Answer:
B
Explanation:
Identify and describe the protist that was responsible for the Irish potato famine of the 1840s.
A.) brown algae
B.) water mold
C.) Protoza
D.) slime mold
Answer:
B.) water mold
Explanation:
The water mold is a filamentous fungus like organisms that lives in brackish water, fresh water or wet soils. They are saprophytic, that is, they live on dead organisms. Their reproduction is usually by motile asexual spores (zoospores).The zoospores are of two types namely pear-shaped with apical flagella and kidney-shaped with two flagella on the concave side. Water mold are usually identified by their zoospores.
What are carbohydrates?
O Water is non-polar which is why other compounds will dissolve in it
O Macromolecules composed of amino acids
O Non-water soluble macromolecules with a high proportion of hydrocarbons
O Macromolecules composed of nucleotides
Answer:
O Non-water soluble macromolecules with a high proportion of hydrocarbons
Explanation:
Carbohydrates are one of the four biological molecules in nature (asides from proteins, nucleic acid, and lipids). Carbohydrates are a complex polymer consisting of several chains of carbon and hydrogen (hydrocarbons).
According to this question, carbohydrates are non-water soluble macromolecules with a high proportion of hydrocarbons.
which organism in the food web might be found in the first tropic level of a food chain
cougar
mouse
acorns
coyote
Answer:
Acorns would be found at the first trophic level of a food chain.
Explanation:
Over the past few hundred years, the human population on Earth has
Answer:
7.9 billion
in June 2021 to the United nations Estimated elaborted by worldmeter.
Match the names of the microscope parts in column A with the descriptions in column B. Place the letter of your choice in the space provided.
Column A Column B
a. Adjustment knob (coarse) _______ 1. Increases or decreases the light intensity
b. Arm _______ 2. Platform that supports a microscope slide
c. Condenser _______ 3. Concentrates light onto the specimen
d. Eyepiece (ocular) _______ 4. Causes stage (or objective lens) to move upward or downward
e. Field of view _______ 5. After light passes through the specimen, it next enters this lens system
f. Iris diaphragm _______ 6. Holds a microscope slide in position
g. Nosepiece _______ 7. Contains a lens at the top of the body tube
h. Objective lens system _______ 8. Serves as a handle for carrying the microscope
i. Stage _______ 9. Part to which the objective lenses are attached
j. Stage (slide) clip _______ 10. Circular area seen through the eyepiece
Answer:
Adjustment knob (coarse) ---> Causes stage (or objective lens) to move upward or downward
Arm ---> Serves as a handle for carrying the microscope
Condenser ---> Concentrates light onto the specimen
Eyepiece (ocular) ---> Contains a lens at the top of the body tube
Field of view ---> Circular area seen through the eyepiece
Iris diaphragm ---> Increases or decreases the light intensity
Nosepiece ---> Part to which the objective lenses are attached
Objective lens system ---> After light passes through the specimen, it next enters this lens system
Explanation:
The microscope is an essential equipment used in science laboratories to view objects which are too small to be seen by the naked eye. Also certain processes which occur at the microscopic level can only be observed using a microscope.
There are many different types of microscopes. The compound light microscope is the one most commonly used in biological laboratories to view tissues and cells of organisms. It uses visible light which passes through two separate lens to magnify the image produced of a specimen.
The various parts of compound light microscope and their respective functions are given below:
Adjustment knob (coarse) ---> Causes stage (or objective lens) to move upward or downward
Arm ---> Serves as a handle for carrying the microscope
Condenser ---> Concentrates light onto the specimen
Eyepiece (ocular) ---> Contains a lens at the top of the body tube
Field of view ---> Circular area seen through the eyepiece
Iris diaphragm ---> Increases or decreases the light intensity
Nosepiece ---> Part to which the objective lenses are attached
Objective lens system ---> After light passes through the specimen, it next enters this lens system
Stage ---> Platform that supports a microscope slide
Stage (slide) clip ---> Holds a microscope slide in position
The correct match between microscope parts and names are:
A. adjustment knob (coarse) - 4.
B. Arm - 8.
C. Condenser - 3.
D. eyepiece (ocular) - 7.
E. Field of view - 10
F. Iris Diaphragm - 1
G. Nosepiece - 9
H. objective lens system - 5
I. Stage - 2
The microscope is an important piece of equipment used in biological science that helps in view objects that can not be seen by the naked eye. It is also used in various branches of science used to see certain processes that occur at the microscopic level.
A. adjustment knob (coarse) - Causes stage or objective lens to move up or down B. Arm - Serves as a handle for carrying the microscopeC. Condenser - focus or concentrates light onto the specimenD. eyepiece (ocular) - Contains a lens at the top of the body tubeE. Field of view - Circular area can be seen through the eyepieceF. Iris Diaphragm - helps to Increases or decreases the light intensityG. Nosepiece - Part to which the objective lenses are attachedH. objective lens system - After light passes through the specimen, it next enters this lens systemI. Stage - Platform that supports a microscope slideLearn more about microscopes:
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Match the structural formula to the chemical formula for this substance.
