Answer:
Option-A
Explanation:
Radial symmetry refers to the symmetry in which the organism can be cut into the same half through any plane which can be observed in the organisms belonging to Cnidarians.
The organism with radial symmetry do not show a distinct head region and are considered to be passive drifters like observed in the corals, sea anemones, starfish.
Thus, Option-A is correct.
Explain the significance of Jacques Cousteau’s work as a filmmaker.
Final answer:
Jacques Cousteau was a pioneering filmmaker who raised awareness about marine life and conservation through his influential documentaries, such as 'The Silent World'. His work helped inspire global interest in oceanography and sustainable practices, as well as set a new standard for ethnographic filmmaking.
Explanation:
The Significance of Jacques Cousteau's Work as a Filmmaker
The late French explorer Jacques Cousteau was not only a pioneering marine conservationist but also an influential filmmaker. His films about the underwater world provided a unique and accessible look at marine biodiversity, inspiring viewers by showcasing the beauty and complexity of marine life. Through his work in film, Cousteau significantly contributed to raising awareness about the importance of preserving our oceans and the negative impacts of human activity on marine ecosystems.
One of Cousteau's most notable works is The Silent World (Le Monde du silence), which was released in 1956 and became an instant classic, allowing the audience to experience the ocean's wonders. The film depicted Cousteau's encounters with marine life, such as his dive into a chamber surrounded by Bluefin Tuna and bonito, leaving a profound impression on viewers. This type of vivid storytelling fostered a global interest in oceanography and encouraged the development of sustainable fishing practices amidst growing concerns about overfishing and the need for conservation.
Cousteau's impact on filmmaking extended beyond marine conservation. His documentaries set a new standard for ethnographic film, influencing future generations of filmmakers in how to portray environmental issues and creating a paradigm for the relationship between filmmaking, research, and education. As a result, his work has left an enduring legacy, underscoring the pivotal role of visual storytelling in environmental activism and education.
What do eukaryote cells have that prokaryotic cells do not?
Answer:
https://e1.portalacademico.cch.unam.mx/alumno/biologia1/unidad1/procariotas_eucariotas/semejanzasydiferencias
Explanation:
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Phalloidin is a peptide that can be conjugated to fluorescent dyes, such as fluorescein, and used to label actin in cells. Phalloidin-fluorescein was added to dividing, ciliated cells in culture. Where will the fluorescence be localized in the cells when looking at the treated cultures using fluorescence microscopy?
a. at the inner surface of the inner nuclear membrane
b. at the inner surface of the plasma membrane
c. microtubule-organizing centers (MTOC) cilia
d. more than one of the above.
Answer:
b. at the inner surface of the plasma membraneExplanation:
Phalloidin is a type of toxic substance that is found in dead cap mushrooms. It has a bicyclic structure of heptapeptide. It has a great ability to bind with the filamentous actin selectively and tightly. So it is used in the fluorescent microscopic study to detect or identify the structure or position of the F- actin. Due to phalloidin small structure, generally it is used in the labeling of cellular protein during the fluorescent microscopy to increases high resolutions. Since most of the actin is connected with the inner surface of the plasma membrane so the cells that are treated with phalloidin, has fluorescence at the inner surface of the plasma membrane.The m phase checkpoint ensures that all chromosomes are attached to the mitotic spindle. If this does not happen, then
Answer:
The cells would most likely get arrested in the metaphase stage.
Explanation:
Certain points found in the cell cycle of eukaryotes, at which the advancement of the cell to the next stage of the cycle can be prevented until and unless all the conditions become favorable are known as the check points. One of these checkpoints is the M checkpoint, which is found close to the termination of the mitosis metaphase stage.
It is also known as the spindle checkpoint as it determines the accurate attachment of the sister chromatids with the spindle microtubules. At the time of the anaphase stage, the distinction of the sister chromatids is an irreversible step, thus, unless and until each sister chromatids pair are attached strongly with the spindle fibers originating from the reverse poles of the cell, the cycle will not progress further.
Therefore, if all the chromosomes are not attached to the mitotic spindle the M checkpoint will not allow the cell to go the next stage and will arrest the cell in the metaphase stage.
