1. A heterozygous tall pea plant is crossed with a short plant. The probability that an F1 plant will be tall is:a. 25%
b. 50%
c. 75%
d. 100%

Answers

Answer 1

Answer: The probability that an F1 plant will be tall when it is cross with a heterozygous tall pea plant when crossed with a short plant is 50%. This is because there is only one tall and one short. Therefore, the likelihood is kin to a coin flip.

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Cyclin-dependent kinases (cdks are enzymes involved with the control of mitosis; drs. lee hartwell and paul nurse won the nobel prize for physiology or medicine in 2001 for their work on cdks. what organism was used to study these enzymes

Answers

Answer:

Dr. Leland Hartwell utilized the baker’s yeast; Saccharomyces cerevisiae

Paul Nurse used a different type of yeast, Schizosaccharomyces pombe, as a model organism.

Explanation:

Dr. Leland Hartwell utilized the baker’s yeast; Saccharomyces cerevisiae, as a model system, to study the enzymes that are involved in the control of mitosis including deriving the checkpoints concepts etc. Paul Nurse used a different type of yeast, Schizosaccharomyces pombe, as a model organism.

The scientific method could not be used to study which of the following phenomena? the effect of daily exercise on gerbils the authenticity of UFO sightings whether Vitamin C consumption reduces cold symptoms the effects of second-hand smoke on household pets

Answers

The correct answer is B. The authenticity of UFO sightings

Explanation:

The Scientific Method refers to a procedure widely used in science that implies observation, measurement and a hypothesis that is formulated based on observations and then tested or proved through different methods. Because of this, phenomena that can be studied by using the scientific method are those that can be somehow controlled and tested and that are objective rather than subjective.

In the case of the phenomena "The authenticity of UFO sightings" this cannot be studied using the scientific methodology because this cannot be constantly observed, controlled or tested and also the "authenticity" is subjective rather than objective which makes almost impossible to observe the phenomena consistently, create a hypothesis and then prove it and therefore the Scientific Method cannot be applied to this phenomena.

The scientific method could not be used to authenticate UFO sightings. There is no way to set up a control and variable.

Stage 1 of delivery averages about 8 hours but may be longer for first-time mothers.a. True
b. False

Answers

I think it might be false

Low blood levels of ______ can lead to disturbances in heart rhythm, a leading cause of death among people with eating disorders. potassium sodium chloride glucose

Answers

Potassium because it is used as a signaling molecule in the nervous system.

I believe an eating disorder would have to be something along the lines of a meat heavy diet like the Eskimo’s. Scurvy although not the same, has to do with low fruit intake.

Final answer:

Low blood levels of potassium can lead to disturbances in heart rhythm, a leading cause of death among people with eating disorders.

Explanation:

Low blood levels of potassium can lead to disturbances in heart rhythm, a leading cause of death among people with eating disorders. Hyperkalemia, an elevated potassium blood level, can impair the function of skeletal muscles, the nervous system, and the heart. It can result in a partial depolarization (excitation) of the plasma membrane of cardiac cells of the heart, leading to an inability of cells to repolarize. This can cause the heart to seize and stop pumping blood, which is fatal within minutes.

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A plant reaches its adult stage when _____. it begins photosynthesis it is fertilized it is ready to reproduce the plant parts become weaker User: All plants reproduce several times before dying. a. True
b. False

Answers

A plant reaches its adult stage when it is ready to reproduce.

The statement “All plants reproduce several times before dying” is true. The answer is letter A. Plants can reproduce several times as long as it has the gametes needed for reproduction.

Which of the following statements about prescribed burns is true?a. Prescribed burns will always have detrimental effects on ecosystems, but should be used to protecthomesb. Prescribed burns are necessary for preventing natural wildfires.c. Prescribed burns can help maintain healthy ecosystems.d. None of the above

Answers

Prescribed burns can help maintain healthy ecosystems.

Fire is a natural, common process in various ecosystems and is important to preserve a healthy forest and the quality of plant and animal growth. Many plants and animals have not only accommodated to fire but truly depend on it such as the lodge pole pine which requires fire to support in the scattering of its seeds. Naturally occurring fires also support to administer pests and disease under control by eliminating the pathogens contaminating a stand.

Prescribedburns can help maintain healthy ecosystems. The correct option is c.

Prescribedburns, also known as controlled burns or planned fires, are intentionally set fires conducted under specific conditions and managed by trained professionals.

Ecosystem Health: Prescribed burns can mimic natural fire cycles and play a crucial role in the maintenance and restoration of certain ecosystems.
Fuel Reduction and Risk Mitigation: Prescribed burns can help reduce the accumulation of dead vegetation and fuels, lowering the risk of more severe wildfires.
Habitat Management: Prescribedburns can create or maintain specific habitats for certain plant and animal species.
Disease and Pest Control: Prescribed burns can help control certain pests, diseases, and invasive species. Some pests and diseases are sensitive to fire and their populations can be reduced or controlled through carefully planned burns.

Thus, the correct option is c.

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please help me If a heterozygous dominant tall pea plant is crossed with a short pea plant, what is the expected phenotypic ratio of tall:short plants? 1:1 1:2 3:1 all tall all short