Hi! The uninoculated lysine decarboxylase tube serves as a negative control in this experiment. It helps to demonstrate that the medium itself does not produce any color changes or reactions that could be misinterpreted as a positive result for lysine decarboxylation.
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how do organisms with many cell types develop from a single cell
Cell division, torso axis formation, tissue and organ development are all part of development, and cell differentiation refers to acquiring a final cell type identity.
What is cell division?The process by which a parent cell divides into two daughter cells is known as cell division.
Cell division is usually part of a larger cell cycle during which the cell grows and replicates its chromosomes before dividing.
Cell division occurs in two stages: mitosis and meiosis. When most people say "cell division," they're referring to mitosis, the process of creating new body cells.
Meiosis is the process by which egg and sperm cells are formed. Mitosis is a necessary process for life.
Multicellular organisms form in a variety of ways, including cell division and the aggregation of many single cells. Colonial organisms form when many identical individuals band together to form a colony.
Thus, this way, organisms with many cell types develop from a single cell.
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what does dna have a high concentration of
Answer:
Nucleotides
Explanation:
DNA is made of chemical building blocks called nucleotides. These building blocks are made of three parts: a phosphate group, a sugar group and one of four types of nitrogen bases. To form a strand of DNA, nucleotides are linked into chains, with the phosphate and sugar groups alternating
A stop enzyme is used in protein synthesis to stop tRNA from carrying messages from the DNA to the ribosome.
True
False
The eyespot of a euglena is damaged. How will this affect the organism's basic functions?
A The euglena will lose its flexibility
B. The euglena will be unable to reproduce.
C. The rate of photosynthesis in the euglena will be reduced.
D. The ability of the euglena to move away from light will be reduced.
When we talk about soil depletion, which soil horizon are we talking about? Thank you
Answer:
Surface Horizon (A)
Nutrient depletion of soils is a widespread soil degradation phenomenon that occurs as a consequence of soil erosion (it is the topsoil in which generally most soil nutrients are present that erodes fastest) but also because of poor management practices, such as slash and burn and other subsistence agricultural.
How would Earth be different without the greenhouse effect?(1 point)
A.There would be more solar energy reaching Earth.
B.The atmosphere would contain more methane.
C.The oceans would contain more carbonic acid.
D.There would be more ice on Earth's surface.
Answer:
I think the answer will be:
D. There would be more ice on Earth's surface.
Explanation:
Without the greenhouse effect, the Earth would have an average temperature of -18°c and life would not be able to survive.
The Earth would be different if the greenhouse gasses didn't even exist.
The Earth's surface would be covered in more ice.
So, option D. is correct.
Define greenhouse effect.The greenhouse effect happens when solar energy passes through a planetary system and heats its surface, but the air prevents the energy from going directly to space, leading in a warming climate.
The Earth would be different if the greenhouse gasses didn't even exist.
The Earth's surface would be covered in more ice. So, option D. is correct.
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Please help only 2 questions, multiple choice
Name one organism that produces glucose through the process of chemosynthesis. Explain why it cannot produce glucose using photosynthesis.
Answer:
During chemosynthesis, bacteria living on the sea floor or within animals use energy stored in the chemical bonds of hydrogen sulfide and methane to make glucose from water and carbon dioxide (dissolved in sea water). Pure sulfur and sulfur compounds are produced as by-products.
Explanation:
Answer:
During chemosynthesis, bacteria living on the sea floor or within animals use energy stored in the chemical bonds of hydrogen sulfide and methane to make glucose from water and carbon dioxide (dissolved in sea water). Pure sulfur and sulfur compounds are produced as by-products.
Explanation:
4.Paramecium is able to move by hairlike structures called
____
Answer:
Cilia
Explanation:
_____ allows the cell to grow larger and replicate its DNA in order to prepare for cell division, known as _________. The __________ is the cell that divides to become two new _________.
Answer:
_Mitosis_ allows the cell to grow larger and replicate its DNA in order to prepare for cell division, known as __meiosis__. The __parent cell_ is the cell that divides to become two new _daughter cells__.
