Answer:
Radiometric dating methods
Explanation:
Absolute dating is the process of determining an age on a chronological or specified time scale in which events occurred in archaeology and geology. Absolute dating can be determined by using properties of the atoms that make up materials.
The most common method of absolute dating uses by geologists is radiometric dating methods which is based on the natural radioactive decay of certain elements such as potassium and carbon found in the rocks. By comparing the ratio of parent isotope with a known half-life to daughter product in the rock, the age of the rock can be determined.
The carbon-14 isotope is used in radiocarbon dating, but is only useful for measuring recently formed rocks in the geologic past. The decay of Potassium-40 isotope known as potassium-argon (K-Ar) method allows dating of materials that up to 1,000 billion years old.
Answer:
by dating the age of intrusions and extrusions near a sedimentary rock layer
Explanation:
got it right on the assighment
The eggs were placed in various solutions. What is the purpose of the vingear solution in this experiment
Answer:
When the egg was in a solution (vinegar, salt water, tap water) that had a higher concentration of water than was inside the egg's membrane water flowed into the egg. When the egg was in a solution (corn syrup) where the concentration of water was less than inside its own membrane the water flowed out of the egg.
Answer:
Hi how are you doing today Jasmine
What are 3 functions of epithelium?
Answer:
Functions of epithelial cells include secretion, selective absorption, protection, transcellular transport, and sensing.
Explanation:
Epithelial layers contain no blood vessels, so they must receive nourishment via diffusion of substances from the underlying connective tissue, through the basement membrane.
1- why dong you usually get sick from the exact same pathogen twice
2-if a pathogen mutated so it had different antigens, would your memory B and memory T cells recognize it?
please help this is due at 3pm
1: For example, rhinovirus has over 100 different serotypes. Now, the good news is that you can't get ill from the same virus serotype right after getting better, due to the fact that you'll have developed antibodies which help to protect your immune system for a little while.
2:Most children in the United States are now vaccinated against measles virus; before vaccination was widespread, most were naturally exposed to this virus and suffered from an acute, unpleasant, and potentially dangerous viral illness. Whether through vaccination or infection, children exposed to the virus acquire long-term protection from measles. The same is true of many other acute infectious diseases: this state of protection is a consequence of immunological memory.
The basis of immunological memory has been hard to explore experimentally. Although the phenomenon was first recorded by the ancient Greeks and has been exploited routinely in vaccination programs for over 200 years, it is just now becoming clear that memory reflects a persistent population of specialized memory cells that is independent of the continued persistence of the original antigen that induced them. This mechanism of maintaining memory is consistent with the finding that only individuals who were themselves previously exposed to a given infectious agent are immune, and that memory is not dependent on repeated exposure to infection as a result of contacts with other infected individuals. This was established by observations made on remote island populations, where a virus such as measles can cause an epidemic, infecting all people living on the island at that time, after which the virus disappears for many years. On reintroduction from outside the island, the virus does not affect the original population but causes disease in those people born since the first epidemic. This means that immunological memory need not be maintained by repeated exposure to infectious virus
Radio waves, infrared waves, visible light, and Xrays are all forms of energy
that travel as
a.mechanical waves
b.sound waves
c.electromagnetic waves
d.seismic waves
Answer:
the answer is c
Explanation:
Light is part of a spectrum of electromagnetic energy that includes radio waves, microwaves, infrared radiation, visible light, ultraviolet "light", x rays, and gamma rays. Electromagnetic energy travels as waves that vary in wavelength.
Fleas live on a cat and feed on the cat’s blood. The cat eats a bird outside in a rose garden. Which organism is a parasite in this scenario?
bird
cat
fleas
rose
Answer:
it fleas
Explanation:
because the cat just ate the bird and so more blood ( more blood for the flee ) so everytime the cat does this the flea will keep eating
Answer:
fleas
Explanation:
i got a 90% and i got it right.
Copies of chromosomes are called
platelets.
sister chromatids.
macrophages.
stem cells.
Need Help Due in 5 min: Earth Science
Answers:
hurricane
snowstorm
tornado
flooding
Answer: a snowstorm would occur
what are the 10 central themes of biology and can you explain them?
Answer:
1. Emergent Properties
2. The Cell
3. Heritable Information
4. Structure and Function
5. Environmental Interactions
6. Feedback and Regulation
7. Unity and Diversity
8. Evolution
9. Inquiry
10. Science, Technology, and Society
Explanation:
1. The fact that complex organisms derive from small, simple bases.
2. Basic unit of life
3. Found in dna of all living organisms, passed from generation to generation.
4. All parts of organisms serve a purpose. (heart pumps blood)
5. All organisms are involved with their surroundings (plants use sunlight for energy
6. Bodies give us feedback on whether or not things are safe for habitation. (its too hot or cold)
7. All organisms may differ in looks but we are made up of similar DNA
8. explains how organisms develop over decades
9. scientists search for new information
10. We learn about the world through biology.
The different themes of biology include emergent properties, the cell, heritable information, structure and function, interaction with the environment, regulation, unity and diversity, evolution, scientific inquiry, and science, technology, and society.
