sun is the major source of energy for organisms and the ecosystems of which they are a part. Producers such as plants, algae, and cyanobacteria use the energy from sunlight to make organic matter from carbon dioxide and water. This establishes the beginning of energy flow through almost all food webs.

Answer:

Ecosystem.

Explanation:

Archaea play an important role in ecosystems with organisms that derive or produce energy from oxidation of methane. Many of Archaea are bacteria which are often a major source of methane in such environments and they can play a role as primary producers. Archaea is important for scientists because it has unique ecological roles and can also generate energy differently i.e. responsible for producing biological methane which no eukaryotes or bacteria can do that.

Based on the data in the graph, pesticide use is higher in wheat farming since it is more commonly employed in farming and plants than in the cattle business.

In order to produce food and commodities that people can use and enjoy, agriculture broadly refers to all activities involved in cultivating crops and rearing animals. One aspect of agriculture, which also covers plant science and entails cultivating the soil and rearing livestock, is farming. Food overproduction, although ensuring food security, also disturbs global markets and seriously harms the environment by depleting soil and water resources.

These are industrial farming and subsistence farming. This kind of farming is done to provide for the farmer's family.

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The two objects on the slide that the students noticed are cheek cells and bacteria.

Cheek cells are the cells that line the inside of your cheek. They  shed constantly and are also replaced by new cells.

Bacteria are microscopic organisms that live on and in our bodies. There are many different types of bacteria, and they can be found in all parts of our bodies, including our mouths.

Bacteria are not all bad. Some of them are important for our health because they help to break down food and they produce vitamins that we need.

The student was able to see the cheek cells and bacteria on the slide because they were stained with a dye called methylene blue.

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The liquid that causes heartburn is stomach acid.

Answer:

It is important to remember that Creation helps maintain Homeostasis in your body by excreting wastes from your body, which eliminates harmful toxins living in your body, which would increase your chances of getting a disease. It is through the lungs that carbon dioxide and some water are removed from the body when you exhale.

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Cytochrome c (Cyt c) is a protein that surrounds the mitochondrial inner membrane. The location of Cyt c is in the intermembrane or intercristae part of mitochondria. It is one of many factors that are important for apoptosis.

There’s a stimulus to induce outer membrane apoptosis, then Cyt c mobilizes from CL, and after that Cyt c is released to the cytosol. Cyt c allows apoptosis-protease activating factor 1 for caspase-3 and caspase-9 to be matured.

Basically, Cyt c activates caspase. In this case, Cyt c is a stimulus. After that outer membrane will break to facilitate the mobilization of Cyt c to the cytosol. This is a process of a stimulus, protease, and also proteins.

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The question was incomplete. This is a general answer.

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Answer: B

Explanation: Trust

Answer:

Option A

Explanation:

Answer:

Pretty sure it's A- form the structure of the face and head.

mitosis refers to the parts of the original nucleus into two nuclei. On the other hand, meiosis refers to each having half chromosomes of the original cell.

in mitosis, there is the maintenance of chromosomes takes place while meiosis leads to a reduction in the no. of chromosomes. There are no variations in mitosis and variants occur in meiosis.

hence at last we can say that the above are the major difference between mitosis and meiosis. All of the explained differences will clearly lead to identifying them in particular. mitosis and meiosis plays a vital role in formation of gametes.

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Sea lion eat using whiskers.

Therefore, option D. is correct.

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The fossil of an organism with a sprawling gait and middle ear bones, found in a 250-million-year-old rock layer.

historically, non-mammalian synapsids were believed to have advanced from reptiles, and consequently defined as mammal-like reptiles in classical systematics, and primitive synapsids were also known as pelycosaurs, or pelycosaur-grade synapsids.

Mammals belong to a larger institution of animals referred to as synapsids. these are vertebrate animals that produce amniotic eggs and have a single hole, or temportal fenestra, in the back of their eye socket. The sister organization to the synapsids are the sauropsids, all cutting-edge 'reptiles' (which includes birds) and their fossil family.

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The fossil that provided the strongest evidence for the discovery of a transitional species between early non-mammalian synapsids and mammals is: the fossil of an organism having a sprawling gait and middle ear bones, that was found in a rock layer that was 250-million-year-old.

Synapsids were the earliest known reptiles that were present during the Carboniferous period. The term synapsid refers to the fused arch. They evolved from the basal amniotes along with the Sauropsids.

Gait refers to the way of movement of any animal. Various animals have different types of gait or locomotion. These can be crawling, flying, walking, creeping, slithering or swimming.

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Answer:

the excretory system

Answer:

So the independent is what you keep the same. You must keep the experament controlled because if you have more than one variable there is the chance that you will not know what factor changed the experament.

Ex: If you are trying to find out the height of a plant based on what you add to the soil and you give it plant A water, plant B soda, and plant C milk, AND you stick plant A and B in the shade and stick plant C in the sun you will never know what affected the hight of the plant due to the different variables.

Controlled variable can show the accuracy of the result of the experiment, it prevent bias of the experiment.

Variables are the measurable factor present in an experiment which can be manipulated and controlled in research like person's eye color, its value can which change from brown to blue depend on different factors.

An independent variable is a characteristic variable which can not be affected by other factor, Age is an example of an independent variable.

A dependent variable depend on other variable and it can be changed by  independent variable like grade on an exam is a dependent variable mainly depend on Independent variables.

Control variable can be defined as the constant variable which remain constant show an effect on other variables and it is used to prevent bias in an experiment.

The height of the plant based on what you add to the soil and give it to plant A water, plant B soda, and plant C milk, and stick plant A and B in the shade and stick plant C in the sun  never know what affected the Hight of the plant due to the different variables.