Hн
но-с-с-он
ІІ.
Hн
C2H2(OH)2
ООО
HOC2OH
С2Н6O2
O H4CO3H2
Answer:
C2H6O2
Explanation:
Just did it on edge...
Answer:
C2H6O2
Explanation:
Edge 2021
Plants are susceptible to bacterial infections, which can damage their structure or even kill them. Which of the following would be the best antibiotic to treat a plant that is infected with bacteria?
A) a drug that interferes with mitochondria function.
B) a drug that disrupts cell wall structure and function.
C) a drug that destroys the central vacuole.
D) a drug that blocks gene expression in circular chromosomes.
Answer:
The correct answer is: D) a drug that blocks gene expression in circular chromosomes.
Explanation:
Antibiotics are the drugs that are mostly used when it comes to treating bacterial infections because of their effective mechanisms in killing bacteria and/or preventing their spread.
Bacteria have the ability to colonize and infect different organisms by making use of highly diverse mechanisms, some of which involve the use of toxins or the inhibition of the host's immune system.
Bacteria are prokaryotic individuals - instead of having a nucleus containing DNA in multiple chromosomes like eukaryotes have, they have one single circular chromosome that holds all or most of all their genetic information. If we wanted to treat a plant (which is a eukaryotic being) for a bacterial infection, we should aim to block the expression of genes in circular chromosomes, which is a distinct feature in bacteria.
If we were to give the plant a drug that interferes with mitochondria function or destroys the central vacuole, we would only be affecting plant cells and probably killing the plant. A drug that disrupts cell walls would affect the bacteria but would kill the plant as well (both organisms have cell walls). The only viable option out of the mentioned is using a drug that inhibits gene expression in circular chromosomes.
What does it mean to say science is a systematic process
Determine the new concentration, in mg/mL, of the starch solution you diluted in the Erlenmeyer flask. Recall from the Procedures that there are 20 mg/mL of starch in the 2% solution. Use that to determine the milligrams of starch in the diluted starch solution. Then, divide the milligrams of starch by the total volume of the solution, which includes the water plus the starch solution. Record your results for use in future questions.
a. 2 mg/mL
b. 0.05 mg/mL
c. 0.2 mg/mL
d. 10 mg/mL
Answer:
0.05 mg/mL ( B )
Explanation:
Given data:
20 mg/ml starch
2% solution = 2g of solute is in 100g of solvent
Determine the new concentration in mg/ml
Dilution equation = C1V1 = C2V2
new concentration ; applying the dilution factor
dilution factor = 1 : 400 ; ( 2 /400 )g = 0.005 g of solute is present in every 100 mL
∴ new concentration = 0.00005 g / 1 mL * ( 1000 mg / 1g ) = 0.05 mg/mL
Critical thinking is the ability to reason and solve problems using facts and concepts. These questions can be approached from a number of angles, and in most cases, they do not have a single correct answer.
Give the common name of a eukaryotic microbe that is unicellular, walled, nonphotosynthetic, nonmotile, and bud-forming.
Answer:
Yeast
Explanation:
The correct answer would be yeast.
Yeast belongs to the fungi kingdom. Organisms in the fungi kingdom are generally eukaryotic in that their cells contain a nucleus and membrane-bound organelles such as mitochondrion. Fungal cells lack chlorophyll and are therefore nonphotosynthetic. They are also nonmotile
While fungi exhibit different body forms in terms of body complexity, the only unicellular form is yeast. The organism possesses all the attributes of fungi highlighted above, has a cell wall made largely of chitin, and reproduces through budding.
Answer: Yeast.
Explanation:
Yeasts are eukaryotic organisms, more precisely microscopic fungi that do not form filamentous networks (hyphae), classified as ascomycetes or basidiomycetes and are predominantly unicellular in their life cycle. The cell wall of yeasts is composed of complex "B"-glucan polysaccharides, mannoproteins and chitin. Also, yeast are non-motile organisms when they grownon a solid media.
They usually reproduce asexually by budding or bipartition and by having sexual stages that are not attached to a sporocarp (fruiting body). During asexual reproduction, a new bud emerges from the mother yeast when suitable conditions are met, after which the bud separates from the mother upon reaching adult size. In the case that they reproduce sexually, this occurs by means of ascospores or basidiospores. In conditions of nutrient scarcity, yeasts that are able to reproduce sexually will form ascospores.
Yeasts are important because of their ability to carry out the decomposition by fermentation (predominantly alcoholic) of various organic compounds, mainly sugars or carbohydrates, producing different substances. Therefore, they do not photosynthesize to obtain energy, since they do not possess chlorophyll (pigment responsible for capturing solar energy for photosynthesis).
