Circle the letter of each sentence that is true about life in the ocean.
a. in the euphotic zone, phytoplankton use sunlight to produce food.
b. phytoplankton is the basis of most oceanic food webs.
c. photosynthesis occurs from the surface to deep into the abyssal zone of the ocean. do. the neritic zone covers about 5 percent of the world's ocean, but supports 90 percent of the world's commercial fisheries.
Phytoplankton uses photosynthesis to produce food. The correct answer is a. in the euphotic zone, phytoplankton uses sunlight to produce food.
What is phytoplankton?They offer food for a variety of marine animals in a healthy ecology. Microalgae, sometimes referred to as phytoplankton, are similar to terrestrial plants in that they have chlorophyll and need sunlight to survive and develop.
The tiniest, smallest producers in the plankton group are called phytoplankton. The foundation of aquatic food webs is made up of bacteria and algae. Diatoms, dinoflagellates, cyanobacteria (blue-green algae), and green algae are examples of common phytoplankton.
Green algae and cyanobacteria, sometimes referred to as blue-green algae, make up the majority of freshwater phytoplankton. Although other algae and cyanobacteria can be found, dinoflagellates and diatoms make up the majority of the marine phytoplankton.
Fish and other higher-order marine creatures, such as humans, depend on the phytoplankton food chain in different ways. While some phytoplankton are harmful and can kill fish or contaminate seafood with potent toxins, others are beneficial and are strong determinants of fish production.
Therefore, the answer is a.
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When a firearm is in close proximity to the body—fired from 18 inches away or less—the resulting marks on the body or clothing are referred to as _____?
What is the most common sign during an initial assessment that alerts the nurse that the patient has chronic obstructive pulmonary disease?
Which product comes from algae? A. Yeast B. Carrageenan C. Mushrooms D. Cork
Answer: B. Carrageenan.
Explanation:
Carrageenan is obtained from red edible seaweed which is an alga. Carrageenans are sulfated polysaccharides used for gelling and thickening of food products.It is an important ingredient for several products such as ice creams, beer, condensed milk, sauces and many more. So, from the given options the product obtained from algae is carrageenan.Answer:
The answer is B carrageenan
Explanation:
A condition in a scientific study that is manipulated so that its effects may be observed is the ______
Answer: Independent variable
An independent variable is a condition in a scientific study that is changed or manipulated to test the effects on the dependent variable. The experimenter controls the value of independent variable and its value represent inputs or causes like potential reason for variation.
Additionally, there are tendencies that independent variables are included in a scientific study especially if the experimenter has no intention to test their effect directly.
Which of the following could cause a habitat change? a. introduction of an invasive species b. a wildfire c. a mudslide d. all of the above
Answer: d. all of the above.
A habitat change is a natural phenomena in an ecosystem where a species move to other place due natural or man-made disturbances occurring in an ecosystem. These disturbances can be because of non-availability of resources, natural calamity like drought, flood, forest fires, mudslide etc., introduction of invasive species or predation. An introduction of invasive species will affect the prey population, the prey population will find the habitat not suitable for survival therefore, they will change the habitat. Wildfires and mudslide are natural calamities which will induce habitat change by the species.
The correct answer is option D
Habitat change can be caused due to natural disasters or can be caused due to the artificial means.
Introduction of invasive species can also lead to the change of habitat of native species.
Wild fire and mudslide can also lead to the habitat loss of the animals from their native place.
Hence, all the factors are responsible for the habitat change of the organism.
What are the dangers of rapid binary fission of prokaryotes?
In prokaryotes, cell division is by Scissiparity. These cells usually have a single chromosome that replicates before the two chromosomes separate and the rest of the cell divides in turn.
The rapid division of prokaryotes presents some danger.
* A danger for its own population since there will be a rapid consumption of nutrients present in its environment
* A danger for the environment since there will be not only an increased consumption of nutrients but also an accumulation of metabolic waste.
* A danger to multicellular organisms in the case of an infection.
About 450 million years ago, the terrestrial landscape on earth would have _____.
The organisms on Earth do not run out of raw materials because:
A)every food chain begins with a producer
B)all raw materials are recycled by various processes in an ecosystem
C)all populations within a community interact
D)energy cannot be created
what four main factors prevent bacteria from overpopulating
Final answer:
Bacteria populations are regulated by resource availability, immune system responses, quorum sensing, and the development of antibiotic resistance. These factors, along with environmental conditions, play key roles in hindering bacterial overpopulation and maintaining a natural balance.