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Answer:

2, 4, and 5 refers to scientific revolution while on the other hand, the remaining statements shows scientific observation.

Explanation:

Cloning has the potential to  significantly benefit a great many  people, so it should not be  considered immoral or risky is refers as scientific observation.

A scientist thinks that he might  find serious inconsistencies in the  fossil record if he conducts an  excavation in a new location is refers scientific explanation because explanation is needed for it.

The rocks present in western Africa  and eastern South America formed  at the same place and at the  same time is scientific observation because the scientists takes the data.

Even if modern organisms are  found in ancient portions of the  fossil record, this wouldn't challenge the theory of evolution in any way is refers to scientific explanation.

The cloning of organisms is an  exciting area of study, and more  resources should be be devoted  to it so it is refers as scientific explanation.

The age, type, and composition of  ancient rocks in western Africa are  nearly identical to the age, type,  and composition of rocks in  eastern South America is scientific observation which is taken by the scientist through research.

The common bile duct pierces the medial wall of the duodenum along with the pancreatic duct through the ampulla of Vater.

he ampulla of Vater is the point at which the common bile duct and pancreatic duct enter the duodenum, and it is located at the major duodenal papilla. The common bile duct follows a groove on the posterior surface of the pancreatic head, known as the superior pancreaticoduodenal groove, before joining the pancreatic duct at the ampulla of Vater.The pancreatic duct, also known as the duct of Wirsung, is a tube-like structure that carries enzymes and bicarbonate from the pancreas to the duodenum, which is the first part of the small intestine. It originates in the tail of the pancreas and runs through the pancreas, joining with the common bile duct at the ampulla of Vater, which is located at the major duodenal papilla. The bicarbonate neutralizes stomach acid, and the enzymes are important for the breakdown of carbohydrates, proteins, and lipids in the small intestine. The duct is lined by cells that secrete a thin layer of bicarbonate-rich fluid, which protects the pancreas and the duct from the acidic secretions of the stomach. Pancreatic duct is essential for the normal function of the pancreas and the digestive system.

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Answer:

I think answer is liquid vesicles concentration was 0.3 mg/ ml

Answer: because that is not how were made.

Explanation:

Answer:

See explanations below.

Explanation:

growth of seed into seedling

- chemical (bio-chemical) change.  The seed will never be there in its form again, the properties of the growth are different from the seed.

wax melting

- physical change.  When heat is withdrawn, it reverts to the same solid wax, with only different physical properties (such as shape or texture).

making caramel

- chemical change. it is almost like burning part of the sugar content.  The browning cannot be changed back to white sugar, smells and tastes different.  However, on part of the sugar has undergone chemical change.

Tarnishing of silver

- chemical change.  The brown substance is silver sulphide due to reaction of silver with sulphur dioxide present in minute quantities in the air.  The silver can be made to shine again by REMOVING the silver sulphide, not by reversing the change.

grinding wheat to make flour.

- physical change.  The compound is still flour that contains mainly starch.  The chemical properties are the same as wheat, in providing nutrients, etc.

Adding copper and gold to make jewelry.

- physical change.  The two metals together make an allow, which is basically a mixture.  Both physical and chemical properties of the individual metals remain.  

The trend that is evident is: Initially, there seems to be support for Mel's hypothesis, but the gold data is not consistent with the predicted trend.

Option C is correct.

The data for zinc, nickel, copper, and silver shows that as the density increases, the melting point tends to increase.

From the data we can see , the data for gold does not follow this trend, as its density is lower than silver but its melting point is higher.

Therefore, while there is some initial support for Mel's hypothesis, the inconsistency with gold indicates  that the relationship between density and melting point is not solely determined by density.

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The nitrogen that is released into the Gulf of Mexico through agricultural runoff is used by the phytoplankton and algae to build biological molecules.

A biomolecule or biological molecule is a loosely used term for molecules present in organisms that are essential to one or more typically biological processes, such as cell division, morphogenesis, or development.

Biomolecules are vital for life as it aids organisms to grow, sustain, and reproduce. They are involved in building organisms from single cells to complex living beings like humans, by interacting with each other.

There are four major classes of biological macromolecules (carbohydrates, lipids, proteins, and nucleic acids); each is an important cell component and performs a wide array of functions.

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The most likely outcome of a mutation found in the egg cell of a human is;
"It will be passed from parent to offspring."

Because the egg cell provides all of the genetic material to the embryo, if a mutation occurs in the egg cell, it will be present in all cells of the progeny.

Depending on the specifics of the mutation and the genes involved, the offspring's development and function may be impacted. If mutations take place in the germ cells that develop into eggs or sperm, they can also be passed on to the next generation.

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Answer:

the desert

Explanation:

Carbohydrates are used for short term energy. It also stores energy.

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Function of carbohydrates

Carbohydrates provide fuel for the central nervous system and energy for working muscles. They also prevent protein from being used as an energy source and enable fat metabolism, according to Iowa State University. Also, "carbohydrates are important for brain function," Smathers said.

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Lipase catalyzes the reaction to break fat molecules down into fatty acids and glycerol. Lipase would best be described as an enzyme. The correct option is a.

Lipase is an enzyme that breaks fat molecules into fatty acids. Lipase is an enzyme that can be identified by 'ase' word at every end of the enzyme ase word is added.

Enzymes are biocatalyst that catalyzes biological reactions and increase the rate of reaction. They are various enzymes present in our body that cut down the molecules into simpler forms. Lipase enzyme is produced in the mouth, pancreas, and stomach.

Lipase is a type of digestive enzyme and is also called digestive juice. It digests many fats inside the body.

Therefore, the option is a) An enzyme.

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Answer:

true

Explanation: