Radiocarbon dating uses a radioactive isotope of the element carbon to determine the ages of old objects.
Differentiate between cell mass and cell number
Answer:
Measurement (Count) of Cell Numbers:
1. Breed Method:
A known volume of microbial cell suspension (0.01 ml) is spread uniformly over a glass slide covering a specific area (1 sq. cm). The smear is then fixed by heating, stained, examined under oil immersion lens, and the cells are counted.
Customarily, cells in a few microscopic fields are counted because it is not possible to scan the entire area of smear. The counting of total number of cells is determined by calculating the total number of microscopic fields per one square cm. area of the smear.
Answer:
cell mass: The total mass of all the cellular elements in the body which constitute all the metabolically active tissue of the body
Cell number: The sequence of numbers or characters, that when dialed, connects to a particular cellular telephone
Explanation:
Please help me thank you
Answer:
The punnet square would look like this.
R R
R RR RR
B RB RB
Anthropologists have been studying the role of soybean curd andrelated products in the culture of Hong Kong. The researchers interviewpeople about how frequently they eat soybean products, where they eatthem (at home or in restaurants), and during what time of day they eatthem. The researchers also ask people about how they preparesoybean products, where they obtain soybean products, and any beliefsthey might have about soybean products (such as their nutritionalvalue). The data are used to assess the role of soybean products in theculture. The researchers are also considering how their findings relateto global soybean consumption patterns.
1. What is the primary field of anthropology addressed in this research?a. Linguistic anthropologyb. Archaeologyc. Biological anthropologyd. Cultural anthropology2. Which field of anthropology (other than the one you indicated above) is most related to this research?a. Biological Anthropologyb. Archaeologyc. Linguistic Anthropologyd. Cultural Anthropologye. All fields of Anthropology are related to this topic3. How might this research contribute to a comparative anthropological approach?a. This research could be used to compare quinoa consumption in other parts of the world.b. This research could be used to compare biological adaptations across Bolivia.c. This research could be used to compare quinoa consumption in other primate species.d. This research could be used to compare quinoa DNA to other plants.
Answer:
1.) Cultural Anthropology
2.) Biological Anthropology
3.) The research could be used to compare quinoa consumption in other parts of the world.
Explanation:
Anthropology is a scientific field that studies humans. It studies humans all over the world with respect to their behaviors and cultures in both past and present eras. Anthropology is divided into four major types: Cultural, Biological, Linguistic and archaeological.
1.) Because this research is towards the role of soybean and related products in Hing Kong, we can confidently say that it falls under the cultural aspect of anthropology which focuses on the study of differences in cultures among humans.
2.) Considering the fact that the research deals with a biological product (soybean) that has effects on humans, then biological anthropology is the most closely related field.
3.) The researchers intend to relate their findings from this research to global soybean and other related products consumption pattern. Therefore, this research could be used to compare quinoa consumption in other parts of the world.
Answer:
e 2020
Explanation:
Historical significase
One theory of early life on Earth states that the first life forms did not use oxygen for respiration and were unable to make their own food. Based on this theory, which types of organisms were most likely present? *
A. aerobic, autotrophic bacteria
B. anaerobic, autotrophic bacteria
C. aerobic, heterotrophic bacteria
D. anaerobic, heterotrophic bacteria
The theory of primitive life on Earth is fascinating, there are countless scientists who try to explain how life began on Earth, but to be able to answer how the first living beings were we need to know that.....
Oparin and Haldane hypothesis
The most widely accepted hypothesis about the origin of life today is the Oparin and Haldane hypothesis. According to this idea, the primitive Earth would be constituted by
AmmoniaHydrogenMethane and Water vapor,which are constantly expelled by volcanic activities. The condensation of this water vapor gave rise to a cycle of rains, as these, upon reaching the still hot surface of the Earth, evaporate again, thus initiating a new cycle.
Through the action of the sun's ultraviolet radiation and constant electrical discharges, the elements present in the atmosphere began to react, giving rise to the first organic compounds, called amino acids. The rains carried these compounds to the primitive oceans, which formed when the Earth's surface cooled, allowing water to accumulate on the surface.
In primitive oceans, these amino acids joined together, forming protein-like compounds (proteinoids), and then, after further reactions, these gave rise to coacervates. These became more stable and complex, controlling their own chemical reactions and being able to self-duplicate, thus giving rise to the first living beings.
Heterotrophic and autotrophic hypotheses
Some authors believe that the first organisms would be heterotrophs. This was due to the fact that the first organisms were simple, lacking the structure to carry out a more complex biochemical process to obtain food, for example, photosynthesis. Thus, these organisms fed on simple organic matter, presenting as the end product of this process carbon dioxide (CO2) and alcohol (C2H5OH), that is, the first living organisms would be fermentors.
With this information, we can say that the first living being on the planet was anaerobic, heterotrophic bacteria.
D. anaerobic, heterotrophic bacteria
There have always been many theories about the origin of life on the planet, but this is the most acceptable among scientists, but it is necessary to know that they are not yet fully proven, so they continue as a theory.
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what is the base-pair rule for a DNA strand matching an RNA strand?
