Answer:
Experimental Procedure:
Mix 10 drops of tincture of iodine with 30 drops of water to make an iodine solution. Put a cracker on a plate, and test it for starch using a drop of the iodine solution. Chew a second cracker for 60 seconds until it is completely mixed with saliva.
If you find a rock that has a belemnite fossil in it. how old is the rock? Explain your reasoning
Answer:
See below.
Explanation:
Belemnites is a genus of an extinct group of cephalopodsThese cephalopods existed in the Early Jurassic period from the Hettangian age (196.5–199.6 million years ago) to the Toarcian age (175.6–183.0 million years ago). Therefore, the discovered rock could be anywhere from 175.6 - 196.5 million years oldhow can you demonstrate that plants prepare their own food in their leaves right with an experiment
Answer:
the process through which plants prepare there food is called photosynthesis, they absorb carbohydrates and release oxygen during the night.
How can you determine the cell cycle stage of a plant cell?.
Answer:
based on measurement of cellular DNA content.
Explanation:
Which is hotter spica or Vega?
Answer:huh I dunno what that is
Explanation:
i need hel at science quick ASAP
Answers:
D) According to the graph, obesity and diabetes are intertwined, which could be why obesity and diabetes are linked.
E) Diabetes had the greatest rise in prevalence in 1997 until 2000, with prevalence percentages between about 76% to 78%.
Explanation: Explanation for these answers are below:
D) Looking at the graph, obesity and diabetes had similar prevalences in 1997 and 1998, and started to part ways a little in 1999. In fact, even without the graph, scientists have known for a long time that people who have obesity also have diabetes. This graph supports that claim because of how closely linked diabetes and obesity are and how similar the prevalence percentages are.
E) Diabetes had the greatest rise in 1997 to 2000, which had a 78% prevalence by 2000. Obesity had very similar prevalence percentages from 75.5% to 77% in 1997 to 2000.
2. Why are the authors looking at differences in functional groups and species richness for plant biomass accumulation?
They want to understand they both affect diversity and how they interact with other global chance factors.
What is Diversity?This is defined as a measure of the range and distribution of certain features within a given population.
Differences in functional groups and species richness for plant biomass accumulation was looked into to establish how they affect diversity and interaction with other global chance factors.
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A functional group is physiological, morphological, and ecological species identity. Species richness is the number of species in a community. The functional group is a set of species that share similar characteristics within a community.
What is plant biomass?Plant biomass refers to the weight of living plant material above and below a unit of ground surface area at a given point in that time.
Biomass is a plant based material that is used as fuel to produce heat.
The relationship between biomass and species richness in temperate vegetation is given in detail by hump-back response model.
Thus, number of species in a community is called species richness and the functional group is a set of species that share similar characteristics within a community.
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Expected frequency of CC genotype
Answer:
0.18
Explanation:
Question 23 (1 point)
Which below is NOT part of the lymphatic system?
a
spleen
b
bone marrow
C
lymph nodes
Od
tonsils
How could Flor explain why all three species share some body structures and have some differences? Why do only house geckos and Pacific gulls have two temporal holes in their skulls?
The similarities in the structure of the three species is due to their sharing a common ancestor while the differences is due to adaptation.
What is divergent evolution?Divergent evolution is evolution where individuals who shared a common ancient ancestor process to have differing structures due to differences in their habitats.
All three species that Flor observed having similar structures is because they had a common ancestor.
The species had differences because they evolved to adapt to their different environments.
Wall geckos and Pacific gulls have temporal holes in their skulls as adaptations to their habitat.
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The ______ carries urine from the kidney to the bladder, and the ______ carries urine from the bladder to the outside of the body.
The Ureter Carries urine from the kidney to the bladder, and the Urethra carries the urine to the outside
The urinary systemThe ureter carries urine from the kidney as a waste product obtained from the consumption of food and liquid substance to the bladder, which acts as a temporary storage of urine. When the bladder storage is saturated the urine is released to the outside of the body through the urethra.
Hence we can conclude that The Ureter Carries urine from the kidney to the bladder, and the Urethra takes the urine outside the body.
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Among the invertebrate phyla, phylum arthropoda is unique in possessing members that have.
Answer:
Wings
Explanation:
The most unique feature among phylum Arthropoda is that some of its members have wings. No other invertebrate has winged species!
The region of the stomach that empties into the duodenum is the.
Answer:
The pylorus
Explanation:
is the part of the stomach that connects to the small intestine. This region includes the pyloric sphincter, which is a thick ring of muscle that acts as a valve to control the emptying of stomach contents (chyme) into the duodenum (first part of the small intestine).
Answer:
The pylorus is the part of the stomach that connects to the small intestine. This region includes the pyloric sphincter, which is a thick ring of muscle that acts as a valve to control the emptying of stomach contents (chyme) into the duodenum (first part of the small intestine).
Explanation:
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A/an ____________________ is a structure in which male gametes develop.
An antheridium is a structure in which male gametes develop
During which phase of meiosis do the sister chromatids line up across from each other in the center of the cell?.
Answer:
Metaphase
Explanation:
During metaphase, each of the 46 chromosomes line up along the center of the cell at the metaphase plate.
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What is the difference between monocot and dicot cotyloden
and
What is rhe relationship between monocot seed and dicot seed
Answer: The names of these groups are derived from the number of cotyledons or seed leaves that the embryonic seedling has within its seed. A monocot, which is an abbreviation for monocotyledon, will have only one cotyledon, and a dicot, or dicotyledon, will have two cotyledons.
Explanation:
How does natural selection enable species to changes their body shape, appearance, and/or size over time? *
A) Individuals that are better adapted to their environment survive and reproduce.