Explanation:
Factors Preventing Bacterial Overpopulation
Limiting Resources: Bacteria require various resources to thrive, such as nutrients, water, and oxygen. In their absence, the growth rate of bacteria decreases significantly, preventing overpopulation.
Quorum Sensing and Bacterial Virulence: Bacteria communicate chemically through quorum sensing to regulate gene expression based on population density. This process determines when to express virulence factors, acting as a self-regulation mechanism for population control.
Immune System Response: The human body's natural defense mechanisms can effectively eliminate small numbers of bacteria, but may struggle with larger populations. People with stronger immune systems are better at removing harmful bacteria.
Antibiotic Resistance: The misuse of antibiotics leads to the natural selection of resistant bacteria strains. Over time, this results in a population more resilient to common treatments, requiring the evolution of new strategies to control bacterial overpopulation.
In addition to these, environmental factors such as temperature, pH, and predation by other microorganisms can limit bacterial growth and proliferation. Maintaining good hygiene practices without overusing antibacterial products helps in preserving a healthy microbial balance and avoiding the rise of antibiotic-resistant strains.
You want to examine the structure of the protein coat of a virus by microscopy. which microscope is your best choice, and why?
Gregor Mendel crossed homozygous tall parts (TT) with homozygous short plants tt what conclusion did Mendel draw?
Gregor Mendel concluded that inheritance is particulate and that traits are passed individually from parents to offspring, with tall being dominant (TT or Tt) and short being recessive (tt), leading to discrete inheritance patterns rather than blending.
Gregor Mendel crossed homozygous tall plants (TT) with homozygous short plants (tt). Mendel observed that the offspring of this cross, the F1 generation, were all tall plants. This result contradicted the blending model of inheritance prevalent at the time, which would have predicted medium-sized plants. Instead, Mendel concluded that inheritance is particulate, meaning that traits are inherited as discrete units that remain separate through generations.
When the F₁ generation (all Tt) self-pollinated, the resulting F₂ generation exhibited a 3:1 ratio of tall to short plants. This indicated that tall was the dominant trait and short was recessive, and that traits are passed to offspring independently of each other. From this, Mendel formulated the laws of segregation and independent assortment.
The F₃ generation further validated these findings, as self-crossing dominant- and recessive-expressing F₂ plants showed that green seeds were always homozygous recessive (yy), and that yellow seeds had a mix of homozygous dominant (YY) and heterozygous (Yy) genotypes leading to the same 3:1 segregation pattern. This further illustrated Mendel's conclusions about the predictability of inheritance patterns.
How can doctors and genetic counselors calculate the probability of a child inheriting a disease?
The doctors and genetic counselors can use a punnett square in calculating the probability of a child inheriting a disease from the parents. If the genotypes or genetic compositions of the parents are determined, then the chance of the baby having a particular trait will also be determined including the possible illness that might be passed on.
A Punnett square is a diagram of the possible genotypes of an offspring arising from a particular breeding experiment revealing possible combinations of the parents’ gametes that are encapsulated in a tabular format.
A basic experiment involves a minimum of ________ participant group(s). three four one two
A basic experiment involves a minimum of two participant groups.
This is because a basic experiment involves comparing two or more groups that are exposed to different treatments or conditions to determine whether there are any significant differences in the outcome. A research study typically consists of a minimum of two groups: an experimental group and a control group.
The experimental group receives the intervention, while the control group does not. The control group is used as a comparison to the experimental group in order to determine whether any changes in the outcome are the result of the intervention or simply due to chance or other factors. There are some experiments that involve more than two groups, but two is the minimum number required for a basic experiment.
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what is the difference between energy conservation and energy sustainability
Streptococcus pneumoniae is a kind of bacterium that what?
a.causes infections in humans.
b.causes several types of cancer.
c.supports the human immune system.
d.aids in the digestion of food
Mendel's principle of dominance suggests a _____ (recessive, diploid, dominant) gene will always be masked by the presence of a ______ (recessive, haploid, dominant) gene.
Answer: The correct answer for the blanks are-
1) Recessive gene
2) Dominant gene
Explanation:
According to Mendel's principle of dominance, offsprings with heterozygous genotype (that is having two different alleles, dominant and recessive) exhibit the phenotype of dominant allele as it masks the expression of recessive allele.
Thus, a recessive allele (such as t for dwarf plant) will always be masked by the presence of dominant allele (such as T for tall plant).
