Answer:
Literally, it is the waste product of cyanobacteria, also known as blue-green algae.
EXPLANATION
Explanation:
Between two to three billion years ago, Earth's atmosphere started changing.
Organisms living then were doing so anaerobically (without oxygen), but there was a gradual build up of oxygen in the atmosphere - the reason for this, as well as for the percentage of oxygen stabilising at around 21% is still unclear.
What we do know is that tiny organisms known as cyanobacteria (or blue-green algae) would photosynthesise carbohydrates for their nutrition and growth using sunlight, water, and carbon dioxide.
The waste product of photosynthesis, till today, is oxygen.
Over time, this oxygen increased till it reached the levels that we experience today.
The chloroplasts in today's plants are symbiotic cyanobacteria that continue the same process started billions of years ago.
A human bone marrow cell in the prophase stage of mitosis contains 46 chromosomes. Therefore, there are a total of __________ sister chromatids in this cell.
a. 23.
b. 46.
c. 23 or 46, depending on whether you look at the beginning or end of prophase.
d. 46 or 92, depending on the portion of prophase examined.
e. 92.
Answer:
The answer is 92 which is E
Explanation:
Because I said so
The aromatic oils of chaparral shrubs _______. A. Promote wildfires b. Make many plants flavorful cooking herbs c. Help shrubs eliminate their competitors d. All of the above Please select the best answer from the choices provided A B C D.
Answer:
B. make many plants flavorful coking herb. (I hope it's right..)
Explanation:
teacher said so..
Answer:
D. All of the Above
Explanation:
Got it right on Edge 2020. Hope this helps :)
Label the diagram below. 1 2 3 4 5 6 7
Answer:
Need more information.
Explanation:
Put the rest of the question in the comments and I am happy to help!
Fungi often live in close association with other organisms in a nondetrimental fashion known as ______.
Answer:
ecosystem
Explanation:
because jt also needs other organisms for survival
What is the end result of the eukaryotic cell cycle?
no parent cells and two daughter cells
one parent cell and two daughter cells
two parent cells and one daughter cell
one parent cell and one daughter cell
No parent cells and two daughter cells.
Answer:
The end result of the eukaryotic cell cycle is an increase in cell number.
Answer:
A. no parent cells and two daughter cells
Explanation:
Organisms that obtain and ingest organic molecules for their nutrition are classified as.
Answer:
Also refered to as consumers, heterotrophs are organisms that obtain their energy (nutrition) from organic compounds/materials. In other words, they are organisms that are unable to produce their own food (unlike autotrophs) and therefore have to consume/ingest organic compounds as a source of energy.
Energy from the sun causes water to evaporate from the land and from bodies of water. As this water vapor moves high into the air, the surrounding air cools it, causing it to condense and form ________________. *
a.runoff
b.evaporation
c.clouds
d.groundwater
Answer:
c. Clouds
Explanation:
It is the process called as condensation. Condensation is when the water vapor moves up to from clouds.
Explain the flow of information from DNA to RNA to proteins. What occurs at each stage of this pathway?.
Answer:
Adenine, thymine, cytosine and guanine are the 4 dna protiens, when they are being translated to RNA thymine is replaced with uracil, the now converted strands of rna clump together as animno acids and code for proteins
Explanation:
In humans, having dimples in the cheeks is a dominant trait. If a child has dimples but only one of her parents does, what are the genotypes of her parents?.
Question 1 of 10
Nucleic acids and carbohydrates are both types of what?
A. Proteins
B. Macromolecules
C. Atoms
D. Elements
SUBMIT
Answer:
the answer is B: macromolecules
:)
Explanation:
Which carbohydrate is found in the cell walls of plants.
How is a phylogenetic tree similar to a dichotomous key.
Answer: Phylogenetic trees are similar to the dichotomous keys because they used for identification and are artificial.
Answer:
Both focus on illustrating taxonomic relationships between organisms.
Explanation:
this is the correct answer
Which agricultural practices result in methane emission?
Agricultural sources include manure pits and cow burping from “enteric fermentation,” which results from the digestive process of cattle.