Explanation:
The excerpt explains cell division. Let us define some of the terms used:
Mitosis: Mitosis is a stage in the cell cycle where a parent cell divides/replicates into two identical daughter cells. They are identical because they contain the same number of genetic information after division. Mitosis is responsible for cell growth in all somatic cells
Meiosis: Meiosis is a type of cell division in germ (reproductive) cells where the parent cell divides into two daughter cells which contain half the number of genetic information (haploid) as the parent cell.
Parent cell: This refers to the original cell that undergoes division into two or more daughter cells
Daughter cells: The daughter cells are the resulting cells produced after cell division.
For a better understanding of the whole cell division cycle, please read-up the stages contained in both the mitosis and meiosis.
How can you use what you know about chemical reactions to explain what happens to food molecules when you eat?
Answer:
Chemical digestion involves the secretions of enzymes throughout your digestive tract. These enzymes break the chemical bonds that hold food particles together. This allows food to be broken down into small, digestible parts.
Explanation:
I AM LITERALLY CRYING RIGHT NOW PLEASEE HELPPP WILL MARK BRANLIEST HELPPP MEE
Part 1: Explore
Based on your research and observations of the three common states of matter, answer the
following questions.
Out of the videos, animations, and images you researched, which was your favorite? Why?
Do you feel it accurately represented the differences between each state of matter
How does the space between the particles in each state of matter differ?
How do the particles in each state of matter move?
Part 2: Explain
Examine the heating curve of water below, and then answer the questions about it. If you require the use of a text reader, open the file Heating Curve of Water to receive the information.
Which three parts of the graph’s curve represent the solid, liquid, and gaseous state of water?
Explain your reasoning.
Which point of the graph’s curve represents the melting point of water? Explain your reasoning.
Which point of the graph’s curve represents the boiling point of water? Explain your reasoning.
What happens to the energy of water in Part B and Part D of the graph’s curve? How do you know?
Why does the temperature of the water stay the same when it melts and boils?
Now comes the hands-on part of your project! You will continue to explore phase changes by performing an experiment and creating your own heating curve. Before you begin your experiment, read over the following information.
The materials you will need for your experiment are listed below.
small pot
measuring cup (must have mL and oz markings)
spoon (wooden, plastic, or metal)
ice
water
stove
thermometer (should have units in °C
Time (min) Temperature of Water (°C) Observations of Water
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Place 14 oz of crushed ice into a small pot. Then add about 125 mL of water to it.
Using the thermometer, measure and record the initial temperature of the ice water. List this temperature in °C in the “0” minutes row of your data table in the lab handout. *Do not allow the thermometer to touch the bottom of the pot when recording measurements.
Place the pot on the stove, and turn the knob to the medium-low setting.
Using the thermometer, measure the temperature every minute until the water begins to boil vigorously. Record this data in the table on your lab handout.
At each measurement, also record what is happening to the water. Be sure to record the times of these events:
The ice melts.
The water forms steam.
The water begins to boil.
Once the water has begun to boil, stir the water constantly with the spoon.
Continue to measure and record the temperature every minute until almost all the water has boiled and the pot is close to empty.
Record the last temperature, and turn off the stove. DO NOT TOUCH THE POT WITHOUT SAFETY EQUIPMENT.
Create the x-axis and y-axis of a graph.
Label the x-axis as follows: Time (min).
Label the y-axis as follows: Temperature of Water (°C).
Along the x-axis, create and label 15 marks, one for each minute of the experiment. (Hint: The origin starts at 0.)
Along the y-axis, create and label temperature markings for every 20 degrees. (Hint: The origin starts at 0.)
Refer to the data from your experiment to plot the points on your graph. Then connect each of the data points with a line.
Look over your graph to make sure it is clear and correctly labeled.
Either save your graph as a computer file, or take a picture of your graph and upload it as a file on your computer.
Describe your experience in performing the experiment. What went well? What could have been
improved?