The M phase checkpoint ensures that all chromosomes are attached to the mitotic spindle. If this does not happen, then the cell will be arrested in metaphase.
The cell cycle can be divided into interphase and a mitotic 'M' phase in which the cell divides. The M phase can in turn be divided into prophase, metaphase, anaphase and telophase.The M checkpoint ensures the correct attachment of chromosomes to the mitotic spindle. During metaphase, the chromosomes align at the equator (middle) of the cell.In conclusion, the M phase checkpoint ensures that all chromosomes are attached to the mitotic spindle. If this does not happen, then the cell will be arrested in metaphase.
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You have arrived on the scene of an incident involving an explosion. People in the immediate vicinity are all experiencing runny noses and difficulty breathing. Some are having convulsions. You suspect a terrorist incident involving a:
A. biological agent
B. blister agent
C. nerve agent
D. blood agent
Answer:
Nerve agent
Explanation:
A nerve agent is a chemical in which on exposure to humans affects the functioning of the nervous system. These chemicals are known to disrupt the process by which messages are transferred to the organs from the nerve. This disruption occurs by blocking the activity of acetylcholinesterase, which is responsible for the catabolism of a neurotransmitter, acetylcholine.
On exposure to a nerve agent, the muscles of the body become paralyzed and early symptoms is production of excess mucous such as in runny nose, pupil constriction and also difficulty in breathing.
These agents are sometimes used in chemical warfare. Examples include sarin, tabun etc.
"" Generally, a very _______ percent of Na + in the tubular fluid is reabsorbed, and the reabsorption takes place ________.
high, only in the nephron loop
high, along the entire tubule
small, only in the nephron loop
small, along the entire tubule
Answer:
high, along the entire tubule
Explanation:
During meiosis I, the two kinetochores of sister chromatids fuse and kinetochore microtubules from one pole of the cell attach to the fused kinetochore. This is important because it ensures that during anaphase I
Answer:
sister chromatids are pulled toward the same pole of the cell.
Explanation:
Meiosis can be defined as process where a single cell is divided twice in order to produce four cells( i.e sex cells which are; Sperm and Eggs) which contains half the original amount of genetic information.
Meiosis can be divided into nine different stages. when the cell divide for first time is referred to as *meiosis I* and the second time it divides it's referred to as meiosis II.
During Meiosis The cell divide twice to form four daughter cells, the daughter cells contains half the number of chromosomes of the parent cell( haploid).Our sex cell is produced by Meiosis.
During meiosis I, the two kinetochores of sister chromatids fuse and kinetochore microtubules from one pole of the cell attach to the fused kinetochore. This is important because it ensures that during anaphase I
How do cigarettes and radiation cause cancer? View Available Hint(s) How do cigarettes and radiation cause cancer? by destroying healthy cells by repressing the cell cycle by toxic chemicals (in smoke) or radiation that can damage the DNA in cells by destroying DNA by activating DNA mismatch-repair enzymes
Answer: B. by toxic chemicals (in smoke) or radiation that can damage the DNA in cells.
Explanation:
The carcinogens presents in cigerates covalently bind to DNA and form DNA adducts which results into miscoding (e.g., insertion of the wrong base) during replication of DNA and this genetic mutation causes uncontrolled cellular growth which causes cancer.
Ionising radiation including X-rays, radioactive particles, and gamma rays,can cause cancer by damaging DNA. high-energy radiation damages DNA and cause genetic mutation same as cigerates and causes cancer.
Both toxic chemicals (in smoke) or radiation damages DNA inthe cells which leads to cancer.
Hence, the correct option is B.
During which phase of mitosis do sister chromatids separate?
Answer:
I think Anaphase II
Explanation:
Hope this help
Sister chromatids separate during the anaphase phase of mitosis. This critical phase ensures that each new cell has a precise copy of the genetic material contained in the original cell.
Explanation:Sister chromatids separate during the anaphase phase of mitosis. It's a critical juncture in cell division when replicating chromosomes split into two new identical sets. The chromatids, initially paired together at the beginning of mitosis, comply with the pull of the spindle fibers, moving each sister chromatid to opposite ends of the cell. The separation of sister chromatids ensures that each new cell formed during division will have a precise copy of the genetic material contained in the original cell.
