Cell Biology: Parts of the cell. Organelles.
The endoplasmic reticulum is an organelle found just outside the nucleus that is made of several interconnected cisternae, which membranes are continuous with the outer nuclear membrane.
It has two sections: the rough endoplasmic reticulum, which has ribosomes on its surface, and the smooth endoplasmic reticulum.
Basically, the endoplasmic reticulum synthetizes proteins and membrane lipids, and then sends them to the place that needs them.
In turn, the Golgi body or Golgi complex is a different organelle that is also made of cisternae, and where the proteins sent from the endoplasmatic reticulum are processed and modified before reaching their final destination.
This means the correct answer would be B. The Golgi apparatus receives proteins from the endoplasmic reticulum that it can modify or store for later use.
6)
All plant and animal groups existing together and the physical factors with which they inte
A)
climate.
B)
kingdom.
ecosystem.
D)
weather pattern.
Answer:
ecosystem
Explanation:
because climate involves weather
Kingdom wouldn't make any sense
ecosystem is a group of co-existing living things
and weather patter is involving weather
tubular organ that is transected during a vasectomy.
During a vasectomy, the tubular organ that is transected is called the vas deferens.
A vasectomy is a surgical procedure that involves cutting or blocking the vas deferens, a tubular organ that carries sperm from the testicles to the urethra. A small incision is made in the scrotum, and the vas deferens is transected, preventing the sperm from being ejaculated during sexual intercourse. By cutting or blocking the vas deferens, sperm can no longer reach the urethra, and therefore cannot be ejaculated during sexual intercourse. This prevents fertilization of the female egg and provides a highly effective form of birth control. Although the procedure is considered permanent, it is possible to reverse a vasectomy through a surgical procedure called a vasectomy reversal. However, the success of this procedure varies and is generally lower if the vasectomy was performed a long time ago.
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When glucose is used for growth, it is converted into:
Answer:
The sugar produced by photosynthesis can be converted into the sugar glucose. Thousands of glucose molecules can be linked together to form the complex carbohydrate cellulose. Cellulose is a very tough molecule that is used to build the cell wall of plant cells.
Explanation:
What defines someone as a female?
A. The extra X chromosome in the DNA
B. The extra Y chromosome in the DNA
C. A person's opinion
D. The definition of a female varies depending on each person
Answer:
male produce xx and xy chromose
so, xx for male and xy for female
the correct option is ( b )
what type(s) of prokaryotic regulation fits the description? transcription occurs with high levels of the small molecule.
Positive inducible and negative repressible type(s) of prokaryotic regulation fits the description.
What regulates prokaryotic transcription?In prokaryotes, this means that the controls on transcription are straightforward activators and repressors. A quick and effective control mechanism is required. In order to alter from a default state of expression or non-expression, only one of the two regulatory mechanisms may be employed for particular genes.
Gene regulation comes in two flavors: positive and negative. Positive regulation is initiated by activators (and occasionally inducers), whereas negative regulation is initiated by repressors. An operon is bound by an activator or inducer, which either speeds up transcription or permits it to continue.
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Where would amino acid residues with nonpolar r-groups be found within the overall structure of a folded globular protein such as chymotrypsin?.
The amino acid residues with nonpolar r-groups of a folded globular protein such as chymotrypsin would be found in the interior of the protein.
What are nonpolar R-groups?In a protein, the nonpolar R-groups are specific lateral groups that exhibit hydrophobic features, thereby they are located in the interior of the macromolecule in an aqueous solution.
In conclusion, the amino acid residues with nonpolar r-groups of a folded globular protein such as chymotrypsin would be found in the interior of the protein.
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Why is evolution considered a scientific theory?
A. Because it is a hypothesis.
B. Because it is a guess made by scientists.
C. Because it was thought of by scientists.
D. Because it is supported by scientific data.
Evolution considered a scientific theory because it is supported by scientific data. Thus option D is correct.
What is evolution ?
A change in the characteristics of a species over several generations due to various cause such as natural selection.
Evolution has different components such as Natural Selection, Macro-evolution, and Micro-evolution.
Natural selection is the method that drives evolution of a species. The organism can undergo adaption in a given habitat to increase the survival rate more than others.
Several factor can influence evolution such as gene flow refers to change in allele frequency in a population due to immigration and emigration.
secondly genetic drift refers to an existing population produces a new and smaller population with less variation in a random manner.
Mutation also add a favorable allele leads to increase in frequency in a population.
Sexual selection refers to selection of successful trait for mating which increase the frequency.
Thus option D is correct.
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Answer: this it fasho
Explanation:
what are 2 reasons of why birds die out on the Easter island?
