Select all that apply.
Which characteristics do prokaryotes and eukaryotes have in common?
can be single- or multi-celled
have DNA
have organelles
don't have a distinct nucleus
have a surrounding cell membrane
The common characteristics between prokaryotes and eukaryotes are: (2) have DNA; (5) have a surrounding cell membrane.
Prokaryotes are typically single-celled organisms. They lack membrane-bound organelles and only contain simple structures like ribosomes and plasmids. Prokaryotes do not have a distinct nucleus, hence their genetic material lies open in the cytoplasm. This structure of genetic material is commonly known as nucleoid.
Eukaryotes can be either single-celled or multi-celled. They have membrane-bound organelles such as the nucleus, mitochondria, endoplasmic reticulum, etc. Eukaryotes have a true nucleus that houses the genetic material (DNA) separated from the rest of the cell by a nuclear membrane.
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How might a fish react in a optimal zone, stress zone, and intolerance zone?
Fish show distinct behavioral and physiological responses based on the environmental zone: optimal zones support healthy and natural behaviors, stress zones cause altered and stress-related behaviors, while intolerance zones lead to severe stress and often mortality.
Fish react differently based on the environmental zone they are in. Here's a breakdown of their reactions in various zones:
Optimum Zone:
Experience ideal conditions for survival and growth.Exhibit natural behaviors such as regular feeding, swimming, and reproduction.Lower stress levels and enhanced overall health.Stress Zone:
Encounter suboptimal conditions that challenge their homeostasis.Show altered behaviors like reduced feeding, increased hiding, or unusual swimming patterns.Higher stress levels that may lead to weakened immune responses and increased susceptibility to diseases.Intolerance Zone:
Face extreme conditions that surpass their tolerance limits.Exhibit severe stress responses, such as cessation of feeding and irregular, frantic swimming.High likelihood of mortality if conditions persist.A client is en route to the emergency department after sustaining a gunshot wound to the chest. Which priority nursing action should the nurse take to prepare for the arrival of the client?
An organ system is a group of organs that Question 8 options: a. are made up of similar cells. b. are made up of similar tissues. (c. ) work together to perform a specific function. <----? d. work together to perform all the functions in a multicellular organism.
Final answer:
An organ system is a group of organs that work together to carry out a particular function vital to a multicellular organism's survival, such as the circulatory system which includes the heart and blood vessels.
Explanation:
An organ system is a group of organs that work together to perform a specific function (c). This level of biological organization involves multiple organs that collaborate to execute complex tasks necessary for the survival and proper functioning of multicellular organisms. For example, the circulatory system includes the heart and blood vessels and is responsible for the transport of nutrients, oxygen, and waste products throughout the body.
In most multicellular organisms, specialized cells form tissues, and these tissues combine to create organs. These organs are not isolated entities; they come together to form organ systems. Each organ system has a distinctive role but also works in concert with other systems to maintain the organism's overall health and function. For example, the skeletal system provides structure and protection for internal organs, while also collaborating with the muscular system to facilitate movement.
Which event occurs first during viral infection? the viral genome and proteins enter the host cell. the virus fuses its envelope to the host cell membrane. the viral genome is transcribed. viral proteins and mrna molecules are assembled?
In the list provided above, the event which occurs first during viral infection is that the virus fuses its envelope to the host cell membrane. This is followed sequentially by the following steps: the viral genome and proteins enter the host cell, viral proteins and mRNA molecules are assembled, and the viral genome is transcribed.
The virus fuses its envelope to the host cell membrane.
Why is pyruvate converted to lactate in anaerobic conditions?
3. Climate change (an abiotic factor) has slowly decreased habitat for the arctic seals. Predict how a reduction in habitat could change the capture efficiency of the killer whales. How would this affect the carrying capacities for both the whales and the seals?
