A severe vitamin b12 deficiency results in what form of anemia
They all must convert their rna genome into dna
b. the genome of a single-stranded (+) rna virus can serve directly as an mrna.
c. a single-stranded (-) rna virus cannot produce viral proteins.
d. all are true
??? where id a? not enough answers
An aquatic food web consists of phytoplankton → krill → seals → sharks. The removal of which component is MOST LIKELY to cause an immediate impact on the food web?
a.phytoplanktonB)krillC)sealsD)sharks
Answer:
A) Phytoplankton
Explanation:
All organisms need energy which they derive by naturally feeding on one another in a series of chain called FOOD CHAIN. The food chain can form a more complex interrelated series called FOOD WEB. All food chains and webs starts with a set of unique organisms called PRODUCERS.
Producers are autotophs that produce their own food via the process of photosynthesis. They are the only set of organisms that have the ability to tap the energy from the sun, which then flows in the food chain as organisms feed on one another.
Phytoplanktons are aquatic producers, hence, they photosynthesize in water. The food chain will be immediately affected if the phytoplanktons (producers) are removed from the food web because there will be no organism to start the energy flow.
When one form of energy is converted into another form of energy; such as the conversion from a sensory stimulus energy to action potential. this is known as _______?
Why does a human red blood cell lyse when placed in a hypotonic solution while a plant cell does not?
Cells will usually divide if they receive the proper signal at a checkpoint in the __________ phase of the cell cycle. a schematic model for the cell cycle control system. consider the cell cycle shown below. cells will usually divide if they receive the proper signal at a checkpoint in the __________ phase of the cell cycle. a schematic model for the cell cycle control system. g2 g1 m s
Embryonic stem cells have show promise when used to treat certain diseases.Despite this,there are many people opposed to stem cell research based on ethical grounds
Embryonic stem cell research requires the use of human embryos.
Name the only eukaryote lineage that has some species that have undergone tertiary endosymbiosis.
Which is found only in plants of the phylum Anthophyta? asap!!
a-xylem
b-cones
c-flowers
d-pollen
Answer:
The correct answer would be c- flowers.
The phylum Anthophyta is the phylum of flowering plants or angiosperms.
It is the youngest phylum and its members are the most abundant on the earth.
The characteristics of the angiosperms may include:
Flowers are the mean of reproduction in these plants.
Double fertilization
Ovules with two integuments et cetera.
Answer:
The answer is C
Explanation:
What is the average lifespan of an individual with dmd? what are some of the more common causes of death in individuals with this disease?
What happens when organic molecules decompose?
Energy is absorbed from the environment.
Energy is released.
The products quickly form new ionic bonds.
Answer: Energy is released
Explanation:
Organic molecules has the ability to decompose and release energy in the ecosystem. Energy can neither be created nor be destroyed, it can only be converted from one form to another form.
The organic molecules have energy stored in them, this energy is released when the organic matter is decomposed, it gets into the form of nutrients in soil.
This nutrient is used by plants and this is how the organic molecules transform energy from one form to another.
What two vitamins significantly influence red blood cell production and are essential for dna synthesis?
The two key vitamins for red blood cell production and DNA synthesis are Vitamin B12 and folate (Vitamin B9). Vitamin B12 is necessary for proper erythrocyte development and DNA synthesis, while folate is essential for RNA and DNA synthesis, especially in rapidly dividing cells.
The two vitamins significantly influencing red blood cell production and essential for DNA synthesis are Vitamin B12 (cobalamin) and folate (Vitamin B9).
Vitamin B12 is crucial for the normal maturation and development of erythrocytes, which are red blood cells. It plays a key role in DNA synthesis, and without it, the cells can suffer from pernicious anemia. It's found in animal products such as liver, eggs, and milk. A unique aspect of Vitamin B12 is that it requires an intrinsic factor for absorption, and deficiency may occur due to a lack of this factor or a diet lacking B12, like a vegan diet.
