Explain how magnetic reversals provide evidence for sea-floor spreading.

Vines growing up a wall is an example of thigmotropism.

What is thigmotropism?

Why other options are incorrect?

Hence, vines shows movement it is an example of thigmotropism.

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The three elements that are common in all four organic molecules are carbon, hydrogen, and oxygen.

The three forms of almost all chemical structures needed for life, including carbohydrates, lipids, and proteins.

Thus, The three forms of almost all chemical structures needed for life, including carbohydrates, lipids, and proteins.

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Answer: The correct answer for the fill in the blank is- C) Neurotransmitters.

Neurotransmitters are the chemical messengers in the body that help in the transmission of signals from one neuron to another neuron across a gap called synapse ( such as neuromuscular junction).

These chemicals are released from synaptic vesicles that are present in the nerve endings and also from some glands (like adrenal gland and pituitary).

Example of neurotransmitters- Dopamine, acetylcholine, serotonin.

In the small intestine, the epithelial cells of the villi, which are covered with microvilli, absorb water-soluble nutrients such as sugars and amino acids into the bloodstream, while fatty acids and fat-soluble vitamins are absorbed by lacteals into the lymphatic system. These structures increase the surface area for efficient nutrient uptake.

The small intestine is where the majority of nutrient absorption occurs after the digestion of protein, fats, and carbohydrates. The inner surface of the small intestine contains many villi, which are finger-like projections, and the surface of these villi is covered with microvilli. This significantly increases the surface area for absorption, enhancing the efficiency of nutrient uptake. The epithelial cells lining the villi are responsible for transporting nutrients into the bloodstream and lymphatic system.

Each microvillus, as seen under a transmission electron microscope, is approximately 1 µm long and 0.1 µm in diameter. The core of these microvilli contains actin microfilaments, assisting in the absorption process. In the small intestine, water-soluble nutrients, such as simple sugars and amino acids, are absorbed directly into the capillary blood in the villi and then transported to the liver via the hepatic portal vein.

Conversely, fatty acids and fat-soluble vitamins are absorbed by lacteals, which are part of the lymphatic system within the villi. Root hair cells, while not covered in this question, have a similar absorptive role in plants, taking up water and nutrients from the soil.

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Answer: Option B

Explanation: Graduated cylinder, beaker, thermometer and hot plate

A graduated cylinder is a equipment which has readings for the measurement of the liquids or substance s that is kept inside it.

Beaker is an equipment which is used to boil water in this case by keeping on the hot plate.

The hot plate is used to heat the substances kept on it. Thermometer is used to measure the temperature of the substance.

These equipment are used to heat one liter water and make its temperature 85°C.

Answer

The phrases would be;

-A passive transport

-Movement of water molecules

-Through a semipermeable membrane

-From a higher concentration to a lower concentration

The genetic makeup of the daughter cells can include AA, Aa, aA, or aa with each possibility occurring with a 25% chance.

When an original cell has the genetic makeup AaSs, the genetic makeup of the daughter cells can vary. This is because during the formation of gametes (eggs or sperm), the alleles for each trait separate randomly, according to Mendel's principle of random segregation. Therefore, the possible genetic makeup of the daughter cells could include AA, Aa, aA (which is the same as Aa), or aa, with each possibility occurring with a 25% chance.

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Answer: Independent Assortment is the second law of inheritance.

Traits are passed from parents to offspring independently of one another.

Independent assortment is random and occurs during Metaphase 1 of meiosis.

These are two possible alignments for the chromosomes.

Since the alignments are random and not assigned, genetic variation occurs.

Explanation: On Ed

Independent assortment occurs during meiosis when homologous chromosomes line up randomly, allowing for genetic variation. Recombination through crossover events further contributes to independent assortment. This ensures that alleles on a given chromosome are not always inherited together, promoting genetic diversity.

Independent assortment occurs during meiosis when homologous chromosomes line up in random orientations during metaphase I. Each gamete can contain any combination of paternal and maternal chromosomes, resulting in genetic variation. Recombination through crossover events also contributes to independent assortment by exchanging genetic material on homologous chromosomes. This ensures that alleles on a given chromosome are not always inherited together, allowing for more genetic diversity.

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The answer is A, i took the course.

A. Cell to cell identification

Digestion occurs inside organs that contain various enzymes. These enzymes, found in organs like the stomach and intestines, help break down food into nutrients. The enzymes lactase, maltase, and sucrase in the small intestines, for example, assist in the digestion of sugars.

Digestion takes place inside structures called organs containing various enzymes. So, the full sentence should read: Digestion takes place inside organs containing enzymes. The digestive system, for instance, is made up of organs such as the stomach and intestines where enzymes break down food into nutrients. In the stomach, pepsin helps digest proteins, while in the small intestines, enzymes like lactase, maltase, and sucrase aid in the digestion of sugars.

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Answer:

Two themes that connect all the information in biology are structure and function.

Explanation:

In word Biology, bio means life and logy means study. The study of life is Biology. The study involves structure and function features of living things. The structure and function tells us about the interaction of living organisms with the environment. For example, the large organisms have small surface area and small organisms have large surface area. This helps in heat lost or conservation.