4. If another source of prey were available to the whales, what changes in population size would you expect for the seals and the whales? (4 points)
5. In this lesson, you learned about two patterns of population growth and decline, the sigmoid and peak phenomena. Does the seal and killer whale relationship represent a sigmoid or peak phenomenon? Please provide supporting details. (6 points)
6. What are the limitations of the population dynamics lab? Is the lab activity a realistic representation of an arctic marine ecosystem? Note: Please provide detailed support for your opinion. (8 points)
A reduction in Arctic seal habitats would decrease food availability for killer whales impacting their populations and carrying capacity. A new source of prey could relieve pressure off seals and increase both seal and whale populations. The population change follows a sigmoid pattern and while the population dynamics lab is useful, it oversimplifies the real-world complexity of an Arctic marine ecosystem.
Explanation:As an impact of climate change, a reduction in Arctic seal habitats would likely decrease the food availability for killer whales, making them less effective at capturing their prey. This reduction in capture efficiency would likely reduce the carrying capacity for killer whales as fewer individuals would be able to be supported by the available resources. Similarly, with the decrease in habitat size, the carrying capacity for Arctic seals would also likely decrease.
If a new source of prey became available to the killer whales, it could potentially relieve some predatory pressure from the seals and their population size might increase. The whale population could increase as well if the new prey source is abundant.
In the context of population dynamics, the relationship between seals and killer whales seems to correlate with a sigmoid (S-shaped) pattern of growth. Initially, when resources are abundant, population growth is exponential. However, as the population reaches its carrying capacity and resources become scarce, growth slows and eventually levels off.
As an educational tool, the population dynamics lab has a few limitations. Though it simulates interactions between predator and prey, it doesn't fully capture the complexity of real-world ecosystems. In an actual Arctic marine ecosystem, multiple species are interrelated and abiotic factors also play a critical role.
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Carbohydrates and fat both
a. Can be used as an energy source by organisms
b. Can be bonded together to construct DNA molecules
c. Are made up of the glucose monomer
d. Are monomers that can be made into large polymer chains
Complete paralysis of the diaphragm occurs if the spinal cord is crushed or destroyed just below the c5 region.
What organic molecules functions to help speed up biological chemical reactions?
When water diffuses into a plant cell and builds up firm pressure that is called?
Which organelle is responsible for the production of atp?
Which of the following organisms causes malaria?
Anopheles mosquitoes
Rats
Flies
Protozoan
The correct answer is option Protozoan.
Malaria is caused by the Protozoan parasite called Plasmodium. It is transmitted by mosquito female Anopheles which bites between the dusk and dawn.
It is an acute febrile illness with an incubation period of 7 days or longer. its symptoms include chills, headache, weakness, abdominal pain, et cetera.
The initial symptoms is mild but later it can be severe.
The organism that causes malaria is a protozoan. The correct option is D.
The protozoan species Plasmodium is responsible for causing malaria in humans.
Malaria is a vector-borne disease transmitted to humans through the bites of infected female Anopheles mosquitoes.
These mosquitoes serve as the vector for the Plasmodium protozoan, which enters the human bloodstream during a mosquito bite and infects red blood cells, leading to the onset of malaria.
When an infected mosquito bites a human, it injects sporozoites, which are the infective form of the Plasmodium parasite, into the bloodstream.
From there, the sporozoites travel to the liver, where they multiply and develop into merozoites.
Therefore, the correct option is D.
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Complete question:
Which of the following organisms causes malaria?
A. Anopheles mosquitoes
B. Rats
C. Flies
D. Protozoan
When the blood glucose level rises after a meal, the first organ to respond is the:
a. gallbladder.
b. kidney.
c. liver.
d. stomach.
e. pancreas?
Answer: Option E. Pancreas
Explanation:
When the blood glucose level rises after a meal, the first organ to respond is the Pancreas.
When the blood sugar levels rise, insulin is released by pancreas. Insulin released in the bloodstream helps to absorb the sugar and allows the liver to store sugar. Like this the process lowers the blood sugar level.