At her initial evaluation, Ms. Jones reports that she has lost 25 pounds over the past eight months despite an increase in her appetite. She complains of extreme fatigue, heart palpitations and irritability. Clinical observations reveal a protrusion of the eyeballs and hand tremors. You suspect that she might have:
a. hypothyroidism
b. diabetes mellitus
c. hypopituitarism
d. hyperthyroidism
Answer:
d. hyperthyroidism
Explanation:
Hyperthyroidism is a condition that occurs when the thyroid gland in our body secretes too much of the thyroxin hormone. Thyroid gland is a butterfly shaped gland that is located in our neck and it produces the hormone called thyroxin. Excess production of thyroxin leads to a condition named hyperthyroidism.
A person's metabolism increases when he or she is suffering from hyperthyroidism. One's weight is lost but the appetite increases. Other symptoms are extreme fatigue, irritability, heart palpitations, sweating and puffy eyes.
Thus in the context, Ms. Jones is suspect to have hyperthyroidism as she she is showing all the above symptoms.
Natural selection was acting on the population of radish plants. Which of the following DOES NOT satisfy a condition of natural selection as it relates to our radish populations?
a. there was a purple phenotype and a white phenotype
b. the R allele produced a white plant, and rr produced purple plants
c. competition was affecting the reproductive success of at least one of the morphs
d. our populations of radishes were small
e. all of the above are examples of conditions necessary and sufficient for evolution by natural selection
Answer:
d. our populations of radishes were small
Explanation:
Natural selection is a type of evolution that allows only individuals with favorable characteristics and better adapted to the environment to survive and reproduce offspring with the same favorable characteristics. In this case, to observe a population where natural selection is taking place, population sizes can be disregarded, as this is not a condition for natural selection to take place. However, the other conditions presented in the response options are necessary for natural selection, since it is necessary that there are different phenotypes and genotypes in the population and that competition between them promotes the survival of one group at the expense of the other.
A(n) is a molecule, cell, or organ that directly carries out a response to a stimulus and restores homeostasis.
Answer:
Red blood cells and the heart causes response to stimuli
What sugars are composed of short chains
The monosaccharides glucose, fructose, and galactose are single sugar molecules. The disaccharides sucrose, lactose, and maltose are double sugar molecules. Complex carbohydrates are chains of more than two sugar molecules. Short carbohydrate chains are called oligosaccharides and contain 3 to 10 sugar molecules.
How are organisms in the domain Archaea different from those in the domain
Eukarya?
Answer:
Eukaryotes have nucleus, Archaea do not have.
but Archaea have DNA that's not in nuclues.
Eukarya possess organelles in membrane whereby Archaea do not possess membrane around organelles.
Answer: Eukaryotes have a nucleous
Explanation:
Comb jellies are:____.
A. Bilaterally symmetrical.
B. Similar to a cnidarian polyp.
C. Distinguished by eight bands of cilia.
D. Colonial animals.
E. Carnivores that use nematocysts to capture prey.
Answer:
C. Distinguished by eight bands of cilia.
Explanation:
Ctenophora, also known as comb jellies, represents a phylum of transparent, mostly pelagic, invertebrate marine animals that live around the world. This group characterized by eight rows of cilia (singular cilium) that are used for locomotion. Cilia are organelles and/or structures that extend from the surface of eukaryotic cells, which can be used to move the surrounding fluid, resulting in cell movement. This phylum is divided into two classes: Tentaculata (with tentacles) and Nuda (without tentacles).
 Why is if imporrant to find a location to build your house?
Explanation:
It's the most important factor when buying real estate. Location matters, even the location inside the neighborhood will have a large impact on your home's value. ... You want to buy on the low end of the neighborhood's price range because the other homes in your neighborhood will bring your value up
How and why does the epidermis produce new skin cells?
Answer:
About 95 percent of the skin cells in the epidermis are devoted to creating new skin cells in the lower two levels of the epidermis, which then cycle to the top layer to help form the stratum corneum. Eventually the dead cells of the stratum corneum flake off as new keratinocytes move up, and the cycle repeats itself.
Hope this answer is right!!
What is meant by Vetebral Column?
Plant and animal cells are complex and contain many structures.
a. True
b. False
Answer:
false ig because animal cell is not complex(i am not sure)
High altitude adaptation is a complex physiological process that involves an increase in both the number of Hb molecules per erythrocyte and the total number of erythrocytes. It normally requires several weeks to complete. However, even after one day at high altitude, there is a significant degree of adaptation. This effect results from a rapid increase in the erythrocyte BPG concentration.
a. Try to do this without looking at the graphs. If oxygen-binding curves for both high altitude adapted hemoglobin and normal, unadapted Hb were plotted together, would the curve for high altitude adapted Hb be to the left of, to the right of or the same as the curve for unadapted Hb? Explain.
b. Is the oxygen binding affinity of high-altitude adapted Hb higher, lower, or the same as that of unadapted Hb? Explain.
