Both ancient and modern cultures also use astronomical observations to understand the cycles of the natural world and the rhythms of the seasons.
How is the modern scientists and ancient culture monitors sun, moon & star?
Scientists today use advanced technology such as telescopes and satellites to monitor the movements of celestial bodies, while ancient cultures relied on observations using the nak-ed eye and simple tools such as telescopes.
Both ancient and modern cultures use astronomical observations to track time, predict eclipses and navigate. Additionally, they also use this information to understand the cycles of the natural world and the rhythms of the seasons.
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Using what you know about mutation, cellular division(mitosis), and DNA replication, explain how damaged DNA in a stem cell could cause a large impact to an organism.
Answer______________
_____________________
____________________
____________________
_______________________
Answer:
It could largely impact the way you look.
Explanation:
Since 100% of your DNA decides how you look, if even one thing changes, one part of your look would change. Sometimes it's something big like eye color, or sometimes like a small change in skin color.
What is true about the thickness of the ozone layer?
It has gradually decreased in the last couple of years.
It has remained the same in the last couple of years.
It has entirely disappeared in the last couple of years.
It has gradually increased in the last couple of years.
Answer:
A
Explanation:
The top answer is correct, over time it has become weaker.
Answer: The answer is A (It has gradually decreased in the last couple of years)
Over the Earth's surface, the ozone layer's average thickness is about 300 Dobson Units, or a layer that is 3 millimeters thick.The thickness of the ozone layer changes due to increasing concentrations of ozone-depleting substances in the atmosphere.Air motions also increase the ver- tical thickness of the ozone layer near the poles, which increases the value of total ozone in those regions. Tropospheric weather systems can temporarily reduce the thickness of the stratospheric ozone layer in a region, low- ering total ozone at the same time.It is thinning due to the release of man-made compounds called chlorofluorocarbons (CFC). The net effect that CFCs have on the ozone layer is to recombine an oxygen atom with an ozone molecule to form two oxygen molecules. From 1978 to 1991, global stratospheric ozone levels have decreased by 3%.Epkin why stored seeds must be kept dir drys
gamma ray
microwave
rapido wave
ray
Answer:
radio wave
Explanation:
1km = 1000 metres, or 10³, so it must be a radio wave
Insulin is an important hormone that allows the body to use glucose from food. After an individual eats a meal, glucose travels through the blood stream and reaches beta cells in the pancreas. The glucose causes the beta cells to release insulin. Insulin then travels through the blood stream and attaches to insulin receptors on other cells, which allows them to take in glucose and use it for energy.
What does this information best demonstrate?
A.
Cells interact with other cells for regulation and homeostasis.
B.
A hormone is a protein that performs many functions in the body.
C.
Only certain cells can use glucose to produce energy.
D.
Beta cells are not necessary for glucose to be utilized.
The best-demonstrated information is
A. Cells interact with other cells for regulation and homeostasis.
C. Only certain cells can use glucose to produce energy.
One of the important hormones in the human body is insulin. How the human body uses food to meet its energy needs is explained by knowledge of insulin and its workings.
Typically, food-derived glucose that enters the bloodstream is what causes blood sugar levels to rise. The pancreas is a gland that aids in the release of insulin to regulate blood sugar levels. Based on the blood sugar level, insulin often releases itself in a feedback system.
The insulin mechanism best exemplifies the following:
Together with glucagon, insulin contributes to the maintenance of the constant condition known as homeostasis in the human body.Considered essential for cells to use glucose and obtain energy is insulin.As a result, the mechanism of insulin in the human body shows how various cells use energy and how insulin is crucial for preserving homeostasis.
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The assistance you provide a resident with dementia will not change
throughout the progression of the disease.
False because as the diseas
Which results from an increase in the greenhouse effect?
Answer:
nitrogen?
Explanation:
Burning fossil fuels like coal and oil puts more carbon dioxide into our atmosphere. NASA has observed increases in the amount of carbon dioxide and some other greenhouse gases in our atmosphere. Too much of these greenhouse gases can cause Earth's atmosphere to trap more and more heat. This causes Earth to warm up.
Carbon dioxide (CO2) makes up the vast majority of greenhouse gas emissions from the sector, but smaller amounts of methane (CH4) and nitrous oxide (N2O) are also emitted. These gases are released during the combustion of fossil fuels, such as coal, oil, and natural gas, to produce electricity.
It is important to learn effective ways to give feedback to be an effective communicator and professional. For this
discussion, think about the 4-Step formula from the lecture. Read the scenario below, then answer the prompts.
Scenario:
Jade is a senior marketing coordinator at a large communications company. One of Jade's responsibilities is to mentor
newly hired employees like Carla. Two weeks after Carla is hired, Jade notices that Carla's email messages are
sometimes too informal. As her mentor, Jade decides to give Carla feedback to help her improve.