Answer:
How did the extinction of the birds affect Easter Island?
Consequently, the consumption of land birds, migratory birds, and mollusks increased. Soon land birds went extinct and migratory bird numbers were severely reduced, thus spelling an end for Easter Island's forests.
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~Jack!~
Answer:
They die because there’s lose of forest there animal populations is decreased and there’s lose of seeds for them to eat.
Explanation:
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Addison
Suppose your town wants to use this wood as an added filtration system for the town's drinking water. Use the
information in the article to argue whether you are for or against this solution.
Can you help me solve my question.
Answer:
It’s not a wise idea to use this method until scientists conduct more research and tests. The wood does show that it can filter out bacteria in a laboratory. However, the scientist also stated that it is not yet ready for commercial use. This method hasn’t been tested on a large scale. Also, the wood can fracture, allowing bacteria to pass through and contaminate the water.
Explanation:
Edmentum
How do fossils of limb structures provide evidence that ancient and modern tetrapods are related
Answer: Fossils of limb structures provide evidence that ancient and modern tetrapods are related because it backs up the fact that both ancient and modern tetrapods follow the one bone two bone many bone digit pattern. It suggests to how modern and ancient tetrapods have the ancestry which come from early tetrapods.
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What are safety models and what are their purpose of different component of models how do we understand accident theory using models ? Compare and write down different types of models functions and their relationship?
Safety models are used in industries to help identify, analyze and predict possible hazards that might be encountered while working. They are used to manage risks, improve safety, and enhance the quality of life by ensuring that safety measures are in place to prevent accidents.
The purpose of safety models is to provide a systematic framework for identifying and controlling hazards in order to prevent accidents. The models are typically used to identify hazards, assess their risks, and develop control measures to minimize the risk of accidents. Safety models can be used for various purposes, such as evaluating the safety of a new design, identifying potential hazards in an existing system, or analyzing an accident or incident to determine the cause and prevent recurrence
Hazard identification - This involves identifying potential hazards associated with a particular activity or process.2. Risk analysis - This involves assessing the likelihood and consequences of the hazards identified.3. Risk evaluation - This involves evaluating the risks associated with the hazards identified and determining the best course of action to minimize those risks.4. Risk control - This involves developing and implementing control measures to minimize the likelihood and severity of accidents safety management - This involves managing the safety of a system or process to ensure that it operates safely and effectively.
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Parents that are heterozygous for having freckles (dominant) are crossed. Which correctly describes their offspring?
Twenty-five percent have freckles.
Twenty-five percent are Ff.
Seventy-five percent have freckles.
Seventy-five percent are Ff.
Explain the role of gelada baboons, walia ibex, and Ethiopian wolves in the Ethiopian Highland ecosystem.
The role of ice baboons and walia ibex is primary consumer, and ethiopian wolves are secondary consumers in the Ethiopian Highland ecosystem, to understand more about this ecosystem of this beautiful country and its nature.....
Ethiopian Highland ecosystemSituated a few kilometers northeast of the city of Gondar, the park covers 179 square kilometers of mountainous area, with an average elevation of 3,300 meters. Mount Ras Dashan, which is the fourth highest on the mainland and the highest in Ethiopia at 4,550 meters, is located adjacent to the park, they are mountains with grassy fields and forests, although many of these have disappeared.
AnimalsThe Ethiopian wolf is the rarest canid in the world, and Africa’s most threatened carnivore. The gelada is an Old World monkey, not a baboon despite previous naming conventions, the gelada feeds predominantly on fresh shoots of grass, and to a lesser extent on grassroots and seeds.
The walia ibex is found nowhere else in the world except in the Simien Mountains National Park. Walia ibex live on the steep slopes and escarpments of the Simien Mountains, Walias live in groups and forage in open areas. Males and females usually graze separately unless they mate.
With this information, we can say that iced baboons and walia ibex are primary consumer animals, as they feed on producers, and Ethiopian wolves are secondary consumers because they feed on primary consumers.
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Is the yellow spotted lizard poisonous?
Answer:
Yes, it is poisonous.
Explanation:
It contains venom which is poisonous.
The yellow spotted lizard is poisonous and can be extremely dangerous if it bites you, despite the fact that it is rather unusual to find one in the wild.
What is yellow spotted lizard?Being handled by a yellow-spotted lizard could result in a bite. The lizards' little, sharp teeth may cause a few drops of blood to be drawn, but due of their size, the bites are unlikely to be serious.The symptoms of being bitten would be unpleasant and gradual. Death could result if immediate medical care (from a doctor) is not provided. The sole treatment for the venom of yellow-spotted lizards is onion juice; it is believed that they are allergic to it.For more information on yellow spotted lizard kindly visit to
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The process by which the order of bases in messenger RNA (mRNA codes for the order of amino acids in a protein is called a. nondisjunction b. replication c. translation d. Transcription
Answer:
The correct answer should be translation.