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What are some problems with using fossil fuels?
Anyone know this?????
Answer:
Please see the attached photo for a filled-out worksheet!
Explanation:
The following diagram shows an oceanic food web. At what trophic level do the killer whales primarily feed?
Killer whales, based on a general oceanic food web, primarily feed at the fourth trophic level. This is because they feed on secondary consumers like seals, positioning them as tertiary consumers or apex predators.
Explanation:In a food web, the trophic level refers to the position an organism occupies based on its feeding habits. Primary producers make up the first trophic level, followed by herbivores or primary consumers at the second trophic level, and carnivores or secondary consumers make up the third trophic level. If Killer Whales feed on organisms like seals, which are secondary consumers, then Killer Whales would be positioned at the fourth trophic level—also known as tertiary consumers or apex predators.
This is based on a generalized oceanic food web and may not represent every environment. Additionally, depending on the specific diet of the Killer Whale in different environments, it could occupy more than one trophic level. For example, if a Killer Whale also eats fish, it could be a secondary as well as a tertiary consumer.
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What are the four major functions all cells perform?
Answer: Reproduce, make energy, waste removal, react to changes
Explanation:
Which of the following has the longest wavelength?
radio waves
infrared light
microwaves
red light
Answer:
radio waves
Explanation:
Radio waves have the longest wavelength out of all options provided due to their low frequency.
Explanation:Out of the options provided, radio waves have the longest wavelength. Wavelength is inversely proportional to frequency, which means that the lower the frequency, the longer the wavelength.
In terms of the electromagnetic spectrum, radio waves have the lowest frequency and therefore the longest wavelength. Infrared light, microwaves, and red light all have higher frequencies and thus shorter wavelengths compared to radio waves. Value wise, Radio waves can have a wavelength as large as 100 kilometers or more while the other ones have much smaller wavelengths.
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A nurse observes a few small, yellow nodules on the cervix of a client during the speculum exam. They are not painful or odorous, and a thin, clear discharge is present. The nurse recognizes that these are most indicative of what type of condition?A) Cervical eversionB) Nabothian cystsC) Columnar epitheliumD) Chlamydia infection
Answer:
B) Nabothian cysts
Explanation:
Nabothian cysts are tiny cysts filled with mucus (secreted by the cervical glands), from on the surface of cervix.
These cysts are smooth and appear white or yellow in color. They do not cause pain, discomfort, or other symptoms. But they maybe a cause for bleeding between periods, unusual clear discharge, or pelvic pain,
Sometimes these small, yellow nodules (bumps) on the cervix are valled cervical cysts , mucinous retention cysts, or epithelial cysts.
Nabothian cysts are common but they aren't a threat to health and they aren't a sign of cervical cancer.
What information is presented as a fact in the article? Check all that apply.
The data cannot be studied in context.
It is difficult to tell if fluoride causes this cancer.
The sources diagnosing the cancer may be unreliable.
Answer:
It is difficult to tell if fluoride causes this cancer.
Explanation:
The U.S. public health service has diverse team with more than 6500 employees. Their mission is to promote health and safety of the people of United States. The fluoride is added to drinking water since 1940s and this process is called water fluoridation. It is difficult to tell if the fluoride causes cancer but there has not been any relationship found between fluoridated water and cancer. Fluoridated water can reduce and reverse the tooth decay.
Answer: the second one
“it is difficult to tell if fluoride causes this cancer”
Explanation: On edg.2020
Blood cells that function to fight infection are called ________.
Answer: Neutrophils
Explanation: For example, are one of the body's main defenses against bacteria. Neutrophils kill bacteria by ingesting them
suppose you found a bone of a mastodon which had 6.25%c14and93.75%n14 how long ago did this animal die
Answer:
t= 3886.18 years old
Explanation:
Whenever an animal dies de C14 and N14 begin to disintegrate in such a way that the proportion between C14 and C12 decreases, with a semi-disintegration period of 5.730 years, T. To get to know how long it takes an element to disintegrate, we must use this semi-disintegration period, which is the time it takes until the amount of the element is reduced to its half.