Examine your line graph. How does the graph’s slope change over time?
Examine your line graph. Why does the slope change?
How could you apply the knowledge gained from this experiment in the real world?
Hint: Think of cooking.
Make a prediction. How do you think adding other substances to the water would affect its
heating curve?
THANK YOU SO MUCH
Answer:
think of cooking
Explanation:
the reason is that I just know it
A large group of seals from Prince Harold Coast Antarctica has emigrated to Oates Coast Antarctica How will this impact the remaining seal population Prince Hard Coast
A The Prince Harold population will decrease
B. The Prince Harold population will increase
C The Prince Harold population will be reduced to zero
DThis will have no impact on the Prince Harold population
Answer:
B
Explanation:
Because now it’s a larger group
What is science????
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Which process requires ATP in order to release particles from a cell to maintain homeostasis?
Answer:
Active Transport uses energy (atp) to maintain homeostasis within cells. Organisms use energy contained in their cells to allow proteins to make channels in the membrane for transport.
NADP+ is an example of an electron carrier. Describe its function in photosynthesis.
Answer:
Its ferment oxidant-renewal of bio-reactions at cells.
Explain the statement “all cells perform respiration but not all perform photosynthesis”.
All cells perform respiration but not all perform photosynthesis because of the absence of the plastids.
Respiration:
It is a process by which organisms produce energy by degrading glucose.
It is occur in mitochondria in eukaryotes and in plasma membrane in prokaryotes.
Photosynthesis-
It is a process by which photoautotrophic organisms produce glucose from the Carbon dioxide and water by capturing the sunlight using chlorophyll.
Chlorophyll is found in the plastid of plants and algae.
Therefore, all cells perform respiration but not all perform photosynthesis because of the absence of the plastids.
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Brady took a cutting from a sweet potato vine in his family garden and placed the vine in a small vase filled with water. After about a week, tiny roots had begun to grow. What is this an example of
Answer:This is an example of asexual reproduction.
Explanation:
Reproduction is defined as the ability of living organisms to produce offspring, that is, new individuals of their type. Living organisms have developed many methods of reproducing. These can be either ASEXUAL or SEXUAL.
Asexual reproduction: In asexual reproduction, an individual produces an offspring by itself, that is, only one parent is present. This type of reproduction is common among flowering plants. Examples of asexual reproduction includes:
--> Fission
--> Budding
--> Spore formation
--> Fragmentation and
--> Vegetative propagation.
The sweet potato vine is reproduced by an asexual means known as vegetative propagation. Here, a new plant grows from any portion of an old one other than the seeds. When stem cutting are taken from the vine, new storage roots are formed within few days.
Brady took a cutting from a sweet potato vine in his family garden and placed the vine in a small vase filled with water. After about a week, tiny roots had begun to grow which is an example of - Asexual reproduction.
Asexual reproductionis a type of reproduction that does not involve the fusion of gametes or change in the number of chromosomes.Examples of asexual reproduction include: Fission Budding Spore formation Fragmentation and Vegetative propagation.In the given scenario sweet potato is cultivated by vegetative propagation.Brady takes stem cuttings from the vines, which then root and form new storage roots.Sweet potatoes are relatively easy to propagate by rooting vine cuttings directly in the ground or in a well-drained rooting mediaThus, The given case shows an example of - asexual reproductions.
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the epicenter of an earthquake is:
A. along a fault
B. the same as the focus
C. directly above the focus
D. directly below the focus
Answer:
I'm positive its C :)
Explanation:
Have a great day
Help me please, I’m confused
Answer:
Photosynthesis-
Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's metabolic activities. Photosynthesis occurs in the chloroplast of a plant, which contains chlorophyll. In order for photosynthesis to take place, it needs to have water and carbon dioxide, the two very important raw materials necessary for this process. In the presence of carbon dioxide, such cells are able to convert this solar energy into energy-rich organic molecules, such as this energy-rich molecule known as glucose. Oxygen the by product of photosynthesis is inhaled by heterotrophs which aids in cellular respiration and other internal processes and then exhales carbon dioxide. ... In like manner, carbon dioxide passes from blood to the alveoli and exhaled after
Explanation:
Construct an argumentative paragraph. Do you believe it's ethical or unethical to artificially select traits in plants and or animals? Provide evidenco to suoport your claims. It doesn't matter what side you chose, but I need it asap.I will give you any mark you want.