Hi Carla,
I saw your recent report to the manager. I know that you are supposed to send me the reports to proofread for you, but I kind of assumed you would proofread
them for basic errors before you sent them to me. I think we all were hired because we know how to use professional communication skills, so I was kind of
hoping you would do a better job of fixing your report for major errors before you sent it to me. Can you start doing that please? I am really finding it time
consuming to fix mistakes you could have spotted easily.
1. Describe if you felt Jade's feedback was effective or not based on what you learned about feedback from the lecture.
2. List suggestions on how Jade could improve her feedback to Carla.
No, I don't think that Jade's feedback was effective because she was not very direct.
What is Feeback?This refers to the response that is given to a person based on a query and is a part of effective communication.
Therefore, some suggestions that Jade can use to improve her feedback to Carla are:
Be clear and directDo away with words like "I thought", "I kind of assumed", etc.Give a procedure that can be easily understood by CarlaRead more about feedback here:
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Identify the results of humans removing large amounts of Earth's vegetation. Select all that apply.
Earth cannot control climate.
Earth cannot control chemistry.
Earth cannot control water.
Earth cannot control volcanoes.
Answer:
Earth cannot control chemistry
What happened to the music industry between and 1987
The music industry between 1980 and 1987 experienced an increase in quality and competition.
What is Intellectual Property Antitrust Protection Act of 1987?This was set up by the government to cater for the consumer welfare by ensuring quality was made priority over quantity.
There was an increase in quality and competition due to intellectual property laws which led to the music industry experiencing a positive turnaround.
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Aerobic exercise uses enough oxygen for oxidative phosphorylation in the mitochondria of our muscles.
Explain how the products of cellular respiration change as we push our bodies harder. How does this affect our ability to continue exercising?
Aerobic is one that uses oxygen in the process of generating energy in the muscles. This type of exercise works a large number of groups rhythmically.
What happens in aerobic respiration?
Aerobic respiration is the one that participates in the control and can be probable in three steps: analysis of glycolysis, Krebs cycle and oxidative phosphorylation. When breathing, we soon imagine the inflow of oxygen and the outflow of carbonic acid through our airways.
With aerobic cellular breathing, more and more ATP is broken down so that it generates more energy so that we can continue to perform the exercises. This energy causes cells to break down fats.
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______ are short segments of DNA that carry the instructions to build a specific protein.
a. DNA
b.Ribosome
c. RNA
d. Genes
The higher the standard of living for a population, the
the carrying capacity.
Select one:
O a. higher
O b. lower
What is the best description of the word ‘Variation’ in biology?
A. Differences between individuals of a species, and between different species.
B. Change over time of a species.
C. The differences between different parts of the same organism.
D. A large group of completely different items.
Place the steps of endochondral ossification in order, starting with the creation of a cartilage model and ending with the presence of epiphyseal plates between the diaphysis and epiphysis.
Answer bank:
1. The diaphysis center is vascularized, and osteoblasts deposit osteoid over calcified cartilage matrix.
2. Spongy bone and the medullary cavity form in the diaphysis.
3. Spongy bone forms in the epiphysis.
4. The epiphyseal center is vascularized, and osteoblasts deposit osteoid over calcified cartilage matrix.
5. A periosteal collar develops.
The correct steps of endochondral ossification is:
A periosteal bone collar develops.spongy bone and the medullary cavity form in the diaphysis.The diaphysis center is vascularized and osteoblasts deposit osteoid over calcified cartilage matrix.The epiphyseal center is vascularized and osteoblasts deposit osteoid over the calcified cartilage matrix.The spongy bone forms in epiphysis.Which bones grow by endochondral ossification?Long and short bones, such as the phalanges and femur, arise from a cartilage model formed by endochondral ossification. Distinguishing between these two types of osteogenesis does not imply the existence of multiple types of bone tissue.
Endochondral ossification mainly forms in two stages: modifications of the hyaline cartilage that ends with the death of chondrocytes and invasion of osteogenic cells and their differentiation into osteoblasts in the cavities previously occupied by chondrocytes for deposition.
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A life-form from another universe is found to have nucleic acid which includes six different bases - R,S,T,X,Y and Z. The percentage composition of R,S and T is always the same, and the percentage composition of X,Y and Z is always the same. Propose a reasonable hypothesis regarding the structure of the nucleic acid.
R, S, and T always have the same percentage composition, while X, Y, and Z always have the same percentage composition. Chargaff's rule is then a viable theory that can be used in this situation.
