Answer:
Thylakoids
Explanation:
proteins in the thylakoid membrane organize chlorophyll and other pigments into clusters known as photosystems. And are the light-collecting units of the chlorophast.
Which of the following best shows the process of evolution?
O A lizard's color becomes brown as it sits on a log
O A bear goes into hibernation
O A plant loses its leaves in a drought
O A population of mosquitoes develops resistance to a pesticide
Answer:
A population of mosquitoes develops resistance to a pesticide
Explanation:
Evolution can be defined as the way the characteristics of a species change over several generations. This process relies on natural selection - a mechanism in which individuals that are better adapted to their environment survive and reproduce most successfully.
A population of mosquitoes developing resistance to a pesticide is an example of adaptation. This is how mosquitoes become adapted to their environment and increase their chances of survival. Eventually, most of the mosquitoes will be resistant thanks to natural selection. This is how mosquitoes evolve.
This is why the fourth option is the correct one.
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
The air in the thermosphere is composed of atoms of _____ that are very far apart from each other.
Answer:
Explanation:
In the upper thermosphere, atomic oxygen (O), atomic nitrogen (N), and helium (He) are the main components of air.
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.
drag each label to the correct image identify the types of reproduction represented in the images
As you walk to physics class, you start out at a speed of 2 m/s, for a time of 120 seconds (you’re really excited to get to class). Then you see your friend and slow down to a speed of 0.5m/s for 30 seconds. You stop at your locker for 40 seconds (a speed of 0 m/s). You realize that you are about to be late so you hurry to class at a speed of 1 m/s and get to class just as the bell rings (4 minutes after your trip started). How far did you travel total?
Answer:
The total travelled distance is [tex]51065 \mathrm{~m}[/tex]
Explanation:
• Speed, time and distance is one of the most common and important topics in the Mathematics or Quant section.
• Calculate total speed;
[tex]\therefore \text { Total Speed }=2+0.5+0.0+1=3.5 \mathrm{~m} / \mathrm{sec}[/tex]
• Calculate total time taken;
[tex]\therefore \text { Total time taken }=120+30+40+14400=14590 \mathrm{sec}[/tex]
• To find total travelled distance, use the formula
[tex]\text { Distance }=\text { Speed } \times \text { Time }[/tex]
[tex]\mathrm{d} &=3.5 \times 14590 \\[/tex]
[tex]&=51065 \mathrm{~m}[/tex]
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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.
Animals have an advantage over plants with the ability to move. What structure does animals not possess that allows us to be mobile?
Large central vesicle
Mitochondria
Chloroplasts
Cell Wall
please helpp, i'll give brainlest
which of the following statements cite evidence that supports or led to the discovery of the cell theory. select all that apply.
- development of the microscope
- schledians observation of plant cells in various samples of the plant tissue
- cells were found in animal tissue
- watson's and cricks discovery of the structure of dna
- one celled organisms reproduce by binary fission
- plants carryout photosynthesis
-meiosis
- spontaneous generation is accepted amount scientist
5. Name 3 things bacteria are "notorious" for?
Answer:
While pathogenic bacteria are notorious for such diseases as cholera, tuberculosis, and gonorrhea, such disease-causing species are a comparatively tiny fraction of the bacteria as a whole. Bacteria are so widespread that it is possible only to make the most general statements about their life history and ecology.
Explanation:
hope this helps.
any other questions ask me.
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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Which statement describes a cell part needed by the cell to make proteins?
Answer: The nucleus contains DNA.
Explain how a person could be born with an XX karyotype but develop male sex characteristics. Be specific.
Answer:
SRY-positive 46,XX testicular disorder of sex development.
Explanation:
If a fetus is conceived from a sperm cell with an X chromosome bearing the SRY gene, it will develop as a male despite not having a Y chromosome.
