ASAP PLEASE HELP ASAP

1.Alex poured some pond water into three beakers. She then put waterweed into each
beaker. She put the beakers in different places.

i) In which beaker did the waterweed grow best? Give the correct letter.

________

ii) The waterweed in the box changed from dark green to pale yellow. Why did this happen?

2.In the school pond there were lots of water lilies with large leaves covering the surface. There were not many plants growing below the surface. Suggest a reason
for this.

3.In another experiment, Alex put similar pieces of waterweed into two more beakers of pond water. She added fertiliser to one of them. She kept them both by a window.

i) Alex added fertiliser to beaker E. Suggest the results of this experiment.
ii) What do fertilisers contain to help plants grow? Tick the correct box.

In a certain organism with a diploid number of 10, the number of chromosomes present in each cell at different stages of mitosis would be as follows:

Interphase: During interphase, which is the resting phase of the cell cycle, the chromosomes are not condensed and appear as long, thin threads. The number of chromosomes remains the same as the diploid number, which is 10 in this case.

Prophase: Prophase is the stage where chromosomes condense and become visible. Each chromosome consists of two sister chromatids held together by a centromere. Therefore, the number of visible individual chromosomes would be twice the diploid number. So, in this case, there would be 20 chromosomes present in each cell during prophase.

Metaphase: In metaphase, the chromosomes align along the equatorial plane of the cell. Again, each chromosome consists of two sister chromatids. Therefore, the number of visible individual chromosomes would still be twice the diploid number. So, there would be 20 chromosomes present in each cell during metaphase.

Anaphase: Anaphase is the stage where the sister chromatids separate and move towards opposite poles of the cell. Each chromatid is considered a separate chromosome. So, the number of chromosomes would be twice the diploid number. Thus, there would be 20 chromosomes present in each cell during anaphase.

Telophase: Telophase is the final stage of mitosis where the separated chromosomes reach the poles of the cell and decondense. Each chromosome still consists of two sister chromatids. Therefore, the number of visible individual chromosomes would still be twice the diploid number. So, there would be 20 chromosomes present in each cell during telophase. It's important to note that these numbers represent the visible individual chromosomes and not the number of chromatids or DNA molecules.

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Answer: The option that is NOT true is:

C. Its primary fuel is fat.

Explanation:

Anaerobic metabolism does not primarily rely on fat as its fuel source.

The correct answer is Option (c)

Option (c) Its primary fuel is fat, which is NOT true of anaerobic metabolism.

Let's delve into the topic by breaking down the words anaerobic, which gives us an-aerobic.

Aerobic refers to anything, which involves the presence of air, or more specifically oxygen. Thus any aerobic activity would involve the presence and usage of oxygen for its necessary functions.

Anaerobic would thus mean any activity which doesn't require the presence of oxygen.

Anaerobic metabolism defines the process by which cells, without the presence of oxygen, produce energy for their work. When the supply of oxygen is limited, cells opt for this alternative pathway to produce energy to keep themselves running.

Here, the breakdown of glucose occurs even in limited oxygen to give us ATPs (Adenosine Triphosphate), the energy currency of the cell.

Coming back to the question, we go through the options one by one.

During high-intensity activities like sprinting or heavy exercise, your lungs don't work fast enough to provide the body with enough air. Thus the glucose gets decomposed without the presence of oxygen to give the body the energy it needs through anaerobic respiration.

Thus, option A is correct.

Anaerobic respiration or metabolism occurs in the fluid part of the cell known as the cytosol, due to the availability of a suitable environment for chemical reactions.

Thus option B is correct.

Anaerobic metabolism doesn't require oxygen, as discussed before.

Thus option D is correct.

But, the primary source of fuel for running anaerobic chemical reactions is not fat, but glucose which breaks down to give ATP.

Thus, option C is incorrect.

Thus, the answer to the question is option C.

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The process of converting sensory input to a change in membrane potential in the receptor is called sensory transduction.

Sensory transduction is the process by which sensory stimuli are transformed into electrical signals that can be processed by the nervous system. This process occurs in sensory receptors, which are specialized cells that detect changes in the environment and convert them into electrical signals.