B) Overproduction provides food for stronger members of the species.
C) Environmental changes kill weaker members of the species.
Answer:
A
Selective pressures( Predators, less food etc. ) will cause the less fit variation of a species to decrease in population, causing them not to be able to reproduce. The more fit variation would be able to reproduce more so that over time, the individuals in the species will have the features of the more fit variation.
Can someone please help me? :(
Answer:
B i think or C
Explanation:
Because in the way I am thinking it's B, "School cooks should be educated on allergies to peanuts." It makes the most sense
Answer: b
Explanation:
it can't be a since source 2 says "few people recognize..." which contradicts "students know what to do..."
it can't be c because there is no source comparing peanut allergies now vs. past.
it can't be d because you cannot infer this from the given data.
leaving us with b because since a majority of peanut allergies happen at school and not many know how to deal with an event with a peanut allergy, then teaching cooks about peanut allergies will help students in the case of an allergic reaction in school.
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What kind of compounds are formed by carbon
Answer:
Carbides: Carbides are binary compounds formed by carbon and another element with a lower electronegativity. Examples include Al 4 C 3, CaC 2, SiC, TiC, WC.
Carbon Halides: Carbon halides consist of carbon bonded to a halogen. Examples include carbon tetrachloride (CCl 4) and carbon tetraiodide (CI 4 ).
Carboranes: Carboranes are molecular clusters that contain both carbon and boron atoms. An example is H 2 C 2 B 10 H 10.
Explanation:
Answer:
Carbon Forms Covalent Bonds
This is because carbon typically bonds with elements which have a similar electronegativity. Examples of covalent bonds formed by carbon include carbon-carbon, Examples of compounds containing these bonds include methane, water, and carbon dioxide.
Explanation:
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How did both the redi and the pasteur experiment prove there was no such thing as spontaneous generation
Answer:
These experiments proved that there was no spontaneous generation, since the boiled broth if never reexposed to air, remained sterile.
Will the entire starch molecule be able to enter the cells of the digestive tract?
Particularly important dietary carbohydrates include starch and disaccharides such as lactose and sucrose. None of these molecules can be absorbed for the simple reason that they cannot cross cell membranes unaided and, unlike the situation for monosaccharides, there are no transporters to carry them across.
The carbon cycle refers to:
A. the mechanism by which carbon dioxide causes global warming.
B. the frequency of light energy that affects the rotational energy of carbon dioxide.
C. the oxidation of glucose to form carbon dioxide and water.
D. the movement of carbon through living organisms, the atmosphere, the sea, and the earth.
Answer:
the movement of carbon through living organisms, the atmosphere, the sea, and the earth.
Explanation:
The carbon cycle is nature's way of reusing carbon atoms which travel from the atmosphere into organisms in the Earth and then back into the atmosphere over & over again.
Most carbon is stored in rocks and sediments, while the rest is stored in the ocean, the atmosphere, and in living organisms.
Why is the countercurrent system of flow important for fishes?
Question: Why is the countercurrent system of flow important for fishes?
Explanation and answer: Fishes use a design called 'countercurrent oxygen exchange' to maximize the amount of oxygen that their blood can pick up. They achieve this by maximizing the amount of time their blood is exposed to water that has a higher oxygen level, even as the blood takes on more oxygen.
I hope this helped you a lot with your schoolwork.
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why did mammals evolved so quickly after the extinction of the dinosaurs
a --------- ----------- factor impacts large populations and are often caused by overpopulation for example completion for food water shelter
Answer:
One of the answers could be emigration.
During which phase of the cell cycle does the cytoplasm of a cell divide to form two daughter cells?.
Answer:
Telophase or in other words the final phase of mitosis
Explanation:
Use the drop-down menus to answer the questions about binary fission. binary fission is a form of reproduction. binary fission results in cells that are .
Binary fission is a form of agamous reproduction. The cells produce by binary fission are two, and the cells that are produced are identical.
What is binary fission?Binary fission is the division of the body into two identical bodies.
Binary fission is an agamous reproduction, in which the animals divide the cells into two cells and the second cell is called the daughter cell.
The single-celled animal reproduces by binary fission. Examples are hydra, bacteria, etc.
Thus, the correct options are 1. agamous reproduction, 2. Two, and 3. Identical cells.
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Just did the assignment
Explanation:
If a population is already well-adapted to its environment, will most mutations be helpful or harmful? Explain.
Most mutations will be helpful if a population is already well-adapted to its environment.
What is Mutation?This is defined as a change in the DNA sequence of organisms. These changes occur as a result of the ever changing environmental conditions.
When there is a high adaptability by the population, then it infers that the mutation is a helpful one.
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Photosynthesis is vital for maintaining levels of atmospheric oxygen. Please select the best answer from the choices provided T F.
Photosynthesis is a key determining process to regulate the level of atmospheric oxygen. This statement is true.
What do you mean by Photosynthesis?Photosynthesis may be defined as a process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar.
Without the process of photosynthesis, the evolution of oxygen can not be imagined. Photosynthesis takes carbon dioxide from the atmosphere, and in respect of this oxygen is liberated in our surroundings.
Therefore, Photosynthesis is a key determining process to regulate the level of atmospheric oxygen.
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What can influence the population growth of organisms?
Answer:
Population growth rate is affected by birth rates, death rates, immigration, and emigration. If a population is given unlimited amounts of food, moisture, and oxygen, and other environmental factors, it will show exponential growth.
Explanation:
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the food you eat supplies you with the ____ needed for you rbody to build new cells and r enew itself