Explanation:
The base pairing of guanine (G) and cytosine (C) is just the same in DNA and RNA. So in RNA the important base pairs are: adenine (A) pairs with uracil (U); Guanine G() pairs with cytosine (C).
The Chargaff rule only holds true for DNA. Base pairing doesn't take place since RNA is single-stranded. Consider a DNA strand.
What make base pair unique in DNA and RNA?Compare the two DNA strands' base-pair rules to this one. Since uracil is absent from DNA, T and A complement one another. In contrast, T bonds with A and A bonds with U in a DNA/RNA match.
Important: It serves as the foundation for base pairing. This rule can be used to both determine the DNA strand length and if a base is present in the molecule.
Adenine and thymine are always equal, and cytosine and guanine are also always equal, allowing us to calculate the percentages of each base.
It assists in figuring out the makeup and structure of DNA in various species. It is constant within a species.
Therefore, the base-pair rule for a DNA strand matching an RNA strand.
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Which of the following is not a property of persistent organic pollutants (POPs)?
a.
They have carbon-based molecular structures.
b.
They do not break down easily in the environment.
c.
They are insoluble in fat.
d.
They are polluting and toxic.
Answer: C
Explanation:
got a 90 on the quiz but correct if wrong
Determine if it's Asexual or Sexual: The DNA of a bacterium doubles. The cell divides in half in a process called fission. This process continues every 20 minutes until food for the bacteria becomes scarce. The population levels off.
Answer:
Asextual
Explanation:Because it divides
During the summer months, glaciers at the poles melt, delivering fresh water to the ocean. What does this do to salinity?
Question 3 options:
lowers salinity
raises salinity
it does not change the salinity
Answer:
Im almost positive its A.
Explanation:
if im wrong sorry
Answer:
lowers salinity i think o am correct
What alleles are inside the grid box
Answer:
In most sexually reproducing organisms, each individual has two alleles for each gene (one from each parent). This pair of alleles is called a genotype and determines the organism's appearance, or phenotype.
Which deep-water body is a unique feature of the Southern Ocean?
HELPPPPPPPPPPPPPPPPPPP PLSZSSSSSSSS!!!!!!!!!!!
Answer:
The Southern Ocean, also known as the Antarctic Ocean or the Austral Ocean, comprises the southernmost waters of the World Ocean, generally taken to be south of 60° S latitude and encircling Antarctica. As such, it is regarded as the second-smallest of the five principal oceanic divisions: smaller than the Pacific, Atlantic, and Indian oceans but larger than the Arctic Ocean. Over the past 30 years, the Southern Ocean has been subject to rapid climate change, which has led to changes in the marine ecosystem.
More to the Question:
The (blank) water is a saline, cold, and dense body of water lying deep in the Southern Ocean, traveling northward.
Antarctic Bottom
Explanation:
I don't know if this will help, Hope it does.
Sorry :( if it does not
There is a moth in England called the peppered moth. Before Britain's industrial revolution, these moths were usually salt and pepper colored. Because of their coloring, they blended in well with the tree trunks on which they tended to rest. The coloring helped them hide from the birds that ate them. During the British industrial revolution, industry expelled a lot of soot from the burning of coal into the environment. This soot darkened the tree trunks, and it was noted that black-colored moths were becoming predominant. The idea is that with soot in the environment, black-colored moths fared better than light-colored moths. There is some debate as to whether this is actually the case or not, but for the sake of this question, let's assume it is. In your own words, explain the concepts from the four observations discussed in 12.2 using the moth as an example. In other words, how does the moth illustrate the first observation, the second observation, etc.
Answer:
The correct answer is - natural selection in moths.
Explanation:
This is an event of historical Industrial melanism, an event caused by the process of natural selection. Due to this event, the evolution of dark body colors in moth species that present in such habitats become black by industrial soot.
Peppered moths in the UK were pale grey before the revolution of industries, But after the habitat become polluted with soot from coal‐fired industries, melanic snd become numerous and spread to other regions.
After the century the pollution comes down and the pale phenotype becomes the predominant form.
Desiccation resistant spores, protective and complex reproductive organs, and embryos nourished by parental tissues enable land plants to ______.
Answer:
to adapt to dryland conditions
Explanation:
The main groups of land plants are vascular plants and they have developed diverse adaptations to survive on land, especially in climatic zones where drought and high temperatures are common. Some of the most important plant adaptations to land ecosystems include, among others, the development of a cuticle to prevent water loss, stomata capable of regulating water evaporation, desiccation-resistant spores coated in sporopollenium polymer, etc. Moreover, in seed plants, which are considered to be the most evolved vascular plants, the endosperm tissue produced inside the seeds is nourished by the parent sporophyte during the first stages of plant development.
Desiccation resistant spores, protective and complex
reproductive organs, and embryos nourished by parental
tissues enable land plants to adapt to dry conditions.
What is Dessication?
This is the process in which a substance dries up as a result of
loss of moisture.
In plants, resistant spores, protective and complex
reproductive organs, and embryos nourished by parental
tissues which helps to prevent desiccation and ensure that the
seeds survive harsh conditions thereby facilitating
reproduction.
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The...........is also known as the tympanum.
1)eardrum
2)stapes
3)cochlea
4)malleus
Answer and I will give you brainiliest
Answer:
1
djdhdbbdbdbsbdbdbsb
which list shows the phase of mitosis in the correct order
Answer: The answer is B. prophase, metaphase, anaphase, telophase
Explanation:
help me out with these please
:):)
Answer: i would say b for the first one!
2nd pic: i would say c!
3rd pic: b or c!
Explanation:
omg this is what i think they are! sorry if its wrong!
Answer:
1st: b
2nd: c
3rd: b
I hope this helped!~ Have a great day~
~Keiji❤
Please remember to eat, you are valid and someone loves you~!
What was difficult about measuring the 3x5 card? Why?
Answer:
can you give me some answers
Explanation:
for every girl
BBB
GG
BBB
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>
GGGG
BBBB
GGGG
GGBB
GGBBBBBB
GGGGGB
GGG B
Reset
Next Question
what
Explanation:
what you talking about
which single factor would most likely account for this trend?
Answer:
muscles?
Explanation:
what trend? can explain or this not serious Question?
List three properties of water that you know about from everyday living.
Answer:
heat, gas(condensation), Adhesion
Please Help Me ASAP.
Answer:
The universe
Explanation:
When your body begins to get too hot, it begins to sweat in order to try and cool itself down in order to stay at a temp of around 98 degress. This is an example of what?
1. Cellular Respiration
2. Thermodynamics
3. Homeostasis
Answer:
it calms down and gets to get cool again
Answer:
2
Explanation:
thermoregulation is process that allows your body to maintain its core internal temperature
what kind of animals that has secrete chemicals to defend themselves??
Answer:
sea hares, cuttlefish, squid and octopuses
Explanation:
They give themselves a last chance to escape by distracting their attackers,; to do this, they eject a mixture of chemicals, otherwise confuse predators.
Hope that helps
The information from the brain travels down to the effector site through
A) Sensorial neuron
B) Interneuron
C) Motor neuron
D) Oligodendrocyte
Answer:
Motor neuron
Explanation:
Motor Neurons (effector neurons) relay information from the CNS to other organs terminating at the effectors. It takes the information from the brain to the effector.
Hope it helped!!!
Which model represents a DNA molecule?
Answer: The answer is D because the way they line up!!
Explanation:
The model that gives a true representation of a DNA molecule would be the 4th model.
What is the structure of DNA?According to Watson and Crick, the DNA is a double strand molecule with each strand twisting around one another to form a ladder-like, double helix structure.
Also, there is a complementarity of nucleotide bases such that Adenine (A) always pairs with Thymine (T) while Guanine (G) always pairs with Cytosine (C).
Thus, model 4 ticks all the characteristics of a typical DNA molecule.
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in what part of the cell cycle is DNA replicate
Answer:
Explanation:
S phase
The S phase of a cell cycle occurs during interphase, before mitosis or meiosis, and is responsible for the synthesis or replication of DNA.
Answer:
S phase, S phase is the period during which DNA replication occurs.
What are the effects on the ecosystem and what is being done to help.
Answer:
Climate change not only affects ecosystems and species directly, it also interacts with other human stressors such as development. Although some stressors cause only minor impacts when acting alone, their cumulative impact may lead to dramatic ecological changes.
Explanation:
Answer and I will give you brainiliest
Heeeeelp please
1. Suppose you lived over 100 years ago and you had a whole bowl of
fresh milk but only one cup of yogurt left. Describe how you might
make more yogurt?
Answer:
Lactic Acid Fermentation
Explanation:
Lactic acid fermentation is a metabolic process by which glucose or other six-carbon sugars are converted into cellular energy and the metabolite lactate, which is lactic acid in solution. Lactate, which is just the deprotonated form of lactic acid, gives the process its name. The bacteria that make yogurt carry out lactic acid fermentation, as do the red blood cells in your body, which don't have mitochondria and thus can't perform cellular respiration.
hope this helps have a nice day
Which of the following best illustrates a natural process acting as a constructive force?
A.
A river eroding soil during a flood.
B.
Acid rain breaking down the surface of a rock.
C.
A glacier weathering a mountainside.
D.
Wind depositing sand to build up sand dunes.
Answer:
D
Explanation:
because wind is depositing sand to build
Wind depositing sand to build up sand dunes best illustrates a natural process acting as a constructive force. Therefore, the correct option is D.
What is a constructive force?Constructive forces are the forces that are responsible for the formation of new landforms on the surface of the earth, such as deposition, earthquake, volcanoes etc.
Wind depositing sand to build up sand dunes is the natural process depicting the constructive force because sand dunes are formed by constructive forces that add sediment to an area, in this case, wind depositing sand.
Option A is incorrect because river erosion is a destructive force that wears away soil and rock, rather than building it up. Option B and option C are also destructive forces. Therefore, the correct option is D.
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Can’t roots be eaten as food? True or false.
Answer:
false
Explanation:
hope dis helps
Answer:
true, people have been eating roots for years
Hope this helps!!!
plz mark brainliest
Explanation: