Answer and Explanation:
FALSE
Personal boats and watercraft DO contribute to ocean pollution.
Most water vehicles need fuel to be powered and go through the water. This fuel can sometimes go into the water, polluting the surrounding area.
Watercraft that don't use fuel, but instead are man-powered, can still contribute to ocean pollution. People can bring items such as soda cans, beer bottles, fishing equipment, etc., and any of these items tend to be discarded into the water, leading to pollution and degradation of the ecosystem, harming any wildlife that lives there.
I hope this helps!
#teamtrees #PAW (Plant And Water)
Which of these groups is the smallest level of classification?
A. Class
B. Order
C. Phylum
D. Family
The mitochondrial DNA sequence that is shared by two species has a steady mutation rate. Scientists determine the sequences of these two species to be as follows
Species A: CAGGCCATTATG
Species B: CCAGCCTATAGG
Based on this information, which of the following best explains the difference in the DNA sequence between the two species?
A) Species A and B probably share the most recent ancestor because they only differ by three mutations.
B) Species A and B have fewer differences between DNA sequences means that fewer mutations occurred.
C) Species A and B probably have distinct ancestors because they have many differences in mutations.
D) Species A and B are closely related because they differ by five mutations in their DNA sequence.
It is expected that Species A and B have distinct ancestors because they have many differences in mutations (Option C).
What is the mutation rate?The mutation rate makes reference to the number of mutations that appeared in a given nucleotide sequence in a given period of time.
In this case, sequences from Species A and B have 5 mutations and aligned sequences have only 12 nucleotides, which is a considerably high mutation rate to share a common origin.
Nonetheless, information about divergence times might be helpful to determine the origin of these sequences.
In conclusion, nucleotide sequences of Species A and B exhibit many mutations and therefore they do not have the same evolutionary origin (Option C).
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the diagram below represents two cells, x and y which statement is correct concerning the structure labeled A ?
The diagram below (attached image) represents two cells, X and Y.
Which statement is correct concerning the structure labeled A?
A) It is involved in cell communication in cell X but not in cell y.
B) It represents a cell wall in cell X and the cell membrane in cell y.
C) It prevents the absorption of CO2 in cell x and O2 and cell y.
D) It aids in the removal of metabolic waste in both cell X and Y
Cell membrane accomplishes several functions, among them, the removal of cell wastes. Option D. It aids in the removal of metabolic waste in both cell X and Y.
What is the cell membrane?
The cell membrane is a barrier that surrounds the cell content and isolates it from the extracellular space. It is composed of two lipidic layers, proteins, and glucans incrusted in between.
The cell membrane accomplishes many different functions. Among them, we can mention,
Isolation ⇒ It separates the intracellular content from the extracellular space.Protection ⇒ It protects the interior of the cell from any damaging external factor that might affect its correct functioning.Transport ⇒ It allows the selective pass of certain molecules or ions.Substances interchange
⇒ Passive transport → Simple diffusion → through lipids
→ Facilitated diffusion → Assisted by channel
proteins
→ Does not need energy
→ Depends on the molecule size, the concentration
at each side of the membrane, and the charge of
the ions.
→ Occurs in favor of the electrochemical gradient
⇒ Active transport → It does the energy to occur
→ Mediated by carrier proteins
→ Transport big-sized molecules
→ Against the electrochemical gradient
⇒ Endocytosis/Exocytosis → Active transport mediated by vesicles.
Communication ⇒ By emission and reception of substances and molecules, the cell can communicate with other cells. This process is always mediated by membranes and their transport proteins or receptor proteins.
In the exposed example X cell represents an animal cell, and Y cell is a plant cell.
Both the animal and plant cells are eukaryotic. They carry their genetic material in the nucleus and mitochondria. Organelles are located in the cytosol, and both of them are surrounded by a protector cell membrane.
Among the options, the correct one is D. It aids in the removal of metabolic waste in both cell X and Y
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What was the problem with this genetic engineering solution
The potential for greater economic disparity and higher human misery, as well as the potential for extensive eugenics programs and dictatorial control over human life, are among the social and political concerns of genetic engineering. In certain situations, moral danger overrides technological risk without a doubt.
What is genetic engineering?Genetic engineering, often known as genetic alteration, is a technique that modifies an organism's DNA using technology developed in labs. This could entail altering a single base pair (A-T or C-G), erasing a section of DNA, or incorporating new DNA.