We can find the age of the fossil, t, by using the next formula:
t = - (T x ln (C14))/ ln (2)
t = - (5730 x ln (0.625)/0.693
t= - (-2693.12)/0.693
t= 3886.18
Radiocarbon dating is the process of determining the age of organic material or fossils by using the radioactive isotope of carbon.
The period or the age of the animal is 3886.18 years old.
The radioactive isotope of carbon and nitrogen is used to date the age of a fossil.
Organic compounds like carbon and nitrogen start to degrade. The proportion between the isotopes of carbon, carbon-14, and carbon-12 decreases, it takes a semi-disintegration period of 5.730 years.
The time taken to semi-disintegrate the fossil is the time taken by the compound to reduce to half.
The age can be calculated by:
[tex]\text t &= \dfrac{\text T \times \text {ln (C14)}} {\text {ln (2)}}\\\\\\\text t &= \dfrac{5730 \times \text {ln (0.625)}} {0.693}\\\\\\\text t &= \dfrac{-2693.12}{0.693}\\\\\text t &= 3886.18[/tex]
Therefore, the age of the fossil is 3886.18
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Which types of carbon-based molecules can be broken down to make ATP?
Answer:
Carbohydrates. Depending on the carbon-based molecule broken down, the amount of ATP produced will be less or more.
Explanation:
PLEASE HELP ME ASAP!!!!
Which of the following is an example of mutualism?
a) a fish protecting a shrimp who builds a burrow for the pair to share
b) a peacock courting and mating with a peahen
c) crayfish and minnows resting under the same rock
d) two snake species with the similar markings advertising their toxic venom
Answer:
A
Explanation:
The answer is a because mutualism is an interaction between 2 or more species where each species benefits.
Answer:
A fish protecting a shrimp who builds a burrow for the pair to share
Explanation:
The fish is getting shelter from the shrimp who gets protection from the fish- they are both benefiting from the situation.
The free energy for the oxidation of glucose to CO₂ and water is -686 kcal/mol and the free energy for the reduction of NAD+ to NADH is +53 kcal/mol. What is the main reason that only two molecules of NADH formed during glycolysis when it appears that as many as a dozen could be formed?
Answer: The main reason why only 2 molecules of NADH is formed during glycolysis when it appears that as many as a dozen could be formed is because during glycolysis,most of the free energy that are available from the oxidation of glucose remains in one of the products of glycolysis known as pyruvate which acts like glucose but doesn't undergo metabolism.
Glycolysis is the splitting of sugar molecules into useable/ manageable forms,it can also be seen as the aerobic catabolism of sugar inorder to produce energy in the form of ATP,NADH and PYRUVATE.The following are the products of glycolysis; pyruvate,2 molecules of ATP and 2molecules of NADH.
Pyruvate are used in aerobic respiration or anaerobic respiration if oxygen is not available.
Please help! Match each organism with the correct trophic level it occupies in the food chain.
Blueberry: 1st Trophic Level
Rabbit: 2nd Trophic Level
Snake: 3rd Trophic Level
Cat: 4th Trophic Level
Hope this helps :P
plz give me the brainliest if it does : )
Answer:
The blueberry we go on the fourth the The rabbit would go next I think the snake would go after that and then the cat.
Explanation:
The snake and the cat might be switched but I’m pretty sure that the cat would be able to eat the snake easier than the snake would be able to get the cat so all I can say is go with your gut on that one .
Several types of plant species grew in an empty lot. The city counsel decided to turn the lot into a park and planted grass alone to create a playing field. The ecological factor that was MOST LIKELY affected by the change was the lots ___________.
Answer:
Biodiversity
Explanation:
In the given question, many species of plant species used to grow in the empty lot. The plant species could have provided a home to many animal species. This lot thus formed a small level of the biological ecosystem which is composed of biodiversity.
This lot was changed to a park by the city council which then changed the ecosystem of the area and the main factor that was affected by this change is Biodiversity.
Thus, Biodiversity is correct.
Final answer:
The transformation of a diverse lot into a grass playing field likely most affected the lot's biodiversity, which impacts ecosystem processes, nutrient cycling, and interactions with insect predators.
