Answer:
C. Astrobiology
Explanation:
Hope it helps!
Cell division is an essential stage, and eventual result, of every organic cell cycle. What are the different types of cell division? How do they differ from each other?
According to the flow chart, if blood glucose is low, insulin is not released into the bloodstream, and
Answer:
Glucagon is secreted
Explanation:
Glucagon is an hormone secreted by the alpha cells of the pancreatic islets. It is secreted when the blood glucose is low, when the blood glucose is high, glucagon is not secreted.
Glucagon affects the liver and some other cells but has more effect on the liver.
It allows for the release of glucose stored up in the liver cells into the blood stream to increase blood glucose.
Charles Darwin observed a unique beak size and shape in the finch population of each of the Galapagos Islands that he visited. 4 drawings of finch beaks. From left to right the beaks decrease in size. Which is the most likely cause of the observed variation? differences in the climate among the islands competition among individuals for available food sources competition among individuals for desirable mates differences in egg size among the populations
Natural selection would probably favor different varieties in the different islands. In other words, beaks changed as the birds developed different tastes for fruits, seeds, or insects picked from the ground or cacti (due to lack of food resources). Long, pointed beaks made some of them more fit for picking seeds out of cactus fruits.
Hope This Helps!
Which viral life cycle can be triggered to enter into the other one? What triggers that process?
Answer:
All viruses depend on cells for reproduction and metabolic processes. By themselves, viruses do not encode for all of the enzymes necessary for viral replication. But within a host cell, a virus can commandeer cellular machinery to produce more viral particles. Bacteriophages replicate only in the cytoplasm, since prokaryotic cells do not have a nucleus or organelles. In eukaryotic cells, most DNA viruses can replicate inside the nucleus, with an exception observed in the large DNA viruses, such as the poxviruses, that can replicate in the cytoplasm. RNA viruses that infect animal cells often replicate in the cytoplasm.
The Life Cycle of Viruses with Prokaryote Hosts
The life cycle of bacteriophages has been a good model for understanding how viruses affect the cells they infect, since similar processes have been observed for eukaryotic viruses, which can cause immediate death of the cell or establish a latent or chronic infection. Virulent phages typically lead to the death of the cell through cell lysis. Temperate phages, on the other hand, can become part of a host chromosome and are replicated with the cell genome until such time as they are induced to make newly assembled viruses, or progeny viruses.
The Lytic Cycle
During the lytic cycle of virulent phage, the bacteriophage takes over the cell, reproduces new phages, and destroys the cell. T-even phage is a good example of a well-characterized class of virulent phages. There are five stages in the bacteriophage lytic cycle (see Figure 1). Attachment is the first stage in the infection process in which the phage interacts with specific bacterial surface receptors (e.g., lipopolysaccharides and OmpC protein on host surfaces). Most phages have a narrow host range and may infect one species of bacteria or one strain within a species. This unique recognition can be exploited for targeted treatment of bacterial infection by phage therapy or for phage typing to identify unique bacterial subspecies or strains. The second stage of infection is entry or penetration. This occurs through contraction of the tail sheath, which acts like a hypodermic needle to inject the viral genome through the cell wall and membrane. The phage head and remaining components remain outside the bacteria.
This figure outlines the stages of the lytic cycle. Step 1 is attachment when the phage attaches to the surface of the host. The bacteriophage is shown sitting on the surface of the bacterial host cell. Step 2 is penetration when the viral DNA enters the host cell. The image shows DNA from within the virus being injected into the host DNA. Step 3 is biosynthesis when the phage DNA replicates and the phage proteins are made. The image shows various pieces of virus being built within the cell. Step 4 is maturation when the new phage particles are assembled. This shows the viral components being put together in the cell. The fifth step is lysis when the cell lyses and the newly made phages are released. This shows the cell bursting and built viruses being released.
Figure 1. A virulent phage shows only the lytic cycle pictured here. In the lytic cycle, the phage replicates and lyses the host cell.
The third stage of infection is biosynthesis of new viral components. After entering the host cell, the virus synthesizes virus-encoded endonucleases to degrade the bacterial chromosome. It then hijacks the host cell to replicate, transcribe, and translate the necessary viral components (capsomeres, sheath, base plates, tail fibers, and viral enzymes) for the assembly of new viruses. Polymerase genes are usually expressed early in the cycle, while capsid and tail proteins are expressed later. During the maturation phase, new virions are created. To liberate free phages, the bacterial cell wall is disrupted by phage proteins such as holin or lysozyme. The final stage is release. Mature viruses burst out of the host cell in a process called lysis and the progeny viruses are liberated into the environment to infect new cells.
Which cell lacks a nucleus
Answer:
prokaryotic cell
which of the following does not describe a protein function?
The science of the classification of organisms is
???
Answer:
Taxonomy. Quick google search. :)
Explanation:
If there was not an increase in cyanobacteria in early Earth, what would have happened to Earth’s early atmosphere? A. The amount of oxygen would have increased, causing an increase in aerobic autotrophs and heterotrophs B. The amount of oxygen would have increased, causing a decrease in aerobic autotrophs and heterotrophs. C. The amount of oxygen would have decreased, causing an increase in aerobic autotrophs and heterotrophs. D. The amount of oxygen would have decreased, causing a decrease in aerobic autotrophs and heterotrophs.
Answer:
Explanation:
Anaerobic bacteria are able to survive in the absence of oxygen while aerobic bacteria survive only in the presence of abundant oxygen.
Hence, while reduced levels of dissolved oxygen in the pond decrease the amount of aerobic bacteria like Bacillus; anaerobic bacteria like Actinomyces flourish since they survive on organic substances like methane, cellulose instead.
Explanation:
A piece of potato weighs 20g fresh and 5g dry. What is the percentage water content of the potato?
A. 5%
B. 15%
C. 25%
D. 75%
Answer:
D. 75%
Explanation:
you take the difference of the two which is 15 and divide it by the original weight with water (you want to make sure to always divide the smaller # by the bigger # so you can get a decimal) then you will see that you get a decimal that you convert to a percentage :))
hope this helped ;))
A ______ is a molecule released from a synaptic vesicle that excites or inhibits another neuron, muscle fiber, or gland cell.
Answer:
Neurotransmitter
Which organelle makes proteins using coded instructions that come from the nucleus
Answer:
Ribosome
Explanation:
Ribosomes are small particles made up of RNA and protein that produce proteins following coded instructions that come from the nucleus
Which of the following is/are example(s) of lymphocytes?
1) antibodies
2) B-cells
3) T-cells
4) T and B-cells
Answer:
4) T and B-cells
Explanation:
{Need answer in the next 30 min.}
Which two sub-units make up a typical lipid?
Group of answer choices
A)Glycerol and fatty acid
B)Waxes and oils
C)Amino acid and fatty acid
D)Nucleotides and phosphates
Answer: A. Glycerol and Fatty Acid
Scientists often use models of the earth because
-It is impossible to study the earth
-the earth is too small to study
-the earth is too large to see all at once
Answer:
the answer is the earth is too large to see at once
Answer:
the earth is too large to see it all at once
Explanation:
What other biome is it close to or in relation to desert ?
Which correctly lists three tools that are currently used to collect images during space exploration? rover, satellite, space station orbiter, space station, space shuttle satellite, rover, orbiter space shuttle, space station, rover
Answer:
rover, satellite, space station
Explanation:
Which correctly lists three tools that are currently used to collect images during space exploration?
rover, satellite, space station
orbiter, space station, space shuttle
satellite, rover, orbiter
space shuttle, space station, rover
A is the correct answer for this Question
Answer:
A
Explanation:
rover, satellite, space station
Plant root tips have a layer of cells that function together to grow
rapidly to allow the plantto increase the plant's ability to reach water and
stabilize in the ground. Based on this information, what level of
organization describes the plant root tips? *
Tissue
Organ
Organ system
Organism
Answer:
Tissue
Explanation:
The level of organization of the layer of cells in the plant's root tips is considered to be a special type of tissue known as meristematic tissues.
The meristematic tissues generally consist of undifferentiated cells that are capable of dividing rapidly throughout the life cycle of organisms. The meristematic tissues of the root tips are known as the root apical meristems and represent the tissue from which all primary root tissues are derived.
Water which has soaked into the ground is knowscin as _______
It is known as "groundwater"
Hope this helps
~Knyx~
How would the contractile vacuole of a freshwater amoeba respond if the organism was placed in seawater?
with more contractions
with fewer contractions
the contractions would suddenly cease
with the same frequency of contractions
Answer:
the answer is B, with fewer contractions
Explanation:
The contractile vacuole of a freshwater amoeba responds if the organism was placed in seawater having fewer contractions.
Impact on the contractile vacuole:In the case when the freshwater amoeba should be placed in the seawater so the seawater should be hypertonic the water and flow out of the cell.
Due to this, the contractile vacuole will become more contracting to release water.
hence based on this, The contractile vacuole of a freshwater amoeba responds if the organism was placed in seawater having fewer contractions.
Learn more about water here: https://brainly.com/question/21488442
A question about a moral issue
is answered by examining facts rather than opinions.
is generally considered a scientific question.
cannot be answered with scientific methods.
cannot be debated through discussion.