The function that is NOT assigned to blood is carrying oxygen from the cells to the lungs. The actual task of blood includes transporting oxygen from the lungs to the cells, nutrients from the digestive system to the cells, carrying waste to the kidneys, and transporting cells, molecules to fight infections.

The function of blood in the body is not to carry oxygen from the cells to the lungs. Instead, one of the primary roles of blood is its responsibility to transport oxygen from the lungs to the various cells throughout the body. In addition to carrying oxygen, our blood carries numerous other essential substances.

These include nutrients (which are transported from the digestive system to other areas of the body), waste products

(which are moved to the kidneys for removal), and cells, molecules, and antibodies that help our bodies to fight off infection and heal from injuries.

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Answer;

D. controlled

An experiment in which only one variable is changed is a controlled experiment.

Explanation;

-A control experiment is an experiment where the researcher only changes one variable at a time in order to isolate the results.

In a controlled experiment, most conditions are constrained so that they do not change. One or two other conditions are then changed and measured by the experimenter. These are known as the independent variables.

For example; An experiment where all subjects involved in the experiment are treated exactly the same except for one deviation.

An experiment that is only one variable that has changed is a controlled variable experiment.

the independent/controlled variable

is a variable that can be changed according to the purpose of the experiment

The development of chemistry begins with experiments that consist of chemical stages/processes. This method is a form of the scientific method that is commonly used by scientists in carrying out experiments.

Several experiments, trials, and errors will be carried out to test the hypothesis until the expected results are in the predetermined problem at the outset.

Variables, which can be determined in 2:

, which is a variable that can be changed according to the purpose of the experiment

We can control independent variables according to the results of the experiments to find conditions that have the most optimal results so that the goals of the problems that have been set will be achieved.

The continuous investigation is so that the control variables are not out of the problem boundary

So the right choice is a controlled variable

the scientific method steps and process

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the Scientific Method

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scientists use the scientific method

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Keywords: scientific method, fixed variable, an independent variable

Answer:

Extinct.

Explanation:

The IUCN red list classifies the organism as endangered , extinct, threatened and vulnerable organism. The organism are classified on the basis of their number and presence on the particular area.

Extinct species is the species that are no longer present on the earth. The extinct species has been eliminated due to the unfavorable environmental condition and due to human activities. No single organism is present of the extinct species.

Thus, the correct answer is option (3).

Answer:

The MOST accurate way to determine the evolutionary relationship between two animals is through the examination of DNA.

Explanation:

    The diversity of life forms on Earth originated from mutations selected by greater reproductive capacity over time. From the DNA of the original cell came the infinity of life forms with which we share the earth through the mechanisms of mutation and recombination.

    Evolutionary history shows us how all living beings are more or less related to each other. Some percentages of similarity between the sequences of the human genome and other species are striking: we have 95% in common with chimpanzees, 89% with mice; 45% with fruit flies and up to 9% with Escherichia coli, the bacteria in our intestines. This similarity is an indication of the common origin of all living beings and enables the analysis of divergences from one species to another.

Headwaters is the source of a stream.

A stream or river's headwaters are its starting point. They are situated at the farthest point from the water body's outlet or point of confluence. These mountainous and often forested regions are where two thirds of California's surface water supply is produced.

Although the physical, biological, and chemical characteristics of a river's headwaters can have a significant impact on its downstream flows, the size and strength of a river's flow are not always controlled by its origin.

All along the length of the body of water, there are creatures, sediments, minerals, pollutants, and other compounds that have either been added by runoff or are naturally present in these river sources.

Therefore, Headwaters is the source of a stream.

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The components of blood that protect us from invading foreign materials are White Blood Cells, certain proteins in the plasma such as antibodies, antigens, and platelets.

The component of blood that protects us from invading foreign material is primarily the White Blood Cells (WBCs), or leukocytes, as part of the immune response. WBCs identify and target invading bacteria, viruses, and other foreign organisms. Not only do they combat foreign invaders, but they also recycle waste components such as old Red Blood Cells.

In addition to WBCs, certain proteins in the plasma, such as antibodies and cytokines, defend the body against infection and other threats. For instance, when damage occurs to blood vessels resulting in bleeding, blood platelets and coagulation factors present in the plasma interact to seal the ruptured areas, preventing further blood loss and protecting the body.

Another important component, called antigens, triggers an immune response when foreign antigens appear in our blood. Proteins known as antibodies, produced by certain B lymphocytes called plasma cells, attach to these foreign antigens to neutralize them.

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Answer: hazardous waste container

Explanation:

A hazardous waste container is the container where hazardous waste which have been used in clinical trials, hospital use, nuclear power plants, hazardous chemicals from the laboratory can be stored, treated and transported.

Biohazardous waste, is the infectious waste which can be grown over the biological material like tissues, body organs, blood, urine, blood transfusion tube and others.

The paper towel will contain blood which is subjected to the growth of the pathogens and can cause huge infection hence, it is the example of material which should be disposed off in the hazardous waste container.