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What do you predict would happen to the frequency of the genes that causes more of the molocules to be made in a population over time
I uploaded the answer to a file hosting. Here's link:
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Give reason why water in the xylem and translocation of food is related with each other.
Answer:
Transportation of food and water takes place through xylem and phloem in the plants. The water from the roots is transported through xylem. Phloem on other hand transports the food prepared in the leaves to other parts of the plants.
Which event stimulated the rapid development of eukaryotes?
A) extinction of some organisms
B) addition of oxygen to the atmosphere
C) origin of multicellular organisms
D) colonization of land
The addition of oxygen to the Earth's atmosphere, often referred to as the Great Oxygenation Event or Oxygen Catastrophe, played a crucial role in the evolution and development of eukaryotes. Hence option B is correct.
Prior to this event, Earth's early atmosphere had very low oxygen levels. The rise of oxygen was primarily a result of oxygen-producing photosynthetic bacteria, such as cyanobacteria, which emerged and thrived in ancient oceans.
Through the process of photosynthesis, these organisms released oxygen as a byproduct, gradually increasing its concentration in the atmosphere over millions of years.
The availability of oxygen in the atmosphere created new ecological niches and selective pressures, leading to the development of more complex and energy-efficient cellular structures, such as mitochondria, which are essential components of eukaryotic cells.
The ability to generate energy more efficiently through aerobic respiration conferred a significant advantage to early eukaryotes, allowing them to thrive and diversify.
Therefore, option B, the addition of oxygen to the atmosphere is correct.
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Place the tiles in order so that they describe a population undergoing natural selection
Not all tiles will be used
Answer:
A new species of hawk that preys on rabbits is introduced to the habitatThe hawks have more success in catching rabbits with white fur because they are easier to see in the habitatThe rabbits´ white fur mutate so their fur is tan or brownThe next generation of rabbits has a higher proportion of individuals with tan and brown fur.Explanation:
Natural selection is an evolutive force that can act favoring an allele or against it, according to how it affects the fitness of individuals. Natural selection selects beneficial alleles and increases their frequency in the population.
When many organisms in a population sharing the same trait die, it is because they did not have good fitness, so they were not adapted to the environment and its pressures. The alleles coding for that trait were not good for the fitness of the animals, so they do not get to survive.
These individuals die before reproducing, so they could not transfer their genetic charge to the following generation. Eventually, the alleles coding for the trait will decrease in the population, probably near zero. Natural selection is acting against this phenotype. Other alleles will be beneficiated, and their frequency in the population will increase.
This change in alleles frequency is what we call adaptation.
Natural selection results in adaptation, which means the increase of the aptitude phenotype. Aptitude is the contribution of each genotype to the next generation.
In many cases, adaptations can be correlated to environmental factors or selective pressures applied by other organisms or habitats.
Let us remember that a mutation is a change or alteration in DNI sequences that introduce new variants. Many of these are eliminated, but some of them might succeed and be incorporated into each individual. These mutations are the ones that have been selected by natural selection.
So, in the exposed example, we are focussing on rabbits populations.
• The selective pressure or modeling environmental factor is predation by the introduced hawk.
• The rabbits´ response to predation is the survival of only those that carry mutations ⇒ tan or brown fur
• Natural selection benefits these mutations.
• Tan or brown rabbits survive and increase their fitness.
Whale primary functions
The primary functions of whales include feeding, reproduction, communication, and migration.
Whales are primarily filter feeders or predators, depending on the species.
Filter-feeding whales, such as baleen whales, have baleen plates in their mouths that allow them to filter out small prey, such as krill or small fish, from large volumes of water.
Predatory whales, such as toothed whales, hunt and feed on various marine organisms, including fish, squid, and marine mammals.
Reproduction is another important function for whales. Most whale species have a gestation period of several months, with females giving birth to a single calf.
The calves are nursed with milk from their mothers and rely on their care for a period of time until they become independent.
Communication is vital for whales, as they rely on vocalizations to communicate with other members of their pod.
Whales produce a variety of sounds, including songs, clicks, and whistles, which serve purposes such as mating, social interactions, and navigation.
Migration is a common behavior observed in many whale species. Whales undertake long-distance migrations, often covering thousands of kilometers, to reach feeding grounds in nutrient-rich waters or to reproduce in specific breeding areas.
These migrations are driven by seasonal changes in food availability and environmental conditions.