When blood sugar levels gets lower the pancreas are allowed to release glucagon, which allows the liver to release the stored sugar. If the blood sugar levels rise, the release of glucagon is stopped.
Hence, the correct option is Pancreas.
When water and nutrients from the soil travel up from the roots of a plant through the stem to the leaves, they do so in which of the following structures?
Answer:
Xylem
Explanation:
In bacterial cells, ribosomes are packed into the cytoplasmic matrix and also loosely attached to the plasma membrane. what is the function of ribosomes?
a.site of energy production
b.site of protein synthesis
c.site of genetic reproduction
True or false: the firing intensity of a neuron determines the intensity of the response
What is the most appropriate recommendation for administering tdap to pregnant patients?
The whooping cough vaccine is harmless for the patient and the baby. Doctors and midwives who major in in caring for pregnant women approve that it is significant to be acquired throughout the third trimester of pregnancy. Adults who are 19 years old and older must only acquire one dosage of the Tdap vaccine.
T/F The protein found in large amounts in the outermost layer of epidermal cells is collagen.
Meiosis is responsible for genetic variation while mitosis is responsible for genetic _____________.
segregation
sameness
Meiosis and mitosis are both forms of division of the nucleus in eukaryotic cells.
Meiosis is responsible for genetic variation while mitosis is responsible for genetic sameness. Sameness, because mitosis produces two daughter cells with the same genetic component as the parent cell. Meiosis on the other hand produces haploid sex cells or gametes (which contain a single copy of each chromosome) from diploid cells (which contain two copies of each chromosome).
Atom A has an atomic number of 19 and mass number of 40. Atom B has an atomic number of 20 and a mass number of 40. Which of these is an accurate statement?
A) Atom A has more protons than Atom B.
B) Atom A has one less proton and one more neutron than Atom B.
C) Atom A has an extra nucleon compared to Atom B.
D) Atom A has one more proton and one more electron than Atom B.
Atom A has one less proton and one more neutron than Atom B, as the mass number is the same but the atomic number differs by one. Hence, option B is correct.
The correct statement about Atom A with an atomic number of 19 and mass number of 40, and Atom B with an atomic number of 20 and a mass number of 40, is that Atom A has one less proton and one more neutron than Atom B. This is because the atomic number indicates the number of protons and the mass number is the sum of protons and neutrons. Since Atom A and Atom B have the same mass number but different atomic numbers, it can be deduced that Atom A must have one less proton and consequently one more neutron than Atom B in order to maintain the same mass number of 40.
Why do you think the motor and somatosensory cortices are located adjacent to one another?
Which of the following factors can influence advances in science and technology?
Factors like R&D, convergence, and the rate of advance influence scientific and technological progress. Biotechnology has affected our lives by advancing medical technology and improving agricultural yields. These factors have profound impacts on modern life.
Factors Influencing Advances in Science and Technology
Advances in science and technology are influenced by several factors. Here are three key ones:
Research and Development (R&D): The creativity and curiosity of researchers drive innovation. New ideas and inventions emerge from R&D efforts, creating a stream of better methods and technologies.Convergence: The coming together of various technologies to create new ones. For example, combining medical knowledge with engineering has led to advanced medical devices.Rate of Advance: How quickly new ideas are put into practice. Faster implementation of innovations can lead to rapid technological progress.Two ways biotechnology has affected our lives include:
Advancements in medical technology have allowed infertile women to bear children, impacting population growth and family dynamics.Genetic modification of food products has improved agricultural yields and altered the environment significantly.Overall, technology has deeply impacted various aspects of modern life, from improving healthcare to changing agricultural practices.
Which term describes the form of a gene that produces a specific trait such as eye color
Allele is the term that describes the form of a gene that produces a specific trait such as eye color.