Therefore, a Tt (heterozygous pea plant) genotype plant will express tall trait and mask dwarf trait.
Thus, according to this law, the right answer for blanks are-
1) Recessive gene
2) Dominant gene.
How is iodide brought into follicular cells from the bloodstream in the thyroid gland?
While you are sleeping, approximately how much of the energy your cells use is derived from fats?
The percentage of energy derived from fat while sleeping is 60-70 percent per day.
Further explanation
Calories are units for measuring energy. The energy needed by the body to breathe, to take selfies (which can sometimes be dozens of times a day), fights with girlfriends, eat, and so on.
Fat is an element (compound) that exists in living things (humans, animals, and plants). Fat functions to maintain body temperature, protect internal organs and help the absorption of vitamins A, D, E, and K in our body.
It can be concluded that Calories are a unit of measuring energy, while fat is a compound whose measuring unit is grams. So, the forms of calories and fat are different. Fat is part of the food, while calories are the energy contained in the food.
There are three types of burning of calories in the body which are as follows:
Primary CombustionBasal Metabolic Rate, to carry out its function so that we stay alive, all internal organs of the human body burn calories, including activities while sleeping. How many? An average of 60-70 percent of the total calories spent a day.
Second BurningDigestion, which means the process of "transferring" nutrients and energy from food into the body. To digest food, we burn calories. How many? An average of 10-15 percent of the total energy spent a day.
Third BurningTo move, as small as, to high-intensity exercise, we burn calories. On average about 15-30 percent of the total energy, we spend a day.
So, for example, in one day you eat food with a total energy of 2,000 calories. Then it turns out that your BMR is 1,400 calories. Then to digest food, you spend 300 calories, and from exercise that day you spend 300 calories. That means the total energy you spend is 1,400 plus 300 plus 300 calories or 2,000 calories. This means you do not burn fat.
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What is the process of removing a shrimps digestive tract called?
During the menstrual cycle, the main source of progesterone is
What is the natural element most closely associated with wuwei?
All of the cells in your body need energy to function. the cellular form of energy is called __________. glycogen mitochondria creatine phosphate adenosine triphosphate
An individual who displays the disease sickle-cell anemia must have inherited the deleterious allele from both phenotypically normal parents. what, therefore, is this individual?
A geothermal plant has been built in a location. Which of these is the most likely impact of the plant on the location?
A.) variations in the types of fossils found in different continents
B.)variations in the types of rocks that formed mountains in different continents
C.) similarity in the ocean floor temperature along different coastlines
D.)similarity in the patterns made by glaciers along different coastlines
Answer: B.) Variations in the types of rocks that formed mountains in different continents.
Explanation:
Geothermal energy is the energy that is harnessed from the geosphere in the form of hot water. The groundwater present in the geosphere is heated by the heat present in the geosphere. The water released with pressure from the site called as hot spring. The hot water is the source of geothermal energy.
The groundwater will come out from the earth will pressure this will create a disturbance in the geosphere. The rocks are the parts of the geosphere. The rocks are likely to be affected by the liberation of water and building up of the geospheric plant.
The "highly specific molecular scissors" that cut dna into fragments are called
Which level of ecological organization includes both biotic and abiotic factors?
an ecosystem
a population
a community
an organism
Answer: an ecosystem
Explanation:
An ecosystem is an ecological organization which includes both biotic and abiotic factors. The biotic factors include all the living beings such as plants, animals, humans and microbes. The abiotic factors include all the non- living components of the environment such as sunlight, water, soil and wind. In an ecosystem living being interact with their non-living environment. The abiotic factors are necessary for sustaining the life of the biotic factors.
In any population of humans, sex-linked diseases such as hemophilia, A) only occur in males. B) occur more frequently in males. C) occur more frequently in females. D) occur equally in males and females.
The correct answer would be B
A client is being prepared for surgery to have placement of a percutaneous endoscopic gastrostomy (peg) tube. the client asks why the peg tube is preferred over the existing nasogastric tube that is being used for feedings. what explanation does the nurse give for why a peg tube is preferred for administering a tube feeding?
From personal experience, a peg tube is way better for long-term use. It's not as painful as a nose tube in the long run, and won't cause nose bleeds. Also, you won't need to worry about coughing or vomiting up the tube.
The (maximum/optimum/selective) growth temperature is the temperature at which an organism exhibits the highest growth rate.