Answer:
a. To the right
b. higher
Explanation:
From the information given:
a.
The oxygen-adsorption curve of the elevated high altitude modified the hemoglobin and this will move to the right because there is a reduced amount of oxygen available at high altitude, as well as an increase in carbon dioxide and H+ ion concentration, temperature, and all of which raise pH and shifts the curve towards the right.
b.
As there is a low relative partial pressure of oxygen at high altitude, the oxygen-binding attraction of high altitude adaptable hemoglobin is greater and higher than that of unadapted hemoglobin under pulmonary oxygen loading. This is important to optimize the oxygen concentration levels in blood circulation and blood tissues.
what bond is broken when energy is released?
Answer:
Bonds are both broken and made in chemical reactions but many biology teachers and textbooks state that "Breaking ATP bonds releases energy." In reactions bonds are broken and made. If the strength of the bonds formed exceeds the strength of the bonds broken the reaction is exothermic.
Explanation:
Hope this helps. :)
What would be the reaction of sea anemone if a glass rod touch the tip of its tentacles?
Answer:
releasing venom from the skin
What is biotechnology, and what are some examples from the ocean?
Answer:
Marine biotechnology may include techniques such as bioprocessing, bioharvesting, bioprospecting, bioremediation, using bioreactors etc (so called process biotechnology techniques); aquaculture/fisheries; gene, protein, or other molecule based techniques; while applications may include: health, food, cosmetics
What does the symbiotic relationship commensalism mean? (Question is from GradPoint.)
A. One organism captures and eats another
B. One organism benefits and the other is not affected
C. One organism feeds off of another organism
D. Both organisms benefit
Answer:
B
Explanation:
Commensalism is a symbiotic relationship in which one species benefits while the other species is not affected.
Answer: B. One organism benefits and the other is not affected
1. What is stimulus?
2. Define response.
3. What are tropic movements
4. What excretory products are produced in plants?
5. When do stomata open and close?
Answer:
1.someting that causes directly, development, interest.
2.an answer to somebody something
3.directional movement of particular part of a plant in response to environmental stimuli
4. carbon dioxide, oxygen
5. allow for the uptake of carbon dioxide anf to limit the loss of water due to evaporation
What is the most likely
explanation for the DNA found in
mitochondria?
A. Mitochondria was once a prokaryotic
organism.
B. Mitochondria was once a eukaryotic
organism.
C. Mitochondria was once a primkaryotic
organism.
Answer:
A
Explanation:
its a
The most likely explanation here is that mitochondria was once a prokaryotic organism. The correct option is A.
What is mitochondria?Mitochondria are membrane-bound cell organelles that produce the majority of the chemical energy required to power the cell's biochemical reactions (mitochondrion, singular).
The mitochondrial energy is stored in a small molecule known as adenosine triphosphate (ATP).
Mitochondria are special compartments (organelles) in our cells best known for their role as powerhouses, converting food molecules into ATP, a molecular fuel for the rest of the cell.
Mitochondria and chloroplasts most likely evolved from engulfed prokaryotes that were once self-contained organisms.
At certain point, an aerobic prokaryote was engulfed by a eukaryotic cell, which then formed an endosymbiotic relationship with the host eukaryote, eventually developing into a mitochondrion.
Thus, the correct option is A.
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ONE FOOD CHAIN that was affected by the introduction of wolves and model it
Answer:
Carnivorous
Explanation:
The wolf, also known as the gray wolf or grey wolf, is a large canine native to Eurasia and North America. More than thirty subspecies of Canis lupus have been recognized, and gray wolves, as colloquially understood, comprise non-domestic/feral subspecies. Wikipedia
If the last carbon atom of an unsaturated fatty acid is bonded to two hydrogen atoms and one carbon atom, what type of bond must exist between the last carbon and the other carbon atom?
single
double
triple
quadruple
Answer:
double
Explanation:
B
Double bond must exist between the last carbon and the other carbon atom.
What s unsaturated fatty acid?Unsaturated fats are commonly biosynthesized by a one of a kind dehydrogenation response called desaturation. The science of this change is wonderful in its selectivity.
The development and use of novel robotic tests (deutero-, fluoro-, thia-containing substrate analogs) has prompted a more refined comprehension of how unsaturated fat desaturases and related compounds complete their super particular oxidation science. The stereochemistry and request of hydrogen expulsion has been inspected for various solvent and layer bound desaturses.
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How do organisms have a negative impact on the water cycle? And how can they affect other organisms with your answer? Please help.