What are the different themes of Biology?A theme is an idea or a topic which is expanded in a discourse, discussion, etc. in literature, music, art, or any subject, discipline, etc.
The major themes of biology include:
Emergent Properties: These are critical attributes of biological systems, as the understanding of the individual parts alone is insufficient to understand or to predict the system behavior.
The Cell: It is the basic unit of life. Unit is capable of independent existence. Cells are studied to understand the functioning of organisms.
Heritable Information: This includes the transfer of information and genes from parents to offspring. This is included under genetics.
Structure/Function: This includes the structure and function study of living organisms.
Interaction with the Environment: This theme of biology includes the interaction of various living and non-living things with the environment.
Regulation: This theme involves the regulation of the biospheres of the planet.
Unity and Diversity
Evolution: This theme involves the evolution of different organisms over time which took place on this planet.
Scientific inquiry, Science, Technology, and Society
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which molecule is a product of photosynthesis
A.Carbon dioxide
B.water
C.sugar
D.nitrogen
Answer:
I will say the answer is either A or B
Explanation:
A student collects 100 seeds from a group of plants produced from the
same parent plants. Of the seeds collected, 80 are blue seeds, and 20 are
white seeds. The trait for seed color is controlled by one gene and
results in seeds with either a blue color or white color.
Which Punnett square of the parent plants' traits likely corresponds
with the 100 seeds collected?
Answer:
A
Explanation:
drag each label to the correct image identify the types of reproduction represented in the images
Please help brainliest, five star, thanks please helpppppppppp
Mike has a problem with his testosterone. He is unable to produce enough. Which will most likely be affected by his inability to produce testosterone? Select two options. urine production sperm production producing fluid to help sperm move appearance of secondary sex characteristics egg production egg movement to the uterus
Answer:
B(sperm production)
D(appearance of secondary sex characteristics)
Explanation:
Answer:
its b and d hope this help
Explanation:
O False
Question 4 (1 point)
Organisms with jointed appendages are found in the Phylum Arthropoda.
O True
O False
Answer:
True
Explanation:
(Arthropoda means jointed appendages)
Please help with Meiosis! Will give brainliest!!
List the phases for Meiosis I. ________________, __________________, _________________, ______________
List the phases for Meiosis II. ________________, __________________, _________________, ______________
During prophase I the chromosomes __________________ and become ______________________.
Chromosomes that are the same size and have the same genes are called __________________ _____________
Each half of a replicated chromosome is called a ____________________________________________________
Sister chromatids of a chromosome are identical _______________________________.
Answer:
List the phases for Meiosis I: Prophase I, Metaphase I, Anaphase I, Telephase I
List the phases for Meiosis II: Prophase II, Metaphase II, Anaphase II, Telephase II
During prophase I the chromosomes coil and become shorter.
Chromosomes that are the same size and have the same genes are called homologous chromosomes.
Each half of a replicated chromosome is called a chromatid.
Sister chromatids of a chromosome are identical copies of the same chromosome.
Explanation: I hope I helped and have a great day! ^-^
explain how darwin's journey to the galapagos islands contributed to his creation of the theory of evolutions.
Explanation:
During his visit to the islands, Darwin noted that the unique creatures were similar from island to island, but perfectly adapted to their environments which led him to ponder the origin of the islands' inhabitants.
Among those that struck Darwin so greatly were the finches that are now named in his honor. Darwin would later base some of his thought from the supposing that these finches were all descendents of the same lineage.
Read each of the answers below carefully: Which statement best describes the cell cycle? a. Cells grow and develop during interphase. Cells reproduce during the mitotic phase. b. Cells grow and develop during the mitotic phase. Cells reproduce during interphase. c. The nucleus of the cell divides during interphase. The cytoplasm of a cell divides during the mitotic phase. d. The nucleus of the cell divides during the mitotic phase. The cytoplasm of a cell divides during interphase.
Answer:
a. Cells grow and develop during interphase. Cells reproduce during the mitotic phase.
Explanation:
Cell cycle refers to the series of processes that leads to the growth/development and division of a cell. The cell cycle uses MITOSIS for cell growth. Mitosis comprises of two distinct stages namely: INTERPHASE AND MITOTIC PHASE. The interphase is referred to as the resting phase of the cell in which the cell grows and develops.
On the other hand, MITOTIC PHASE is the stage where the actual division of the nucleus (karyokinesis) and cytoplasm (cytokinesis) generally called CELL DIVISION occurs. Therefore, the cell reproduces i.e. one cell forming two, in the mitotic phase.
The statement best describes the cell cycle - a. Cells grow and develop during interphase. Cells reproduce during the mitotic phase.