Millions of workers will be out of work in a few years if multinational businesses decide to replace the national products of Third World nations with their own biotechnology compounds. And the unintended result is guaranteed, not possible, or likely if governments decide to create racial programs and monitoring systems based on genetic engineering advances. The risk is not that the decision-makers underestimated the effects of their decisions, but rather that they act in an unethical manner.
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Suppose that one of Pasteur's swan neck flasks had broken, such that the neck came off. What would be the likely result?
Maggots would have appeared on the meat
The broth would have remained sterile
Bacteria would not have been isolated in pure culture
The animalcules would have escaped
The liquid would have become contaminated
You have a mixture of bacteria, archaea, fungi, protists, and algae. Which of the following would be most definitive in determining which of these cells are archaea?
Size in a bright field microscope
Structure in a scanning electron microscope
Fluorescence in situ hybridization
Super resolution microscopy
Simple staining
1. The likely result Maggots would have appeared on the meat. Thus. option "A" is correct.
2. Structure in a scanning electron microscope. Thus, option "B" is correct.
What are the different types of cells?The cells can be mainly classified into prokaryotic and eukaryotic. The prokaryotic cells are cells with no nucleus or centrioles but they do have a cell wall, usually one chromosome and complex cilia and flagella. On the other hand, prokaryotic cells have a defined nucleus, multiple chromosomes, and centrioles and some have a cell wall.
Thus, this could be the answer.
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which of the following best describes what happens during a crossover event
a. tetrads change orientation as a lineup along the center of the cell
b. chromatids of homologous chromosomes exchange corresponding segments
c. X and Y sex chromosomes overlap and combine together during metaphase
d. spindle fibers overlap and attach to the wrong chromosomes during anaphase
Answer:
tetrads change orientation as a lineup along the center of the cell
View attachment. Following his motorcycle accident, what type of memory was K.C. able to form?
A) only semantic memories
B) only episodic memories
C) declarative memories
D) procedural memories
biology lab 14 experiment 1 punnett square crosses post lab questions
Complete question: PUNNETT SQUARE CROSSES
1. Set up and complete Punnett squares for these crosses (remember Y = yellow, y = blue):
a. YY and Yy
b. YY and yy
2. Answer these questions: a. What are the resulting phenotypes? b. Are there any blue kernels? c. How can you tell whether or not there are blue kernels?
3. Set up and complete a Punnett square for a cross of two of the F1 from Step 1 (above).
4. Answer these questions: a. What are the genotypes of the F2 generation? b. What are their phenotypes? c. Are there more or fewer blue kernels than in the F1 generation?
5. Identify the four possible gametes produced by the following individuals (S = smooth, s = wrinkled):
a. YY Ss
b. Yy Ss
Punnett squares are used to get the genotypic and phenotypic frequencies among the progeny produced from a cross. Punnett squares and answers below.
What is a punnett square?The Punnett square is a graphic representation that shows the different types of gamete combinations according to the alleles involved in a cross.
Punnett square shows the probabilities of getting offspring with different genotypes and their consequent phenotypes.
In the exposed example,
Diallelic genes that codes for color
Y = yellow ⇒ dominant allele
y = blue ⇒ recessive allele
We will assume complete dominance, meaning that genotypes with at least one dominant allele will express yellow.
1)
a- Cross 1
Parentals) YY x Yy
Gametes) Y Y Y y
Punnett square) Y Y
Y YY YY
y Yy Yy
F1) Genotype
1/2 = 50% of the progeny is expected to be homozygous dominant, YY
1/2 = 50% of the progeny is expected to be heterozygous, Yy
Phenotype
100% of the progeny is expected to be yellow.
b- Cross 2
Parentals) YY x yy
Gametes) Y Y y y
Punnett square) Y Y
y Yy Yy
y Yy Yy
F1) Genotype
100% of the progeny is expected to be heterozygous, Yy
Phenotype
100% of the progeny is expected to be yellow.
2)
a. What are the resulting phenotypes? Only yellow kernels
b. Are there any blue kernels? No
c. How can you tell whether or not there are blue kernels?
Blue is the recessive phenotype for kernels. Assuming complete dominance, since all genotypes are expected to carry at least one dominant allele, all the F1 kernels are yellow.
3) Let us cross two heterozygous individuals from the F1
Parentals) Yy x Yy
Gametes) Y y Y y
Punnett square) Y y
Y YY Yy
y Yy yy
F1) Genotype
1/4 = 25% of the progeny is expected to be homozygous dominant, YY
1/2 = 50% of the progeny is expected to be heterozygous, Yy
1/4 = 25% of the progeny is expected to be homozygous recessive, yy
Phenotype
75% of the progeny is expected to be yellow.