On the other hand, folate (Vitamin B9) is also a required coenzyme for the synthesis of DNA and RNA, and therefore is vital for the production of new cells, especially rapidly dividing ones such as red blood cells. A folate deficiency can lead to macrocytic anemia, where red blood cells grow large but do not divide, leading to inefficient oxygen transportation.
Both of these vitamins are paramount in maintaining healthy blood cell counts and ensuring proper function of the body's genetic material. Supplements or dietary intake of these vitamins can help prevent deficiencies and related health issues.
True or false: during stressful events, there is decreased blood supply to the skin, which results in "goose bumps."
How many cells does the most common organisms on earth have
Bacteria, which are unicellular organisms, are the most numerous organisms on Earth. Found everywhere, from soil to the human body, they play essential roles in ecosystems and human health. Their global number is estimated to be around 4-6 x 10³⁰ cells.
The most numerous organisms on Earth are bacteria. These simple, yet incredibly adaptable and diverse life forms have just one cell. Bacteria can be found in various environments, such as in soil, where a single gram can harbor about 40 million bacterial cells. The human body is also teeming with bacterial cells, hosting roughly 10 times more bacterial cells than human cells. While individual bacteria are unicellular, they have an immense impact on their environments and on the planet as a whole.
Prokaryotes, which include bacteria and archaea, are estimated to number 4-6 x 10³⁰ cells globally, showcasing their sheer abundance. Bacteria have a crucial role in ecosystems and are essential for human survival, participating in processes such as digestion and the cycling of nutrients. Despite their minute size, bacteria's global biomass exceeds that of all plants and animals, making them the most common organisms on Earth.
Scientists plan to re-create the origin of life on earth in the laboratory. Which of these statements best summarizes their experimental design?
The statement that best summarizes the experimental design of scientists planning to re-create the origin of life on Earth in the laboratory is: d. Living matter would be created from reproducing molecules.
Which of these statements best summarizes their experimental design?
This idea says that life started from things that were not alive on Earth. In the lab, scientists try to recreate what the Earth was like a long time ago. They want to see how basic molecules might have started life.
By doing tests and computer simulations, they want to figure out how chemicals and physical reactions might cause molecules to start reproducing and possibly create life.
Scientists plan to re-create the origin of life on Earth in the laboratory. Which of these statements best summarizes their experimental design? Select one:
a. Plants would be created from rocks.
b. Organisms would be created from fossils.
c. Bacteria would be created from genetic code.
d. Living matter would be created from reproducing molecules.
An isotope has an atomic number of 8 and an atomic mass number of 18. How many neutrons does it have?
In this exercise we have to use the knowledge of isotopes to determine how many neutrals it has, as well as:
This isotope have 10 neutrons.
What is an isotope?These are atoms of the same chemical element that have the same number of protons (same atomic number), but differ by mass number (A = protons + neutrons). Their mass number is different because the number of neutrons in the nucleus is different.
Then we can write as:
Mass number - Atomic number = Number of neutrons
Putting the given values in the statement we have:
[tex]18-8=10[/tex]
See more about isotope at brainly.com/question/13214440
The term tachycardia refers to heart rate rhythms that are approximately how many beats per minute
Proper digestion requires the coordinated effort of many hormones with various effects. how do gastrin, cholecystokinin (cck), and secretin influence digestion
Gastrin stimulates the release of gastric acid in the stomach. Secretin and CCK, released from the small intestine, stimulate the pancreas to secrete bicarbonate and digestive enzymes, respectively, contributing to the neutralization of stomach acid and digestion of fats. These hormones are essential for proper digestion.
Proper digestion involves the coordination of many hormones with different effects on the digestive system. Three key hormones involved in this process are gastrin, cholecystokinin (CCK), and secretin.
Gastrin is the main digestive hormone of the stomach, secreted in response to the presence of food. It stimulates the secretion of gastric acid from the parietal cells of the stomach mucosa. This acid helps to break down food for further digestion.
When chyme enters the duodenum, it triggers the release of secretin and CCK from the small intestine. Secretin is released in response to acid and stimulates the pancreas to secrete bicarbonate, which neutralizes stomach acid in the small intestine. CCK, which is secreted in response to fats, stimulates the pancreas to release digestive enzymes and the gallbladder to release bile, contributing to the digestion and absorption of fats.