The sensory receptor membrane contains ion channels that open or close in response to specific stimuli, such as light, sound, or pressure. This causes a change in the membrane potential of the receptor cell, which in turn triggers the release of neurotransmitters that signal the nervous system.

Sensory transduction is a fundamental process that underlies all sensory perception and is essential for our ability to sense and respond to the world around us.

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Nematocysts are stinging cells that can be found in the phylum Cnidaria. These specialized cells can capture prey and deter predators. The hydra and sea anemone are two cnidarian species that possess nematocysts. While the nematocysts of hydra and sea anemone share similarities, they have some key differences.Nematocysts of a hydraHydra is a freshwater cnidarian that has a tube-like body and is a simple polyp.

Hydra has three types of nematocysts: spirocysts, microbasic mastigophores, and atrichous isorhizas. Each of these nematocysts have specific functions. For example, spirocysts help in wrapping the prey while microbasic mastigophores help in penetrating the prey's skin.Nematocysts of a sea anemoneSea anemones are marine cnidarians that have a sessile polyp body. They have a different type of nematocyst, acrorhagi. Acrorhagi are elongated nematocysts present on the oral disc and tentacles of sea anemones.

These nematocysts contain toxic threads that can be used as a weapon to attack other cnidarians. In addition to acrorhagi, sea anemones also possess spirocysts, microbasic mastigophores, and atrichous isorhizas, like hydra.To summarize, the nematocysts of hydra and those of sea anemone have a similar structure, but sea anemones also possess elongated nematocysts called acrorhagi that can be used as a weapon.

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Answer: (A) Monosaccharide

Explanation: You can tell if a sugar is a monosaccharide because it will have certain chemical changes with Benedict’s.

Therefore, the estimated lake trout population size in the 250-hectare lake is closest to 800. Answer: d) 800

Based on the capture-recapture estimate, we can estimate the population size of lake trout in the 250-hectare lake. In this method, a sample of individuals is marked and released back into the population, and then another sample is taken later to see how many marked individuals are captured.
In this case, 200 lake trout were netted and marked with a fin clip, and then returned to the lake. The following week, 200 lake trout were caught again, and out of these, 50 had fin clips.
To estimate the population size, we can use the formula:
Population size = (Number of individuals in first sample * Number of individuals in second sample) / Number of marked individuals in the second sample.
Plugging in the values, we get:
Population size = (200 * 200) / 50 = 800
Please note that this method assumes that the marked individuals have mixed back into the population and that the two samples are representative of the entire population. It is an estimation and may not give an exact population count.

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Male pattern baldness has a genetic switch that turns on in response to male hormones.

The correct option is option D.

Male pattern baldness is basically the most common type of hair loss which is observed in men. Male pattern baldness is basically related to the genes as well as the male sex hormones. Baldness usually follows a certain pattern of receding hairline as well as the hair thinning on the crown.

Male pattern baldness is found to be associated with male sex hormones which are known as androgens. The androgens perform many functions, one of which is regulating hair growth. Every hair strand present on our head has a growth cycle. In the case of male pattern baldness, this growth cycle of the hair gets weakened and the hair follicle shrinks and ends up producing shorter and finer strands of hair. This growth cycle for each hair eventually ends and no new hair then grows in its place.

--The given question is incomplete, the complete question is

"Male pattern baldness has a genetic switch that turns on in response to ________.

A) age

B) size

C) weight

D) male hormones"--

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Answer:

A. Carries urine to bladder

B. Excretes urine out of body

C. Stores urine temporarliy

D.Produces urine

Explanation: Hope this helps!!

The identification of the functions of the labeled parts is as follows:

A. Carries urine to bladder

B. Excretes urine out of body

C. Stores urine temporarliy

D.Produces urine

In this way, the identification could be made

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The extension of the forebrain that receives odor input from the nose is the olfactory bulb. This structure is crucial for processing and perceiving smells.