The DNA of any species of any organism must have a 1:1 stoichiometric ratio of the purine and pyrimidine nucleotides, according to Chargaff's principles. More specifically, the ratio of guanine and adenine to cytosine and thymine must be the same. This pattern is present in both the strands of the DNA.The formula comes as A + G = T + C = 1In this universe there are six base pairs R,S,T,X,Y and Z. composition of R,S and T is always same thus these can be considered the purines.The percentage composition of X,Y and Z is always the same thus these can be considered the pyrimidines.applying Chargaff's rule to these bases:R + S + T = X + Y + Z
= 1:1
Thus, the nucleic acid will contain six base pairs where bonds are formed between RX, SY and TZ.
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Type the correct answer in the box. Spell the word correctly.
What type of atmosphere was present on the Earth in early ages?
Billions of years ago, the atmosphere on the Earth did not have free oxygen.
Scientists call it highly (blank) atmosphere.
(Plato)
The type of atmosphere present on the early ages of the Earth was, basically, made of gases expelled from vulcanoes.
What is atmosphere?
Atmosphere is the layer of air that surrounds our planet. Other planets in the solar system also have an atmosphere. The gases that make up the atmosphere are held around the Earth by the pull of gravity and follow its motion.
In the primitive atmosphere, there was no presence of gases such as oxygen. The abundant gases were methane, carbon dioxide, nitrogen and even gases composed of poisonous substances. It had high temperatures and had the Sun as the main source of energy.
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Billions of years ago, Earth's atmosphere lacked free oxygen.
Scientists call this a highly toxic atmosphere.
What kind of atmosphere was present on Earth in early times?In the atmosphere of the primitive Earth there was no oxygen (O2) and nitrogen (N2), the air being composed of gases such as
methane (CH4)ammonia (NH3)hydrogen (H2) and water vapors (H2O).With this information, we can conclude that Early Earth's atmosphere may have been as toxic as that of Venus today. Earth is the only planet that harbors life (as far as we know)
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in my investigation, i saw that it can cause the growth of algal blooms which can be toxic to wild life and humans. this could also mess with marine life habitats such as coral reefs and more
Answer:
hi I am new pls follow me
What do diatoms and krill have in common?
[tex] \\ \\ [/tex]
=> Diatoms and Dinoflagellates are single-celled, eukaryotic algae. Both reside in marine environments. They are types of phytoplankton.
How many nitrogen bases are there in the codon for one
amino acid?
A 1
B 2
C 3
D 4
Answer:
C.) 3
Explanation:
A codon consists of three nucleotides. Each nucleotide has one nitrogen base. Therefore, one codon has three nitrogen bases.
Receptors are needed for which type(s) of cell signaling?
A. Long range signaling
B. Direct contact
C. Short range messaging
D. Short and Long range
Receptors are needed for both Short and Long range cell signaling.
What are receptors?In the cell, there are some special proteins who play the role of receiving external signals. These are what we call receptors.
These receptors could function for both long and short range cell signaling. Hence, Receptors are needed for both Short and Long range cell signaling.
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One cell from an organism has a cell wall but no mitochondria will this organism be multicelluar or unicelluar
Leaves absorb oxygen to make food
True or false
Answer:
false *
Explanation:
because leaves prepare their food by using raw materials .
Drag one black mouse and one white mouse in into the parent squares. What is the phenotype of all of the offspring?
A.Ff
B.Ff
C.Black
D.ff
E.white
Assuming that the allele for black is dominant over white, phenotype of the offspring will be black.
What is the phenotype of the offspring?The phenotype of the offspring of the cross between a black mouse and a white mouse is given below:
Assuming that the parents are pure breeds and that the allele for black is dominant over white, the allele for white is w and black is W.
The offspring of the cross is as follows:
WW x ww = Ww, Ww, Ww, WwThe phenotype of the offspring will be black.
In conclusion, the phenotype of the offspring depends in the genotype of the parents.
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Of the following choices, what is the approximate LD50 of the least toxic substance? 20 mg/kg, 70 mg/kg, or 130 mg/kg
The approximate LD50 of the least toxic substance will be 130 mg/Kg.
The dose necessary to cause the death of 50% of a population under test after a predetermined test period is known as the LD50 value for a drug. Commonly used as a broad indicator of a substance's acute toxicity are LD50 values. Greater toxicity is indicated by a lower LD50. A low LD50 of 500 mg/kg or less implies severe toxicity. Moderate toxicity is indicated by an LD50 of 500 to 1,000 mg/kg. A modest toxicity level of 1,000 to 2,000 mg/kg is indicated.The species is especially vulnerable to the poison if the LD50 is low. The lethal dose (LD50) of a specific poison might change significantly between several animal species.Thus out of all the options, LD50 130 mg/kg will have the lowest toxicity and 20 mg/kg will be the highest.learn more about LD50 here: https://brainly.com/question/24845532
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What is/are the main purpose(s) of meiosis? (select all that apply)
Control metabolism
✔Halve the number of chromosomes in a cell
Generate genetic diversity
Create gametes
Synthesize energy
Organism growth
Tissue repair and maintenance
Answer:
Halve the number of chromosomes in a cell.