Answer:
Cannot be answered with scientific methods.
A question about a moral issue cannot be answered with scientific methods. Thus option C is correct.
What is scientific method ?scientific method is a structured form of study where a group of facts can be explained by using scientific hypothesis and laws.
Every scientific theory determined on the basis of scientific method, where scientist make an observation and formulate a hypothesis.
After this design an experiment and conduct the experiment to test that hypothesis.
If the result of hypothesis is incorrect, then new hypothesis will be developed and begin the the experiment again.
If the result of hypothesis is correct and supported by the results of the experiment, test again to get the accuracy of the result.
Thus option C is correct.
For more details regarding scientific method, visit:
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C6H12O6 + 602 → 6CO2 + 6H2O
Answer:
The chemical equation for photosynthesis is 6CO2+6H2O→C6H12O6+6O2. 6CO2+6H2O→C6H12O6+6O2. In plants, the process of photosynthesis takes place in the mesophyll of the leaves, inside the chloroplasts. Chloroplasts contain disc-shaped structures called thylakoids, which contain the pigment chlorophyll.
Explanation:
Because water does not change temperature rapidly it is an important factor in
helping organisms maintain homeostasis.*
true
false
What are the reactants of water(it says there is two reactants just don’t know what they are
A student wants to see how temperature affects the
production of gases when yeast and water are mixed. She
mixes them at different temperatures in clean soda
bottles. She then places a balloon over the top of each
bottle.
which statement best describes the use of the balloons in this experiment?
A. It is imaginative, because it makes the experiment feel like a party
B. It is creative, because it allows the student to add color to the
experiment
c. It is logical, because it allows the student to catch any invisible
gases given off
O D. It is biased, because it means that not all the variables are properly
controlled
Answer:
The answer is c, your welcome;)
Explanation:
Answer: Is is logical, because it allows the student to catch any invisible gases off
Explanation:
I'm taking the test right now and got it right
All living organisms have a complex chemistry.
A) TRUE
B) FALSE
Answer:
true
Explanation:
Can someone please help me answer these questions?
1. Name and describe each of the 3 major processes in the water cycle.
2. Describe the properties of ocean water.
3. Describe the 2 types of ocean currents.
4. Name the 2 types of freshwater and describe how they can be stored.
Answer:
evaporation, condensation, and precipitation. Evaporation is the process of a liquid's surface changing to a gas. In the water cycle, liquid water (in the ocean, lakes, or rivers) evaporates and becomes water vapor. condensation water which collects as droplets on a cold surface when humid air is in contact with it. Precipitation is water released from clouds in the form of rain, freezing rain, sleet, snow, or hail. It is the primary connection in the water cycle that provides for the delivery of atmospheric water to the Earth. Most precipitation falls as rain. properties of ocean water.Ocean waters are salty and contain minerals and dissolved gases. They also have a high heat capacity and vary in density depending on temperature and salinity. The two basic types of currents – surface and deep-water currents – help define the character and flow of ocean waters across the planet.On the landscape, freshwater is stored in rivers, lakes, reservoirs, and creeks and streams. Most of the water people use everyday comes from these sources of water on the land surface. Lakes are valuable natural resources, both for human and non-human life.
What is a test variable? Give an example
what pathogen is cholera?
Answer:
It is The vibrio cholerae
What is the difference between a hypothesis and a theory? A hypothesis is a testable statement, and a theory is well-supported explanation. A hypothesis is a theory that has been proven. A hypothesis is a law of nature, and a theory is always true. A hypothesis is an observation that can turn into a theory.
Answer:
In scientific reasoning, a hypothesis is an assumption made before any research has been completed for the sake of testing. ... A theory on the other hand is a principle set to explain phenomena already supported by data.
Explanation:
The main difference between a hypothesis and a theory is that a hypothesis is a testable statement, and a theory is a well-supported explanation. Thus, the correct option is A.
What are Scientific theories?A Scientific theory may be characterized as a well-determined description of some significant features of the natural world, based on a body of certainty that has been repeatedly assured through observation and experiment.
The theories can transform themselves into laws when they gather sufficient evidence. While a hypothesis is a testable statement that needs sufficient evidence to be proved. A hypothesis is never turned into theories until they have some evidence to support the claim.
Therefore, the main difference between a hypothesis and a theory is that a hypothesis is a testable statement, and a theory is a well-supported explanation. Thus, the correct option is A.
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what are the factors affect the shape of the cell
Answer:
there are three general factors who regulate or control cell shape are the state of the cytoskeleton, and the amount of water that is transported into a cell, and the state of the cell wall.