A detailed explanation is that the olfactory bulb is a structure located in the front part of the brain, just above the nasal cavity. It receives information about smells from the olfactory receptor neurons in the nose and processes this information before sending it to other parts of the brain for further processing and interpretation. The olfactory bulb is responsible for helping us detect and identify different smells and plays an important role in our sense of taste and overall sensory experience.

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Answer:Plants absorb sunlight and turn that energy into food once put together the process is known as photosynthesis.

Explanation:

Green plants and other organisms use sunlight put together with carbon dioxide and water to make food. Plant photosynthesis produces oxygen from chlorophyll.

Photosynthesis is a process that plants and other organisms utilize to transform the energy from light into chemical energy. This chemical energy can then be used to fuel the activities of the organism through a process called cellular respiration.

 Sunlight, water, and oxygen are necessary components, and the reaction that takes place is a combination of two distinct processes, one of which is light-dependent and the other of which is light-independent.

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Answer: Endocytosis, more

May not be right but ik the first one may be

Explanation:

1. We can not see nutrients.

2. You and I are made of macromolecules

3. Proteins can be found in plants or animals.

4. Proteins help build muscles and tissues.

5. We need fats in our diet.

6. You make about 720 mL of saliva a day.

7. The pyloric valve allows food to pass from the stomach into the small intestine.

8. Calories are a measure of energy.

9. A food calorie is the amount of heat energy it takes to heat 1 liter of water 1°C.

10. We get the minerals we need from the Earth’s crust.

11. We get minerals without eating rocks or dirt from plants.

12. Calcium is important for bones and teeth.

13. You need iron for blood and muscles.

14. The Recommended Dietary Allowance (RDA) represents how much of each nutrient you need every day.

15. Carbohydrates are very good energy sources.

16. One source of carbohydrates cereals

17. Proteins are the building block of your body.

18. Milk, eggs, and meat are sources of protein.

19. Eating certain plants together, such as nuts and seeds can give you complete protein.

20. Our brains are 60% fat.

21. It is False that Foods with the same number of calories are equally good for you. The correct option is False.

22. The potato contains minerals, fiber, and vitamins that the soda doesn’t have.

23. Our body does not digest fiber.

24. We need fiber for easy digestion of food.

25. When you are not eating it is called fasting.

26. The foundation of a food pyramid is the plants.

All living things require nutrients, which are food-based molecules, to produce energy, develop, grow, and reproduce. Digested nutrients are subsequently broken down into their component elements for utilization by the organism.

Micronutrients and macronutrients are the two primary categories of nutrients.

Nutrients include macromolecules proteins, fats, and carbohydrates.

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Answer:

from areas of high pressure to areas of low pressure

Explanation:

Air flows from areas of high pressure to areas of low pressure due to pressure differences.

Air molecules naturally move from an area of higher pressure to an area of lower pressure in an attempt to equalize the pressure.

This movement of air creates wind or air currents.

The air moves in the direction where the pressure gradient is steepest, which is typically from areas of high pressure to areas of low pressure.

This movement is known as the flow of air from high pressure to low pressure.

Hope this helps!

Answer:

from areas of high pressure to areas of low pressure

Explanation:

The moving force of air flows from areas of high pressure to areas of low pressure. Air moves from high-pressure zones to low-pressure zones because of the difference in air pressure. This movement of air from high to low pressure is what creates wind. The greater the difference in pressure between two areas, the stronger the wind will be. So, the correct answer is "from areas of high pressure to areas of low pressure".

Aquaculture can be a useful practice for the environment and food systems. However, it must be implemented responsibly to minimize negative impacts. Proper waste management, disease control, and careful site selection are essential for sustainable aquaculture.

Aquaculture is the practice of farming aquatic organisms, such as fish and mollusks, in controlled environments. It has both benefits and problems associated with coastal and open-ocean settings. Let's consider the usefulness of aquaculture for the environment and the security of food systems, as well as the costs involved.

1. Benefits of Coastal and Open-Ocean Aquaculture:
- Environmental Sustainability: Aquaculture can reduce overfishing and pressure on wild fish populations, helping to maintain biodiversity in oceans and coastal areas.
- Food Production: It provides a consistent and reliable source of seafood, which helps meet the growing demand for protein-rich food globally.
- Economic Growth: Aquaculture supports job creation and economic development, especially in coastal communities that rely on fishing and related industries.

2. Problems of Coastal and Open-Ocean Aquaculture:
- Environmental Impact: Concentrated fish waste, excess feed, and chemicals used in aquaculture can pollute the water, affecting local ecosystems. This pollution can harm wild fish and other marine organisms.
- Disease and Escapes: High-density fish farming can lead to the spread of diseases among farmed fish, which can then affect wild populations if fish escape from aquaculture facilities.
- Habitat Destruction: Coastal aquaculture, in particular, may require the conversion of natural habitats, such as mangroves or wetlands, into fish farms, resulting in the loss of valuable ecosystems.

Is Aquaculture a Useful Practice?

Aquaculture can be a useful practice for the environment and food systems, but it is important to address the associated challenges. The benefits of aquaculture, such as reduced pressure on wild fish stocks and economic growth, are significant. However, the negative impacts, including pollution and habitat destruction, need to be managed carefully to ensure the sustainability of aquaculture operations.

Differentiating Fish Farming and Filter Feeder (Mollusk) Farming:
Fish farming involves raising fish in tanks, cages, or ponds, while mollusk farming focuses on cultivating filter-feeding shellfish such as oysters and mussels.

Fish farming:
- Requires controlled feeding and management of fish species.
- Can be prone to disease outbreaks due to high stocking densities.
- May use artificial feeds that can contribute to pollution.
- Can have a higher environmental impact due to waste and escaped fish.

Mollusk farming:
- Relies on the natural filtration capabilities of bivalve shellfish to improve water quality.
- Typically has a lower environmental impact as bivalves consume natural plankton and improve water clarity.
- Can enhance local ecosystems by providing habitat for other organisms.
- Generally requires less feed and produces less waste than fish farming.

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The given scenario involves a patient with traumatic brain injury who has been diagnosed with an IV drip containing Na+ at a concentration of 513 mmol/L. The patient's cells have an intracellular Na+ concentration of 154 mmol/L. In this situation, water will move out of the cells.

The correct option is C. Water will move out of the cells.Why will water move out of the cells?In this situation, water will move out of the cells because of the process of osmosis. Osmosis is the process by which water moves from an area of low solute concentration to an area of high solute concentration. In this scenario, there is a higher concentration of Na+ ions in the extracellular fluid (513 mmol/L) than the intracellular fluid (154 mmol/L). Due to this, water will move out of the cells into the extracellular fluid where the concentration of Na+ ions is higher.

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When the resting membrane potential becomes less negative (more positive), that is called depolarization.

What is depolarization?

Depolarization is also known as hypopolarization, also called rising phase. Depolarization is nothing but loss of polarization. More specifically, it is the loss of differences in charge inbetween the inside and outside of a muscle or nerve cells’ plasma membrane. This occurs due to changes in permeability and also migration of Na+ ions to the interior.

The gated sodium (Na+) ion channels present on the neuron's membrane open up suddenly and allow sodium ions (Na+) present outside the membrane in order to rush inside the cell. The internal charge of the nerve changes from -70 mV to -55 mV as the sodium (Na+) ions quickly enter the cell.

So therefore, depolarization is nothing but resting membrane potential becoming less negative (more positive)

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There are two theorys for the formation of galaxies, the theory of accretion that blobs of stars came together to form galaxies, and the collapse theory that says that galaxies are formed by the collapse of an enormous gas cloud. While collide theory says that large galaxies absorbs smaller galaxies, being more ralated to galaxies destruction than creation. Therefore, the alternative A. collapse theory is the correct one as a definition of galaxies formation.

Slavery was abolished and voting rights were extended to all male citizens. The Thirteenth Amendment (ratified in 1865) abolished slavery. The Fifteenth Amendment (ratified in 1870) extended the voting right to all male citizens without discrimination in terms of race, color, or previous servitude.