Create gametes.
Explanation:
Meiosis is a cell division process where the parent cell divides to give four daughter cells, each containing half the number of chromosomes. It is also called as reductional division. It is important for reproduction as meiosis is the sole way for germ cells to form sperm or eggs.
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The main purposes of Meiosis include reducing the number of chromosomes in a cell by half, generate genetic diversity, and creation of gametes. Thus, the correct options are B, C, and D.
What is Meiosis?Meiosis is a special type of cell division which is also known as reductional division. It occurs in the germ cells in the sexually-reproducing organisms that involves the formation of the gametes, such as sperm or egg cells. Meiosis involves two rounds of division which are Meiosis I and Meiosis II, which ultimately results into formation of four daughter cells with only one copy of each chromosome.
Meiosis is an important type of cell division for three main reasons which are sexual reproduction of diploid organisms in which it produces gametes, it enables genetic diversity in sexually reproducing organisms, and it reduces the chromosome number in the daughter cells by half.
Therefore, the correct options are B, C, and D.
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Using the Punnett square that you created in question number 5, what is the probability that the resulting child will develop Huntington’s disease? Remember Huntington’s disease is an autosomal dominant disease meaning the presence of a dominant allele results in the development of the disease
A.25%
B.50%
C.75%
D.100%
Huntington’s disease is an autosomal dominant disease, thereby the probability that a child will develop the disease is 100% if one parent has one mutated allele (Option D).
What is an autosomal dominant disease?An autosomal dominant disease is any inherited disorder that is expressed in the phenotype in heterozygous individuals.
The mutated allele that causes autosomal dominant diseases is dominant and masks the expression of the recessive allele.
In conclusion, the probability that a child will develop the disease is 100% if one parent has one mutated allele (Option D).
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In some British hospitals as late as the 1960's flowers and plants were removed from patients rooms at night and placed at the end of the nearest hallway, then returned the next morning. This is no longer done. Can you think of a reason for this practice to have existed in the first place. (Hint: Think in terms of cellular respiration and photosynthesis, not allergies or something else.)
The reason the flowers and plants were removed from patients rooms at night was to prevent the carbon dioxide emitted from affecting the patient.
What is Photosynthesis?This is the process in which green plants manufacture their food in the presence of sunlight.
The light dependent reactions cannot occur at night due to the absence of sunlight thereby resulting in more carbon dioxide being produced during aerobic cellular respiration.
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Using the Punnett square that you created in question number 5, what is the probability that the resulting child will be heterozygous for Huntington’s disease ?
A. 25%
B. 50%
C. 75%
D. 100%
Huntington’s disease is an autosomal dominant affection. Parental's genotype FF and ff. Cross: FF x ff. F1) 100% Ff, heterozygous individuals (Option D).
What is the Huntington’s disease?
Huntington's disease is caused by a mutation in the gene that codifies the Huntington protein (Htt).
The mutation produces an altered form of the protein leading to the neuron death in certain brain areas.
Huntington's disease characterizes for being,
Hereditary, passing from generation to generation. To express the disease the person must have been born with an altered gene.Autosomal, affecting men and women equally because the mutated gene is located on an autosomal chromosome.
Dominant, meaning that by inheriting only one copy of the altered gene from any of the parents, the receiving person will express the disease. The mutation in the gene dominates over the normal gene copy.Expressed by heterozygosis. Most people affected by the disease are heterozygous, with a normal copy and a mutated copy.
Question number 5
To produce only individuals with the genotype Ff, the parentals genotypes must be homozygous dominant and recessive. This is,
Cross: The cross is done between one homozygous recessive and one homozygous dominant individual
Parentals) FF x ff
Gametes) F F f f
Punnett square) F F
f Ff Ff
f Ff Ff
F1) 100% of the progeny is expected to be heterozygous Hh, expressing Huntingnot's disease.
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Occurs when the individual inherits only one (female) X Occurs when the individual inherits only one (female) X chromosome
Turner syndrome occurs when the individual inherits only one (female) X chromosome.
What is Chromosome?This is referred to a thread like structure which contains DNA and protein components.
An individual inheriting only one female X chromosome means that the child will have turner syndrome which is characterized by short height, heart defects etc.
The complete question is:
Which condition occurs when the individual inherits only one (female) X chromosome?
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