Cell cyclethe series of processes that result in the growth and development and division of a cell.The cell cycle uses MITOSIS for cell growth. there are two distinct stages namely:INTERPHASE is referred to as the resting phase of the cell in which the cell grows and develops.MITOTIC PHASEis the stage where the actual division of the nucleus (karyokinesis)and division of cytoplasm (cytokinesis)Thus, The statement best describes the cell cycle - a. Cells grow and develop during interphase. Cells reproduce during the mitotic phase.
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Light waves transmit energy and have direction. Light wave energy can
travel
a. through liquids only
b. as vibrations
c. through liquids and gases only
d. through empty space
someone please help me
Answer:
a. through liquids only
Answer:
the answer is d
Explanation:
because because light waves require a medium space is one of them because space is not so empty if it was we wouldn't be able to see the lights of the Stars there are far far away.
Brackish water can be found in which of the following ecosystems?
a. coral reefs
b. mangrove swamps
c. polar regions
d. deep sea
Answer:
The answer would be B. Mangrove Swamps
Explanation:
Brackish water is when freshwater meets with sewer water or salty water.
Brackish water can be found in the mangrove swamps ecosystem.
They are marked by halophytic trees, shrubs and different flora thriving in saline to saline tidal waters.
What is the mangrove swamps ecosystem?
Mangrove forests, also named mangrove swamps, mangrove shrubs or trees, are formative wetlands that appear inshore intertidal zones. Mangrove forests grow mainly in equatorial and subtropical spaces because mangrove trees cannot resist freezing .
It is distinguished by such qualities as a damp climate, saline habitat, waterlogged soil or sludgy soil.
Thus, Brackish water can be found in the mangrove swamps ecosystem.
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Look at the photo. Explain how it shows both an individual and a community
What is the function of the flower in plant reproduction?
disperses seeds
captures sunlight
protects the stem
attracts pollinators
Answer:
attracts pollinators
whats the difference between asexual and sexual reproduction???
Answer:
Sexual reproduction is the reproduction of 2 parents father and mother this is like most mammals,this is sexual. Asexual is the reproduction of 1 parent this is like many mushrooms and plants that include budding sporulation and others.
the variety of ecosystems in a given area is called
Answer:
ecosystem diversity. the variety of ecosystems within a given region.
Explanation:
The variety of ecosystems in a given area is called biodiversity, it is a variety of ecosystem species and genes in the world.
What is biodiversity?The variety of plants, fungi, animals, and even microorganisms like bacteria that make up our natural world are all examples of the biodiversity that can be found in a given location.
To preserve equilibrium and support life, each of these species and organisms collaborate in ecosystems, much like a complex web.
The variety and variability of life on Earth is referred to as biodiversity or biological diversity. A measure of variation at the genetic, species, and ecosystem levels is called biodiversity.
Therefore, the variety of ecosystems in a given area is called biodiversity.
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Which statement describes a cell part needed by the cell to make proteins?
Answer: The nucleus contains DNA.
What might occur if humans reproduced through the process of mitosis?
A Many chromosomes would not be divided during cell division.
B Parents would produce more offspring.
C There would be the likelihood of an increase in genetic diversity.
D Inherited diseases would be passed down to all generations. HELPPPPP
Answer:
D
Explanation:
Mitosis creates genetically identical clones
Mitosis divides a cell into two identical daughter cells. Therefore, option (D) Inherited disease being passed down to all generations is correct.
What is mitosis?Mitosis is the process of cell division that results in the production of new cells, which are then used for growth, repair, and the general replacement of older cells. A somatic cell will undergo this process when it has to reproduce and will end up with two new cells that are an exact copy of the first. The six steps of mitosis are completed by human somatic cells in between half an hour to one hours, depending on the type of tissue that is being duplicated.
Because there is little genetic variation as a result of mitosis, each generation is at risk for the same diseases and disorders. This is one of the drawbacks of the process.
Therefore, option (D) is correct.
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In the Carbon cycle, what must NOT happen to your dead organic material to have it
become fossil fuel?
Answer:
Decompose
Explanation:
If the material decomposes the stored energy will be released.
What are the roles protein plays on living system? Explain it with 3 to 5 sentences ( THANK YOU BTW)
The author suggests inertia is most often experienced
A. when planets orbit
B. in moving and stopping vehicles
C. at amusement parks
D. when watching rockets launch
Answer:
I think A when planets orbit
Answer this pls!!!!!!!!!!!!
Answer:
sea anenome
Explanation:
It is sea anenomes because they provide shelter for sea creatures and they vary between hard and spft bodies
Why does the cell copy the DNA into mRNA instead of using the DNA itself to produce proteins?
Answer:
DNA is inside the cell nucleus. Transcribing this code to mRNA allows the information to leave the cell nucleus and produce proteins in the cytoplasm.
Explanation:
Answer:
magic mo kaya
Explanation:
hahahgahhaha joke lang po yan pero sorry hirap kasi
It is not the number of different nucleotides, but the ________________ that is important in the ability of DNA to code for all the variability of organisms.
I'll mark brainlest
Answer:
discupa eu não sei
uma bela noite abençoe