Answer:

The relationship between gut bacteria and we the host is a mutualistic relationship. This is a form of relationship where both we and the bacteria benefit from the bacteria living in our gut.

They help us in our digestion process to break down some food particles into their basic units, some of which we would not be able to do without them. They also help to keep the gut’s surface intact, provide vitamins, and fight off other harmful bacteria.

Bacteria use immunity genes to neutralize toxins and protect themselves against been destroyed by our immune system by copying our immune resistance code, and using this code to make their outer membrane.

Cochlea  is the jelly-like structure within the ear that hair cells press against in response to pressure waves, helping the body determine the intensity of a sound.

What is Cochlea?

In the inner ear, there is an auditory organ called the cochlea. The cochlea contains sensory receptors for hearing. It does this by converting the auditory information into neural impulses, which are then transported to the brain by the auditory nerves and afferent nerve fibres, where they are combined and translated into sound.

In the human temporal bone of the skull, the cochlea is made up of a coiled labyrinth that is similar to a snail and measures around 10 mm in width. It contains roughly 2.5 turns. It is separated into three primary fluid chambers and is filled with fluid.

Therefore, Option C is correct.

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Explanation:

Hey mate here's your answer :-

Lipid digestion and absorption requires the coordinated actions of enzymes and specialized cells in the small intestine.

Lipid digestion and absorption require the coordinated actions of two key organs: the pancreas and the small intestine. The pancreas secretes digestive enzymes, such as lipase, into the small intestine, which break down fats into smaller molecules, such as fatty acids and glycerol. These molecules are then absorbed by the small intestine and transported to the liver, where they are further processed and distributed throughout the body. The small intestine also produces bile, a fluid that helps emulsify fats and make them more accessible to the digestive enzymes. The coordinated actions of the pancreas and small intestine are essential for efficient lipid digestion and absorption, which is critical for the uptake of essential fatty acids and fat-soluble vitamins, such as vitamin A, D, E, and K.

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Answer: Het3rozygous genotypes are the ones with a capital letter and a lowercase letter; Hom0zygous genotypes are the ones with either two capitals or two lowercase letters

Explanation:

The high amount of lactose in a bacterial cell activates the lac operon, which results in the production of the enzymes needed to metabolize lactose.

The tryptophan operon in bacterial cells is a cluster of genes that encode the enzymes required for the biosynthesis of tryptophan.

The genes in this operon are regulated by a repressor protein that binds to the operator region upstream of the promoter, preventing RNA polymerase from transcribing the genes.

The repressor protein is activated by binding to tryptophan molecules.

When there is a high amount of lactose inside a bacterial cell, it can activate the lac operon, which encodes the genes needed to transport and metabolize lactose.

This activation occurs due to the binding of lactose to the lac repressor protein, which causes a conformational change and releases the repressor from the operator region, allowing RNA polymerase to transcribe the genes.

However, lactose has no direct effect on the tryptophan operon. The tryptophan repressor protein will continue to bind to the operator region, inhibiting transcription of the genes, as long as there is enough tryptophan present to activate it.

Therefore, the high amount of lactose inside a bacterial cell will have no impact on the expression of the tryptophan operon.

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Answer:

Animals get energy from food.

Answer:

Eating the plants, or other organisms.

1. (i) The waterweed will grow best in beaker A (in normal daylight).

(ii) The waterweed in the box changed from dark green to pale yellow.    This happened because the black box blocked the light due to which the waterweed was not able to carry out the process photosynthesis.

2. There were not much plants growing below the surface in the school pond with lots of water lilies in it as the excessive growth of water lilies inhibited the penetration of light in the pond.

3. (i) The waterweed will grow better in beaker E containing pond water and fertilizer.

(ii) Fertilizers contain minerals which help the plants to grow.

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Answer: C. Fertilization would result in a zygote with twice as many chromosomes as the parents.

Explanation: Hope this helps

Answer:

The zygote would have two nuclie

Explanation:

Answer:

C A feature that can be measured and is given a range of values.