An allele is a variant form of a gene that is situated at a certain position on a specific chromosome. Alleles influence the work of gene as they determine specific traits such as eye colour and skin colour that can be passed on from parents to offspring through sexual reproduction. Diploid organisms (organisms with one set of homologous chromosome) such as humans usually possess two alleles for a trait.
Alleles are the form of a gene that produces a specific trait such as eye color.
Further Explanation:
Alleles are defined as the different type of the same gene. DNA is composed of different nucleotides and consists of genetic information in the form of genes. Alleles can influence the function of the gene as they determine particular character such as skin color and eye color that can be inherited from parents to the offspring through sexual reproduction. If two copies of the same alleles present in an organism; its genotype is called homozygous. If two copies of different alleles are found in one single organism, its genotype is heterozygous.
The Gregor Mendel developed the inheritance laws by performing research on pea plants. He gives three main laws of inheritance in the conclusion. Three laws of Mendel are:
Law of segregation Law of independent assortment Law of dominance
According to the Law of Segregation every organism consists of two alleles for each trait, and these alleles segregate by the process of meiosis. So, each gamete consists of one allele from one parent. Thus, the eye color is represented according to the allele that is present in offspring.
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Answer Details:
Grade: High School
Subject: Biology
Chapter: Mendelian Inheritance
Keywords:
George Mendel, dominant, law, homozygous, alleles, segregation, independent assortment, heterozygous, offspring, gene, plants, nucleotide, inheritance.
Briefly describe the cellular events responsible for the refractory period (hint: discuss the mechanism of repolarization).
The refractory period is responsible for preventing another action potential from being initiated. It consists of the absolute refractory period and the relative refractory period. During repolarization, voltage-gated sodium channels close and potassium channels open, allowing potassium ions to exit the cell and restore the resting state.
Explanation:The refractory period, which occurs after depolarization, is responsible for preventing another action potential from being initiated. There are two phases of the refractory period: the absolute refractory period and the relative refractory period. During the absolute refractory period, another action potential cannot start because of the inactivation gate of the voltage-gated Na+ channel.
Once the channel is back to its resting conformation, a new action potential could be started, but only by a stronger stimulus than the one that initiated the current action potential. This is due to the flow of K+ out of the cell. Any Na+ that tries to enter will not depolarize the cell, but will only keep the cell from hyperpolarizing.
The repolarization phase during the refractory period involves the closure of the voltage-gated sodium channels and the opening of potassium channels. This allows potassium ions (K+) to exit the cell, restoring the resting state with a negatively charged interior. This repolarization phase prepares the cell for the initiation of another action potential.
How much atp is produced from a single glucose molecule in each reaction set?
When molecules undergo passive transport which way do they move?
Traveling clot that suddenly blocks a blood vessel:
An embolus is a traveling clot that suddenly blocks a blood vessel in the body.
Explanation:A traveling clot that suddenly blocks a blood vessel is called an embolus.
Embolus is derived from the Greek word "embolos" which means wedge.
An embolus can be a blood clot, fat globule, air bubble, or foreign substance that travels through the bloodstream and gets lodged in a blood vessel, causing obstruction.
For example, if an embolism occurs in a blood vessel leading to the lungs, it is called a pulmonary embolism
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A grass starts with 30,000 kJ of energy. How much energy would a cheetah acquire after it ate a zebra that consumed the grass?
300 kJ because 90% is actually lost.
A 2-year-old human's brain is _____ percent of the adult brain's weight. 55 65 75 80
Final answer:
The brain of a 2-year-old is about 75 percent of the adult brain's weight, expanding to about 95 percent by the age of 6 due to myelination and synaptic pruning.
Explanation:
The brain of a 2-year-old human is approximately 75 percent of the weight of an adult brain. This rapid development in the early years is due to the processes of myelination, where the growth of the myelin sheath improves neural transmission, and synaptic pruning, which is the elimination of less active synapses to improve efficiency. By the age of 6, a child's brain is about 95 percent of its adult weight, indicating significant growth and development during the early years of life.