25% of the progeny is expected to be blue.
4)
a. What are the genotypes of the F2 generation?
- 25% YY (homozygous dominant)
- 50% Yy (Heterozygous)
- 25% yy (Homozygous recessive)
b. What are their phenotypes?
- 75% yellow kernels
- 25% blue kernels
c. Are there more or fewer blue kernels than in the F1 generation?
More. Blue kernels appeared in the F2.
5. Assuming independent genes, the resulting gametes after meiosis are as follows
Gametes
a. YY Ss ⇒ YS, YS, Ys, Ys
b. Yy Ss ⇒ YS, Ys, yS, ys
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Freshwater fish are adapted to live in a hypotonic environment. What would happen to the cells of a freshwater fish if it was put into a hypertonic solution such as seawater? Why?
Answer:
they would burst
Explanation:
A 75-year-old male with long-standing hypertension and angina due to coronary heart disease presents with ankle edema, nocturia, increased shortness of breath with activity, and a chronic nonproductive cough. He has a past history of smoking two packs per day and is an ex-alcoholic. His blood pressure is 170/80 and his heart rate is 100. Electrocardiography and chest radiography indicate the presence of left ventricular hypertrophy.
A. Relate the presence of uncontrolled hypertension and coronary artery disease to the development of heart failure in this man.
B. Explain the significance of left ventricular hypertrophy in terms of both a compensatory mechanism and as a pathologic mechanism in the progression of heart failure.
C. Explain the management and treatment for this diagnosis.
Left ventricular hypertrophy increases the chance of sudden death. Studies have shown that the problem increases the risk of developing some diseases, such as heart failure, stroke, coronary heart disease and even sudden death.
A. How does hypertension cause heart failure?In summary, heart failure can occur in the natural history of patients with hypertension, as a result of the action of a wide set of adaptive mechanisms triggered by the persistent increase in ventricular afterload, resulting in diastolic or systolic dysfunction.
B. What is the significance of left ventricular hypertrophy in terms of a compensatory mechanism and a pathological mechanism in the progression of heart failure?The term cardiac hypertrophy refers to increased myocardial mass. It is an adaptive response to a physiological or pathological overload. This adaptation occurs as a response of the heart to an overload of work and can be classified as concentric or eccentric.
C. Explain the management and treatment for this diagnosis.Treatment depends on the underlying cause and may involve medication or surgery. Left ventricular hypertrophy caused by aortic valve stenosis may require surgery to repair the narrowed valve or to replace it with an artificial valve.
With this information, we can conclude that left ventricular hypertrophy increases the chance of sudden death. Studies have shown that the problem increases the risk of developing some diseases, such as heart failure, stroke, coronary heart disease and even sudden death.
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What would increase enzymatic activity in a bacterial cell that would normally thrive in human body
The Cell Theory applies to what kind of cells?
A. ONLY cells with cell walls
B. ALL cells
C. ONLY plant cells
Answer:
B all cells
Explanation:
b all cells
cell theory applies to all living cells in the world
Why is it advantageous for a cell to be small
What is the main difference between the null and the research hypothesis? What is the importance of assuming the null hypothesis is true?
Answer:
The null hypothesis is a general statement that states that there
is no relationship between two phenomenons under
consideration or that there is no association between two groups.
A hypothesis, in general, is an assumption that is yet to be proved
with sufficient pieces of evidence.
which tissue is responsible for bringing about movement
Answer:
The tissue responsible for movement in our body is the muscular tissue.
Explanation:
Muscular tissue consists of elongated cells, also called muscle fibers.
Hope it helps!
You are walking home from class after a long day. You get home and realize you weren't paying attention at all to where you were going but you made it home. What type of memory is this?
- semantic
-procedural
-priming
-classical conditioning
Answer:
procedural memory
Explanation:
essentially, you are subconsciously remembering the "procedure" of going home
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2 a Which part of the human brain is responsible for controlling each of the following actions?
i keeping your balance when you walk
ii maintaining your breathing when you are asleep
iii making your leg muscles contract when you kick a ball
Answer:
The Cerebellum
Explanation:
The Cerebellum, or "little brain" controls all aspects of balance, speech, movement, coordination, and motor skills.
Which of the following is not a condition required for all thunderstorms to
form?