Explanation:
The ecological factor that was most likely affected by the change from an area with several plant species to a park planted with grass alone for a playing field was the lot's biodiversity. The conversion to a grass field would lead to a significant loss in plant species diversity. This, in turn, can affect various ecosystem processes such as litter decomposition, nutrient cycling, and the presence of insect predators. Moreover, such changes could spill over and affect adjacent areas through altered biophysical processes and biodiversity, given that urban parks can support different species, including butterflies in the case of adjoining forests.
Light waves travel and strike a mirror. If the angle of incidence is 30°, what is the angle of reflection?
30°
180°
150°
60°
What type of information is encoded within genes
a gene is a sequence of nucleotides in DNA or RNA that encodes the synthesis of a gene product, either RNA or protein.
Final answer:
Genes encode information in the form of sequences of nitrogenous bases in DNA, grouped into codons in mRNA, which specify amino acids for proteins. The genome contains all hereditary information, directing cells to produce specific proteins essential for life. This genetic information is passed down through generations.
Explanation:
The information encoded within genes is essentially the blueprints for building an organism and is found in the organism's DNA. This information is stored as a sequence of nitrogenous bases represented by the letters A (adenine), C (cytosine), G (guanine), and T (thymine) in DNA, which translate to A, C, G, U (uracil) in mRNA. These sequences are grouped into sets of three called codons, and each codon specifies a particular amino acid, the building block of proteins, or signals the start or end of protein synthesis.
An organism's genome comprises all the hereditary information, which includes both the genes and non-coding sequences of DNA. Just like instructions in a manual lead to the construction of a model airplane or the knitting of a sweater, the DNA 'instructions' guide the cell in the production of proteins. The resultant proteins are critical for the cell's structure and function, with various proteins like interleukin-2 and alpha-2u-globulin serving as examples of the diversity of structures that are directed by genetic information.
Each gene on a chromosome can be seen as a section of DNA that provides the code not only for the corresponding RNA but also for the proteins required for all life processes. Thus, through the replication of DNA, genetic information is faithfully transmitted from one generation to the next, ensuring the continuity of biological traits.
How are living things organized into domains and kingdoms? Check all that apply.
There are three domains.
There are six domains
The domains include Bacteria, Archaea, Eukarya, Plants, Fungi, and Animals
The domains include Bacteria, Archaea, and Eukarya
There are three kingdoms.
There are six kingdoms
The kingdoms include Bacteria, Archaea, Eukarya, Plants, Fungi, and Animals,
Answer:
Organisms with eukaryotic cells, including humans, are in domain Eukarya. Organisms with prokaryotic cells are in either domain Bacteria or domain Archae. ... These domains have been broken down into six kingdoms--Eubacteria, Archaebacteria, "Protista," Fungi, Plantae, and Animalia.
Explanation:
Answer:
Organisms with eukaryotic cells, including humans, are in domain Eukarya. Organisms with prokaryotic cells are in either domain Bacteria or domain Archae. ... These domains have been broken down into six kingdoms--Eubacteria, Archaebacteria, "Protista," Fungi, Plantae, and Animalia.
ANSWERS ARE (A) (D) (F)
Explanation:
How might the populations living in the communities affected first by drought and then by wildfires be impacted over time?
Answer:
Truthfully all animals in that certain communities would be affected they all depend on everything in their communities.
Explanation:
In which of the cultures was the concentration of toxins the highest?
Eggs are carried from the ovary to the uterus by the
Answer:
Is their any choices to choose from?
Explanation:
Answer:
Fallopian tubes.
Do you think Peacocks would be in Hardy-Weinberg Equilibrium? Why or why not?
Peacocks would not be in Hardy-Weinberg Equilibrium
Explanation:
This can be justified by the mating patterns of the female peacocks. They do not choose their mates randomly but look out specifically for bright attractive plumage in their male partners and then select them.
Hardy-Weinberg's Equilibrium of evolution mechanism was based on facts like random mating, no natural selection, mutation, absence of gene flow, and infinite population size.
They stated that organisms mate randomly with each other without any specific or a particular preference in the phenotypes of their opposite mates