In summary, the primary functions of whales encompass feeding, reproduction, communication, and migration, all of which are essential for their survival and successful adaptation to their marine environments.
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What is the dependent variable
Answer:
B) Tempurature of the blocks
Explanation:
A dependent variable is defined as the variable that is used to measure in an experiment.
Why are barriers sometimes placed on trade?
Answer:
Both tariffs and subsidies raise the price of foreign goods relative to domestic goods, which reduces imports. Barriers to trade are often called “protection” because their stated purpose is to shield or advance particular industries or segments of an economy.
Explanation:
Which of the following is not an action of estrogen to maintain pregnancy? View Available Hint(s) growth of glandular tissue in the breasts growth of uterine smooth muscle prolactin secretion growth of duct tissue in the breasts
The option that is not an act of estrogen to maintain pregnancy among the given choices is "prolactin secretion." Estrogen plays a vital role in pregnancy by supporting the growth of glandular tissue in the breasts, the growth of uterine smooth muscle, and the growth of duct tissue in the breasts.
Out of the given options, prolactin secretion is not an action of estrogen to maintain pregnancy. Estrogen is a hormone that plays a vital role in female reproductive health. During pregnancy, it helps to regulate and support the growth of various tissues in the breasts and uterus. Estrogen stimulates the growth of glandular tissue and duct tissue in the breasts, which prepares the mammary glands for milk production. It also promotes the growth of uterine smooth muscles, which helps to maintain the pregnancy and supports fetal development.
However, prolactin secretion is not directly regulated by estrogen. Prolactin is a hormone that is primarily secreted by the pituitary gland and plays a crucial role in lactation and milk production after childbirth. Although estrogen can indirectly influence prolactin levels through its effects on other hormones like oxytocin and progesterone, it is not an action of estrogen to maintain pregnancy.
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how would you (in your own words) define carbon footprint in 2 sentances?
Explanation:
the amount of carbon dioxide released into the atmosphere as a result of the activities of a particular individual, organization, or community.
Answer:
1: carbon footprint is the amount of carbon dioxide released into the atmosphere as a result of the activities of a particular individual, organization, or community.
2: A carbon footprint is a measure of the impact your activities have on the amount of carbon dioxide (CO2) produced through the burning of fossil fuels and is expressed as a weight of CO2 emissions produced in tonnes.
Consider a population of lizards where there is variation in jaw size. Which types of selection could produce an increased proportion of lizards with large jaws? Check all that apply.
A. disruptive selection
B. directional selection
C. stabilizing selection
The types of selection that could produce an increased proportion of lizards with large jaws are A. disruptive selection and B. directional selection.
Disruptive selection occurs when extreme phenotypes are favoured over the average phenotype. In the case of the lizards, if large-jawed lizards are better able to survive and reproduce than those with average or small jaws, disruptive selection will lead to an increased proportion of large-jawed lizards in the population.
Directional selection occurs when one extreme phenotype is favoured over the other extreme and the average phenotype. In the case of the lizards, if large-jawed lizards are better able to survive and reproduce than those with average or small jaws, directional selection will lead to an increased proportion of large-jawed lizards in the population.
Stabilizing selection, on the other hand, favours the average phenotype and selects against the extremes. Therefore, it would not lead to an increased proportion of large-jawed lizards in the population.
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All living things must have a method of replication
True or false!?
Answer: True
Explanation:
True or False: Very few fossils preserve soft parts like hair and skin.
A. True
B. False
Answer:
true
Explanation:
Very few fossils preserve soft parts; some insects are preserved in amber and animals may be preserved in ice. Some fossils are created when minerals replace the organic material.
Name the particular
characteristics of the
individual with this
syndrome
Answer:
what syndrome
Explanation:
________ is a polysaccharide found in animal cells, whereas ________ is a polysaccharide found in plants that can be degraded by humans.
Glycogen is found in animal cells and starch is found in plant cells.
Glycogen is a polysaccharide of glucose. It is used to store energy in animal cells. The linear chains in a glycogen molecule are linked by α(1,4) glycosidic bonds while the branched chains are linked by α(1,6) glycosidic bonds. Glycogen breaks into glucose to provide energy to the body when needed.
Starch is the polysaccharide of plants and is made up of glucose units. They are joined by glycosidic bonds. It is found in most plant-based foods and is a common carbohydrate in the human diet. It has two types of molecules helical amylose and branched amylopectin. Amylose forms 20-25% of starch whereas amylopectin forms 75-80% of it.
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how does the exposed tissue of cortex becomes protected when primary epidermis fall off in the stem?
Answer:
during secondary growth the primary epidermis spilt, dries, fall off. to protect the exposed tissues and to increase in diameter cork cambium aries in the cortex.