What do you mean by enteric fermentation?Enteric fermentation is a digestive process by which carbohydrates are broken down by microorganisms into simple molecules for absorption into the bloodstream of an animal.
Enteric fermentation is a natural part of the digestive process in ruminant animals such as cattle, sheep, goats, and buffalo. Microbes in the digestive tract, or rumen, decompose and ferment food, producing methane as a by-product.
Enteric fermentation occurs when anaerobic microbes, called methanogens, decompose and ferment food present in the animal's digestive tract producing compounds that the animal host then absorbs.
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#SPJ2
Question, what are Earth's major systems?
Answer:
geosphere (solid and molten rock, soil, and sediments), the hydrosphere (water and ice), the atmosphere (air), and the biosphere (living things, including humans).
Explanation:
In order to study genetic mutations, scientists must study genetic material. Which statement describes the genetic material scientists are most likely studying?.
What structural feature makes the 20 common amino acids different from one another?.
In 1978, scientists studied how the fitness of marine sticklebacks would be affected if they were introduced into a freshwater environment. They collected 90 male and 90 female sticklebacks from a marine population and 10 male and 10 female sticklebacks from a freshwater population. The 200 sticklebacks were introduced into a freshwater environment that had no stickleback fish previously.
Recently a scientist decided to repeat this study, but relocated a population of sticklebacks from a freshwater environment into a marine environment. Which of the following best predicts how the frequency of the allele would change over time if a population of sticklebacks from a freshwater environment was placed into a marine environment?
The frequency of alleles in the population started low and continued to increase over time.
What is frequency of alleles?The frequency of alleles refers to the ratio of the number of times an allele occurs to the copies of all the alleles at that particular genetic locus in the given population.
We can see that the sticklebacks had a greater number of those introduced from marine to fresh water hence of the 200 sticklebacks, the frequency of alleles in the population started low and continued to increase over time.
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Which of the following is an example of a nonspecific immune response? I. White blood cells that invade the area of a cut in the skin II. An injury triggers mast cells to release histamine, causing inflammation III. Killer T-cells destroy pathogens by recognizing proteins on cell surfaces.
Nonspecific is the innate immune response that is present since birth. White blood cells and mast cells are examples of non-specific immunity.
What is a nonspecific immune response?The non-specific immune response is the immunity present in the child from his/her birth and is a generalized response that employs white blood cells and mast cells for conferring the pathogens.
It is innate immunity that protects from the invasion of pathogens and provides the first line of defence by forming barriers.
It includes the invasion of the white blood cells in the area of any cut or injury or the release of the histamine from the mast cells in an injured area for the inflammation pathway.
Therefore, the statement I about white cells and II about mast cells are examples of the non-specific immune response.
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Strawberry jelly is a very strong solution of sugar. By contrast the cytoplasm in bacteria is a much weaker solution. The cell wall of bacteria is made up of a PARTIALLY permeable membrane. Would water flow from the microbe to the jam, or from the jam to the microbe by osmosis? Explain
Since the concentration of the jelly is higher than the concentration of the bacterial cytoplasm, water would flow from the microbe to the jam by osmosis.
What is Osmosis?Osmosis is the movement of water molecules from a region of low solute concentration to a region of high solute concentration through a semi-permeable membrane.
The strawberry jelly is a stronger solution than the bacterial cytoplasm.
Therefore, water would flow from the microbe to the jam by osmosis.
Learn more about osmosis at: https://brainly.com/question/3643085
how climate change could present an advantage or a disadvantage for the invasive species.
Answer:
it could kill off the invasive species but then you would have to worry about your native species too or it can all work in its favor meaning it doesn't effect the invasive species at all and only kills the native species
Explanation:
What do you think the hardest part of measuring the growth of a forest would be? Explain your answer.