A. Moisture in the lower- to mid-levels of the atmosphere
B. A rotating updraft, or supercell
C. Unstable air
D. A lifting force
7. Identify 3 adaptations that result in aerobically trained individuals having greater SV compared to
untrained individuals (I just need 3 adaptations listed). Please and thank you for your help in advance
Greater force of contraction, volume of blood ejected, and cardiac output result in aerobically trained individuals with greater stroke volume compared to untrained individuals
What increases stroke volume?A greater force of contraction consequently increases the volume of blood ejected with each systole (Systolic Volume). Increasing the stroke volume also increases, as a consequence, the cardiac output (CO = VS x HR).
With this information, we can conclude that greater force of contraction, volume of blood ejected, and cardiac output result in aerobically trained individuals with greater stroke volume compared to untrained individuals
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Moving molecules from low to high
concentration requires energy.
This is the opposite of diffusion.
What is this process called?
Answer:
Active transport
Explanation:
Diffusion is when particles (like perfume) spread out everywhere from an area where there is a lot of it to where there is a little to none of it. Active transport is the opposite. A cell for example would use it's own energy to absorb nutrients when it already has quite a lot. Naturally diffusion would make the particles or nutrients go out of the cell because there is a lot of it inside the cell not outside, so active transport is used to absorb as much as the cell can from around it, even when it is full.
I need help with this. Picture is above and the questions are
1. Which cancer type is most common? Least common?
2. Which cancer type seems to be least treatable? Most treatable?
3. Provide a possible explanation as to why the incidence of basal and squamous skin cancer is so high.
4. Using breast cancer as an example, calculate the percentage of survival for this cancer type.
1. Breast cancer is the most prevalent type of cancer on the list, with 290,560 new cases anticipated in the US in 2022. Prostate cancer and lung cancer are the next most prevalent malignancies.
What is cancer?Cancer is a condition when a few of the body's cells grow out of control and spread to other bodily regions. Since the human body contains billions of cells, cancer can develop practically everywhere.
2. Skin cancer: More people than any other type of cancer develop skin cancer. Additionally, it has the highest rate of recovery from cancer. According to the American Academy of Dermatology, the survival rate for skin cancer is about 100% if it is found early.
3. As people age, their risk of developing basal and squamous cell skin cancer increases. This is most likely due to the accumulation of solar exposure over time. However, younger people are also developing these cancers at an increased rate, most likely as a result of their increased exposure to the sun.
4. 95.5 is the survival rate in in the breast cancer.
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What geological change and event occurs at a convergent boundary?
Plates collide, and a mountain is formed.
Plates collide, and a rift valley is formed.
Plates move apart, and a trench is formed.
Plates move apart, and a volcano is formed.
Answer:
Plates collide, and a mountain is formed
Explanation:
if plates are of equal densites when they collide they will push up and create a mountain chain
whats is the law of pascal
In simple terms, the law of pascal is any force applied to a confined fluid is transmitted uniformly in all directions throughout the fluid regardless of the shape of the container.
Which compound contains a triple bond
Answer:
Alkynes
Explanation:
a bond between two atoms involving six bonding
electrons instead of the usual two covalent single bond
Desenbe how the
exunction of an animal can
cause disrupton in an ecosustem.
Answer:As species go extinct, they are taken out of the food chain. Animals that ate the newly-extinct species have to find new food sources or starve. This can damage the populations of other plants or animals.
Explanation: i hope this helped
What are nucleosome remodelling complexes and describe their function (s).
Answer:
Explanation:
Chromosomal DNA is packaged inside microscopic nuclei with the help of histones. These are positively-charged proteins that strongly adhere to negatively-charged DNA and form complexes called nucleosomes. ... Nucleosomes fold up to form a 30-nanometer chromatin fiber, which forms loops averaging 300 nanometers in length.
what will happen to the length of the day if the earth didnt have a tilt.
The island biogeography model explains
A. the amount of water that surrounds an island
B. the effect the mainland has on the surrounding islands
C. factors affecting the number of different species in a region
D. geographical features of an island
Which hormone allows a woman to produce milk after she gives birth?
1Thyroid-stimulating hormone
2Follicle-stimulating hormone
3Luteinizing hormone
4Prolactin
Prolactin hormone allows a woman to produce milk after she gives birth. Thus, the correct option is D.
What is lactation?Lactation is the process of producing and releasing milk from the mammary glands in breasts. Lactation begins in pregnancy when hormonal changes signal the mammary glands to make milk in preparation for the birth of baby.
It’s also possible to induce lactation without a pregnancy using the same hormones that your body makes during pregnancy. Lactation ends once your body stops producing milk.
Milk ducts increase in size and number when levels of estrogen and progesterone rise. The result is a fuller breast. The mammary glands start to get ready to produce milk.
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If you have 100 apples and you take 30 how many do you have?
Answer:
100 is the answer.........