Answer:
The ethics of artificially inserting traits in animals has been in the practice for years in the form of selective breeding, but should scientists really be editing DNA to the extent they are today? I don't believe they should. Life itself should construct itself without us interfering. Making a brand new plant just because it looks nice doesn't account for many factors, including the fact that it could be harmful to nearby plants if pollinated. In addition, generic engineering costs quite a lot of money, which should be used on other more cost effective methods, such as improving agriculture rather than creating a whole new plant that could harm entire crops. Genetic engineering isn't a necessity and humans should not play God with plant and animal life.
Suggest a way that each farm could change their farming practices to prevent pollution of the river with nitrates. Gizmo
Answer:
An improved agricultural practices such as adjustment of application rate, application of the right amount of nitrogen, use of slow controlled release fertiliser, applying nitrogen fertilisers when least susceptible to loss, crop rotation
Explanation:
The various ways are available to reduce or prevent pollution of the river with nitrates, the most effective is:- reducing or not use of artificial or industrial-based nitrogen fertilizers and using biofertilizers.
Agriculture or farming contributes to water pollution when using fertilizers more than the required amount or easily lost fertilizers. This increases the of nutrients including nitrates in the river that cause the growth of algal bloom and eutrophication.
There are several ways to control the nitrates in the river:
adjustment of using rateapplication of the right amount of nitrogenslow-release fertilizernitrogen fertilizers when least susceptible to losscrop-rotation and use of legumesavoiding over-irrigationThus, the correct answer is: reducing or not using artificial or industrial-based nitrogen fertilizers and using biofertilizers.
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The sugars of a DNA and RNA molecule are alternated with in the backbone of the strand
Answer:
A phosphate backbone is the portion of the DNA double helix that provides structural support to the molecule. DNA consists of two strands that wind around each other like a twisted ladder. Each strand has a backbone made of alternating sugar (deoxyribose) and phosphate groups. Attached to each sugar is one of four bases--adenine (A), cytosine (C), guanine (G), or thymine (T). The two strands are held together by bonds between the bases, with adenine forming a base pair with thymine, and cytosine forming a base pair with guanine.
Examining different cells such as the plants, animal, and fungus cells. Identify the different organelles found in different cells and list the organelles and structures the characterize each of them.
Answer: Organelle is a sub-unit of cell and it is involved in performing specialized function within the cell. The type of organelles vary from organisms to organisms.
Explanation:
1. Centrioles are the cell organelles in which the spindle fibers are organized to which the chromosomes attach and mitotic division takes place. These are present only in animals and they are absent in plant and fungal cells.
2. Vacuoles are the storage organelles which store excess water, waste metabolites, sugars and other components in them. In plant cells they are of larger size whereas the vacuoles are small in size in case of the animal and fungal cells.
3. The plants cells and fungal cells have cell wall made up of cellulose (plants) and chitin (fungus) respectively. The cell wall is absent in animal cells.
4. The plant cells and fungal cells do not possess cilia and flagella for locomotion whereas animal cells have cilia and flagella.
how does the coconut plant adapt in goa
Goa's climate is tropical, hot all year round, with a long and sunny season, which runs roughly from mid-October to mid-May, and a rainy season due to the south-west monsoon, more or less from late May to early or mid-October, and characterized by stuffy weather, cloud cover and frequent rains, which occur almost daily .
The coconut seed is especially well adapted to increasing its range by the method of ocean dispersal. The seed floats when its outer layers dry out. The buoyant coconuts drift on ocean currents and end up on tropical beaches where they germinate and take root.