Answer:
You can measure the growth of individual trees over time by measuring their diameter. ... Trees tend to grow irregularly at the base, so to determine a more accurate measure of diameter, foresters will measure the diameter of the tree at 4.5 feet above the ground
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Using a Biltmore stick to gauge height
Tracking Changes to Your Trees and Woods: Measuring growth
September 4, 2014RecreationKris Tiles
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In previous posts, we recommended that landowners get out into their woods to keep an eye on any changes that might be taking place, whether that be changes to the health of your trees or boundary problems. We also suggested you keep track of physical changes to your trees by watching them grow and change over time. First we gave you some tools to identify the trees in your woods. This month’s post will introduce ways you can measure the growth of individual trees.
You can measure the growth of individual trees over time by measuring their diameter. Many of us learned to count the rings of a tree to determine how old they are. The other secret in the rings of our trees is how wide they are. Generally, healthy, not crowded trees will put on more growth in diameter over time; thus, the rings will be wider when they are healthy. If you are astute, you may be asking how in the heck you measure the diameter of solid wood. That is where a handy tool comes into play, called the diameter tape. With this tool, you are technically using the circumference of the tree, and the number on the tape has markings that indicate the diameter (circumference divided by Pi (3.14)). You can purchase a diameter tape (D-tape) from forestry suppliers, or you can make your own using a simple length of rope or ribbon using the method shown in this publication . Trees tend to grow irregularly at the base, so to determine a more accurate measure of diameter, foresters will measure the diameter of the tree at 4.5 feet above the ground. When you record the diameter of trees, you can follow the growth of those trees over time, and you can calculate other important measures of your woods. As a reminder, healthy trees will grow faster (and fatter) in diameter each year than trees that are crowded and unhealthy.
A fire that happens in nurture areas
Answer:
i don't know if u meant nature but the answer is wildfire
suzanne has type a- blood. which blood type could she receive
Answer:
Only O- and A-
When the government imposes a binding price floor, it causes.
The imposition of price by the government causes a surplus of goods to accumulate in the supply chain.
What are goods and services?Goods and services are those things that we exchange our money for. A typical example is what happens at the grocery store. You exchange your money for grains.
When the government imposes a binding price floor, it causes a surplus of goods to accumulate in the supply chain.
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When the pressure in the ventricles becomes lower than the pressure in the atria, __________.
Answer:hey
Explanation:
When the pressure in the ventricles becomes lower than the pressure in the atria... the atrioventricular valves open
As of 2015, how many accredited anesthesiology assistant graduate training programs are there in the us?.
As of 2015, there are twelve (12) accredited anesthesiology assistant graduate training programs in the USA. These programs form excellent healthcare professionals.
Anesthesiology and healthcareAnesthesiology is a branch of medicine associated with the healthcare of the patients/clients before and after a particular surgery.
Anesthesiology is fundamental in healthcare in order to achieve the wellbeing state of patients.
Anesthesiology not only includes anesthesia, but also intensive care, critical emergency situations, and pain medicine.
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For each sequence of DNA is shown. Write the complementary RNA sequence underneath the letters, then use the codon chart to determine the amino acid sequence:
DNA → T A C C A T G G A A T T A C T
RNA →
Amino Acids →
DNA → T T C A A T G G T C T A G G G
RNA →
Amino Acids →
DNA → A C A T T T C A G A C C G T C
RNA →
Amino Acids →
Which enzyme is involved in the “part A” image? What is it doing?
Answer:
Enzyme activity is measured in units which indicate the rate of reaction catalysed by that enzyme expressed as micromoles of substrate transformed (or product formed) per minute.
2. Explain why photosynthesis is needed for respiration and vice versa. Provide a
specific example to support your answer.
Answer:
Explanation:
Photosynthesis uses carbon dioxide to create oxygen in the atmosphere. Oxygen is what we breathe. We do a process called cellular respiration. This means we breathe in oxygen and breathe out carbon dioxide. Plants use this carbon dioxide to do photosynthesis. It is a never-ending cycle.
For example, a bunny breathes out carbon dioxide. The plant takes carbon dioxide in and gives out oxygen. The bunny breathes in the oxygen and then again breathes out the carbon dioxide.
Did the results of the cross match your prediction? If not, why do you think that was the case?