Together, secretin and CCK help to coordinate the secretion of pancreatic juice, a mixture of bicarbonate and digestive enzymes that travel to the small intestine to continue the digestive process. These hormones are critical components in the proper progression of digestion.
What is a type of fibrous protein that makes up the majority of the cortex of a hair?
The most obvious function of the legislature is to
The most obvious function of the legislature is to make laws, shaping and regulating society through legal frameworks.
The most obvious function of the legislature is to make laws. This is a primary responsibility of legislative bodies in democratic systems. The legislature, often composed of elected representatives, is tasked with drafting, debating, and passing legislation that governs the behavior of individuals and organizations within a society.
In addition to law-making, legislatures typically have other functions, including:
1. Representation: Legislatures provide a forum for representatives to express the diverse interests and concerns of their constituents. This ensures that a wide range of views and perspectives are considered in the decision-making process.
2. Oversight: Legislatures oversee the executive branch of government to ensure that laws are implemented effectively and that the government is operating in the public interest. This may involve holding hearings, conducting investigations, and requiring reports from government agencies.
3. Budgeting: The legislature is responsible for approving the government's budget, which involves deciding how public funds are raised and spent. This process allows the legislature to influence economic policy and prioritize spending on various public services and programs.
4. Amending the Constitution: In some countries, the legislature plays a role in amending the constitution, which is the highest law of the land. This process typically requires a special majority and may involve additional steps such as ratification by the states or a referendum.
5. Confirmation of Appointments: Legislatures often have the power to confirm or reject key appointments made by the executive, such as cabinet members, judges, and other high-ranking officials.
6. Impeachment: In some systems, the legislature has the power to impeach or otherwise remove officials, including the head of state or government, for misconduct or crimes committed while in office.
While these functions are critical to the operation of a democratic government, the primary and most obvious role of the legislature is to legislate, that is, to create, amend, and repeal laws.
Enzymes are biological ____________ that speed up chemical reactions and decrease the activation energy while releasing energy.
Lc is a 55 year-old hispanic female with renal insufficiency who has been hospitalized for acute decompensated heart failure. she was started on nitroprusside and is now experiencing nausea, confusion, rapid breathing, and tachycardia. the physician suspects cyanide toxicity. what antidote could the pharmacist recommend
A student compared some soccer players to the atoms in the liquid state. Which of the following activities were the soccer players most likely performing?
Answer: i have this test right now but i think its huddling around the ball
Explanation:
The water cycle A. describes the continuous movement of water on, above, and below the surface of the Earth. B. has three basic processes. C. is unique to the planets Earth and Neptune. D. is not an independent process; it plays a role in recycling nutrients in the carbon and nitrogen cycles.
The planet Earth is the only known planet to have water in three forms - liquid, solid and gas.
The water cycle is continuous and refers to water changing forms and moving from one stage of the cycle to the next. Such water movement occurs all over the planet - on, above, and below the surface of the Earth.
Both sneezing and coughing are examples of protective reflexes triggered by irritation. sneezing and coughing both involve a disruption in respiration. what is the formal name for the period when respiration is suspended
A child burns several fingers during a classroom cooking activity. your immediate action should be to
Which word best describes the structure of the cell membrane? alayered brigid cimpermeable dnonpolar?
Biochemistry is the study of _____.
energy and matter within living organisms
energy and matter of earth
energy and chemicals
chemical reactions and bonds
Answer: The correct answer for the fill in the blank is energy and matter within living organisms.
Biochemistry is the branch of science, which deals with the study of chemicals and various chemical processes occurring inside the living organisms.
Energy and matter is present in the living forms. For instance, food is broken down and energy is produced in this metabolic reaction. The energy is utilized by the living organism in performing various activities. As this metabolic reaction occurs inside the body of an organism. Thus, it is the part of biochemistry.
Thus, biochemistry is the study of energy and matter within living organisms.
Red blood cells maintain their shape in what solution
Why don't red blood cells pop in the bloodstream?