Coconut tree grows only in the tropical climate. This plant live on the sandy soil, requires a lot of sunlight and regular rainfalls. Coconut tree does not tolerate low temperatures and low percent of humidity.
so goa is one place which is suitable for growing coconut.
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Use the information to answer the following question.
A population of rabbits lives in a grassy field that is lush and green in summer and covered in snow in winter. At the start of the summer,
75% of the population are white rabbits, and the remaining 25% of the population are brown rabbits. In rabbits, white (W) is dominant
over brown (w). During the summerthe field where they live experiences a drought. The
summer drought lasts for two years, through
many generations of rabbits.
Which prediction BEST estimates the expected percent of white and brown rabbits in the population at the end of the
drought?
O A. The rabbit population will consist of 0% white rabbits and 100% brown rabbits.
OB. The rabbit population will consist of 35% white rabbits and 65% brown rabbits.
C. The rabbit population will consist of 95% white rabbits and 5% brown rabbits.
D. The rabbit population will consist of 80% white rabbits and 20% brown rabbits.
Answer:B
Explanation:
The rabbit population will consist of 35% white rabbits and 65% brown rabbits. Therefore, option B is correct.
What are the limiting factors of the rabbit population?Until a limiting factor, such as low reproduction, food scarcity, predation, disease, and/or weather conditions restrict populations, the population tends to grow.
Some density-dependent limiting factors are the spread of pathogens, competition for nesting locations, the destruction of habitat, increase in the population of predators. Several predators, including raptors and coyotes, use rabbits as food, but in urban and suburban areas, cats and dogs pose the biggest threat. Some abiotic limiting factors are drought, flood, earthquake, and all types of natural disasters.
The rabbit population will consist of 35% white rabbits and 65% brown rabbits. Therefore, option B is correct.
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Another name for the cells in plants and animals is
sentence?
cells
Answer:
Eukaryotic Cells
Explanation:
Eukaryotes are plants and Animal cells.
Another name for the cells in plants and animals is eukaryotic cells.
DNA carries the information needed to make proteins. How is this information used to make proteins?
Answer:
The information contained in DNA is expressed giving rise to proteins, through transcription processes, a step by which the information is transferred to a messenger RNA molecule (m-RNA) and, through the process of translation, the message carried by m-RNA is translated into protein.
Answer:
DNA is transcribed into mRNA. Ribosomes "read" the mRNA and translate each group of three nucleotides into amino acids to build proteins, with the help of tRNA.
Explanation:
what products of glycolysis are used in celluar respration
Answer:During the process of glycolysis in cellular respiration, glucose is oxidized to carbon dioxide and water. Energy released during the reaction is captured by the energy-carrying molecule ATP adenosine triphosphate.
Explanation:
Design your own scenario related to Bacteria or Viruses. Identify the independent and dependent variables.
Answer:
An experiment where an antibiotic is tested against bacteria. The antibiotic can vary in its concentration for example, different amounts are applied to a sample of bacteria to see if it is affected by the action of the antibiotic and if so, in what concentration. So, the independent variable is the concentration of antibiotic while the dependent variable is the survival (or not) of the bacteria.
Explanation:
An independent variable is a variable that represents a quantity that the scientist modifies in an experiment. A dependent variable represents a quantity whose value depends on how the independent variable is modified. This is the variable being studied and measured.
So, an example of this applied to bacteria or viruses could be:
An experiment where an antibiotic is tested against bacteria. The antibiotic can vary in its concentration, different amounts are applied to a sample of bacteria to see if it is affected by the action of the antibiotic and if so, in what concentration. So, the independent variable is the concentration of antibiotic while the dependent variable is the survival (or not) of the bacteria.
To complete the experiment, an antibiotic whose effect is already known can be used as a positive control. That is, it is already known to kill the bacteria. And as a negative control you can simply use water, which has no effect and is known not to kill the bacteria. In this way, we validate the results and make sure that there is not something else that is affecting the bacteria and that only the antibiotic being studied has an influence.