Hypothesis A: If heart rate is related to caffeine intake, then coffee drinkers will have higher heart rates. Hypothesis B: If a higher heart rate is related to caffeine intake, then the heart rate of most people will be higher 30 minutes after they drink a cup of coffee.
Which hypothesis is more useful and why?
A. The two hypotheses are equally useful.
B. Hypothesis A is more useful because it’s true.
C. Neither hypothesis is useful because they aren’t testable.
D. Hypothesis B is more useful because it suggests a way to test the relationship between heart rate and caffeine intake.
Answers
Answer: D. Hypothesis B is more useful because it suggests a way to test the relationship between heart rate and caffeine intake.
Hypothesis A and B both are suggesting that caffeine intake is related to higher heart rate. But hypothesis B is proving it more certainly by suggesting the affects of caffeine intake on heart rate. As, heart rate of most people will be higher 30 minutes after they drink a cup of coffee is testifying the fact, that higher heart rate is related with caffeine intake.
Therefore, hypothesis B is more useful because it suggests a way to test the relationship between heart rate and caffeine intake.
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Pls remove this.thank u.
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Explanation:
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Answers
Answer:
Cellulose
Explanation:
trunk is the main axis of a tree that supports the branches and is supported by roots. Cellulose makes it sturdy. Cellulose is the main substance in the walls of plant cells, helping them to remain stiff and upright.
Answer:
Cellulose, that is the molecule that makes a tree sturdy.
Explanation:
Answers
A person with Ll, a carrier, CAN produce offspring with the genotype ll (lethal) if they have children with another carrier. (a 25% chance lethal, 50% carrier, 25% perfectly normal)
B. Blue soil
C. Dark-colored soil
D. Red soi
Answers
Answers
Answer: The correct answer is- C) vacuole.
Large central Vacuole is a specialized fluid filled organelle, present only in plant cell. It is primarily involved in providing support and shape to the plant cell by maintaining the turgor pressure ( a hydrostatic force that is produced due to the cell contents against the inner side of the cell wall). The central vacuole stores water ( that flows through osmosis) and maintains turgor pressure in a plant cell.
Turgor pressure provides mechanical support and helps in the growth and development of plant.
The plant cell organelle which helps in maintaining the shape of the cell by maintaining turgor pressure is vacuole.
Further Explanation:
The vacuole is an organelle which is mainly present in animal and plant also. There is a difference in size of plant and animal vacuole. Plant cells contain vacuole in the centre of the cell which is much larger than the animal vacuole. Animal cells contain multiple vacuoles that are scattered in the cytoplasm of the cell. They contain membrane-bound sacs. The cell membranes of vacuoles are made up of phospholipids. Proteins are embedded in the cell membrane to transport small molecule. Most plant cells use vacuoles to store water. Animals don’t use vacuole as water storage they store product for endocytosis and exocytosis.
The major functions of vacuoles are:
- To store water in plants
- To provide turgor pressure
- To store material of exocytosis and endocytosis
- To store fat cells
Manly in plants, a large vacuole is present. This vacuole is enclosed by a cytoplasmic membrane which is tonoplast. This layer can easily stretch and fill with solution. They can easily fill with proton and create acidic environment inside the cell. The development of chemical gradient is helps in transporting material inside and outside of vacuole. They use proton motive force to transport molecule. The vacuole when filled completely with water exerts a pressure on walls of cells called turgor pressure. These force help in maintaining the shape of the cell. Also, allow cells to stand up in rain, wind and hail.
Learn more:
- Learn more about cell organelle brainly.com/question/5923583
- Learn more about the diffusion brainly.com/question/1386629
- Learn more about the plant brainly.com/question/862697
Answer Details:
Grade: High School
Subject: Biology
Chapter: Plant Cell
Keywords:
Membrane, vacuole, exocytosis, endocytosis, fat cells, turgor pressure, water, animal, plant, solution, material, tonoplast, cytoplasmic membrane.