Which of the following statements regarding prokaryotic and eukaryotic cells is true
Answer:
I would need the statements to answer that. however prokaryotic cells are plant cells and eukaryotic cells are animal cells
Answer:
They are typically smaller than eukaryotic cells. The DNA of a prokaryotic cell is contained in the nucleoid. There are several ways in which prokaryotic cells are different from eukaryotic cells. Firstly, they are generally smaller in size, their organelles are not membrane bound, and they have no nucleus. They, however, share commonalities with eukaryotic cells including the presence of a bilipid plasma membrane, presence of ribosomes and DNA.
Hope this helps, have a great day/night, and stay safe!
A human liver cell has a different size and shape from a human muscle cell. What is the best explanation for these differences?
A. The cells perform different functions.
OB. One of the cells is used to reproduce more cells while the other is not.
OC. One type of cell develops into the other type of cell.
OD. One of the cells must have come from another species.
Answer:
A
Explanation:
A human liver cell would have a different size and shape from a human muscle cell because they perform different functions in the body.
The shape a cell would assume and its size depends on the function the cell performs. The functions of the liver in the body of humans differ greatly from the functions of muscles. While the former helps in detoxification, deamination, digestion, etc., the latter helps in support, movement, etc.
The correct option is A.
A human liver cell has a different size and shape from a human muscle cell because the cells perform different functions.
CELL:
Cell is the basic and fundamental unit of life. It is the simplest level of organization of an organism. Cells contain organelles that help them perform specific functions. Organs are made up of numerous cells. Similar cells perform similar functions while dissimilar cells perform dissimilar functions. Therefore, a human liver cell has a different size and shape from a human muscle cell because the cells perform different functions.Learn more at: https://brainly.com/question/22663686?referrer=searchResults
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.
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! ^-^
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:
For a neuron with an initial membrane potential at -70 mV, an increase in the movement of potassium ions out of that neuron's cytoplasm would result in the
The potassium ions are positively charged(cations) if the charge is -70mV the outflow of cations will cause a decrease in the potential. The potential will become lower than -70mV.
The given condition of an increase in the movement of potassium ions out of that neuron's cytoplasm would result in the hyperpolarization of the neuron.
Hyperpolarization is a change in a cell's membrane potential becomes more negative at a particular spot on the neuron's membrane
A hyperpolarization is an event or stage that takes place when some potassium channels remain open and sodium channels reset.The sodium-potassium pump keeps the concentrations of Na+ and K+ at constant disequilibrium to set the membrane potential of neurons.Increased potassium movement leads to more potassium ions out of that neuron's cytoplasm. It can be seen as a slight dip following the spike.Thus, the correct answer would be the hyperpolarization of the neuron.
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explain how the oceans serve as a carbon reservoir. what are some of the effects of this on marine life?
Answer:
Carbon pollution is changing the ocean's chemistry, slowing its ability to uptake CO2, making it more acidic, and harming shellfish and other marine life we depend on. The ocean has absorbed about 29 percent of global CO2 emissions since the end of the preindustrial era.Human activities affect marine life and marine habitats through overfishing, habitat loss, the introduction of invasive species, ocean pollution, ocean acidification and ocean warming.
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.
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.
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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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:
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uma bela noite abençoe
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
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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There is no hard boundary between a coral reef and the open ocean. How does defining a boundary help scientists to better study a coral reef?
A.
Defining a coral reef boundary allows scientists to explain all ocean parts and interactions by studying the reef as a system.
B.
Defining a coral reef boundary allows scientists to focus on a smaller set of parts and interactions.
C.
Defining a coral reef boundary allows scientists to see how the parts of the reef interact with the parts of the rest of the ocean.
D.
Defining a coral reef boundary allows scientists to decide that the reef is not part of the ocean.
the freezing point of fresh water is ____ the freezing point of salt water?
O lower than
O related to
O equal to
O greater than
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)
Which labels would correctly model photosynthesis?
Answer:
A. Carbon dioxide
B. Light energy
C. Oxygen
D. Glucose
E. Water
Explanation: