Complete the following analogy regarding cell division.

Water is one of the most powerful forces on Earth. How does the example shown here illustrate the theory of uniformitarianism?

Solnce55 [7]

Answer:

Explanation:

The theory of uniformatrianism was proposed by James Hutton, a Scottish Geologist by profession.

This theory was a contrast proponent to the tenets of the theory of catastrophism in existence before then in the scientific circles

The theory states that "the present is the key to the past and geologic processes occurring today have happened in the times past".

The theory correlates geologic processes as continuous in nature rather can punctuated situations.
Erosion occurring today has been changing the land surface on earth as far back into the geologic times and periods.
From the image, the erosional activities are still continuing today.

8 0

2 years ago

If 33 of the 300,000 people in Corpus Christi, TX, have PKU, how many people are carriers (heterozygous) for PKU?

miv72 [106K]

The number of people who are carriers (heterozygous) for PKU if there are 33 of the 300,000 people in Corpus Christi, TX, have PKU is 15. Heterozygous or also called as zygosity refers to having the unlike genes or different genes.

8 0

2 years ago

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Maggie's Plant Experiment In this exercise you will read the following scenario and identify the parts of the scientific method

ANTONII [103]

Answer:

Please find the identified steps of the scientific method below

Explanation:

A scientific method is a series of steps that aims at solving a problem. The steps in a scientific method include:

1. Making observation: In this experiment, Maggie observed when she read that some plants grow better if the soil is acidic. This is her observation that led to the scientific question: Do plants grow better in an acidic soil?

2. Formulating hypothesis: Hypothesis is a testable explanation to a problem. In this experiment, Maggie's hypothesis is; IF acid is added to the soil, THEN plants will grow better

3. Test hypothesis: the hypothesis is tested by conducting an experiment. In this case, Maggie places two geranium plants of the same size in two pots. Then she added a tablespoon of vinegar to one of the pots and allows the other grow normally without acid. The independent variable in this experiment is the vinegar added while the dependent variable is the height of the plants. The plant group with the vinegar is the experimental group while the plant group without vinegar is the control group. The constants of this experiment are same sunlight, same amount of water, same location etc.

4. Analyse data: The growth of the control and experimental plants were measured every week for five weeks by measuring their heights. The height (cm) of the plants with vinegar for the five weeks as as follows: 10.0, 12.4, 14.8, 18.0, 21.4 while the height in cm for the plants without vinegar for the five weeks is as follows: 10.0, 11.5, 13.0, 15.7, 17.8.

5. Conclusion: Based on the result, the plants exposed to vinegar grew better each week except week 1, which is the week they started. Hence, the hypothesis of this experiment will be ACCEPTED because the experiment proves it.

7 0

1 year ago

Plate Boundaries and Movement lab report Directions Now that the lab is complete, it is time to write your lab report. The purpo

Paladinen [302]

Answer: 1.) You want to answer, possibly, your hypothesis.

2.) If you have a prompt and a claim, write your hypothesis down in this form: If ______________, then________________.

3.) Use the scientific process of performing an experiment, like observation, measurement, etc.

4.) LABEL all the sides of your (bar, line, etc) graph.

5.) Write a sentence using your graph in this form:

It (increased/decreased)_________ because _________.

This value is the (greatest/least) __________ because ___________.

6.) Explain why or why not the hypothesis supported your observations and measurements.

My hypothesis (did/didn't) support my experiment because ____________.

7.) In other words, how does your graph, observations, etc., go along with your hypothesis?

Hope this helps.

3 0

2 years ago

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Compare and contrast the differences between mature human eggs and sperm in the following questions. For each prompt, determine

Llana [10]

Answer:

QUESTION 1:

a. They undergo unequal cytoplasmic division during meiosis- eggs

b. Their chromosomes have undergone genetic recombination and independent assortment- both gamete types

c. They contain specialized secretory vesicles called cortical granules just under the plasma membrane- eggs

d. They are characterized by a flagellum. Most of these gametes die without ever completing meiosis- sperm

e. The acrosomal reaction occurs in these cells- sperm

f. They can be derived from any adult cell type- neither gametes

QUESTION 2:

c) The egg is surrounded by a mineralized shell added before the egg exits the body.

Explanation:

a) Female reproductive cells undergo meiosis to produce one large egg and three polar bodies. However, an unequal cytoplasmic division occurs in favour of the large egg.

b) Since both egg cell and sperm cell are produced via meiosis and meiotic division involves the processes of genetic recombination and independent assortment, hence, both gamete types have their chromosomes underg genetic recombination and independent assortment.

c) Egg cells contain specialized secretory vesicles called cortical granules just under the plasma membrane. This cortical granules help prevent more sperms from fertilizing the same egg after it has been fertilized.

d) Sperm cells possess flagellum for motility in the female reproductive tract. Most of the sperm cells die without ever completing meiosis.

e) Sperm cells possess an head-covering structure called ACROSOME. Acrosome reaction is the process undergone by sperm cells permeate the zona pellucida of the egg.

f) Gametes are specifically derived from adult reproductive cells and hence, NEITHER TYPE OF GAMETE can be derived from any adult cell type

QUESTION 2:

The egg in Sea urchins is surrounded by a mineralized shell added before the egg exits the body to the external environment. This does not occur in the humans because the egg does not leave the body but fertilized internally.

8 0

2 years ago