Final answer:
The process where a cell divides into many genetically identical cells all at once is called multiple fission, while mitosis refers to the division producing two identical daughter cells.
Explanation:
The process of a parent cell dividing into a large number of genetically identical cells all at once is known as multiple fission. While the cell division in somatic cells, where a parent cell divides to produce two genetically identical daughter cells, is called mitosis, the process of multiple fission can produce more than two daughter cells. It is a form of asexual reproduction observed among protists and other single-celled organisms. However, binary fission is another type of cell division typical in prokaryotic organisms like bacteria, where the parent cell splits into two daughter cells. Despite the difference in the number of cells produced, both binary fission and multiple fission result in offspring that are genetically identical to the parent.
Which is the biggest disadvantage of using unipotent cells for medical treatments?
A. They can make only their own type of cell.
B. They have a larger range of use.
C. They are usually not very healthy.
D. They are very susceptible to mutations.
Answer:
A. They can make only their own type of cell
Explanation:
In vertebrates with a double-loop circulation as illustrated in Figure 27–4, the loop that passes through the lungs is responsible for:
A. exchanging carbon dioxide for oxygen from the air.
B. exchanging oxygen for carbon dioxide from the air.
C. delivering oxygen-rich blood to the body.
D. delivering oxygen-poor blood to the heart.
Answer:
A. exchanging carbon dioxide for oxygen from the air.
Explanation:
In a double circulation, the blood circulates between the heart and lungs is known as a pulmonary circuit. This circuit transports deoxygenated blood to the lungs through the pulmonary artery to the lungs. Gaseous exchanges happens within the lungs. Carbon dioxide diffuses from the blood into the air within the alveoli and oxygen diffuses from the alveoli into the blood.
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Which of the following kinds of cells perform basic functions such as obtaining energy from food?
a. Plant cells, but not animal cells
b. Animal cells, but not plant cells
c. Both plant cells and animal cells
d. Neither animal cells nor plant cells
a student added an enzyme to a test tube containing a sample of DNA. after a period of time, analysis of the DNA sample indicated it was now broken into three segments. the purpose of the enzyme was most likely to
cut the dna at a specific location
A gene with the sequence ATTCATTCA underwent duplication after a few generations. Which sequence represents this gene after the mutation?
A. ATTCATTCA
B. ACTTACTTA
C. ATTCACATTCA
D. ATCCATTCA
E. ATCATTCA
Answer:
C. ATTCACATTCA
Explanation:
Duplication mutation occurs when the whole nucleotide sequence of a gene or part of it is copied. Hence, a chromosome has more than one copy of a gene or part of it.
The given gene sequence is "ATTCATTCA". In option C, the nucleotides at position 4 and 5 are duplicated. This results in the final gene sequence as "ATTCACATTCA". The duplicated segment is shown by "CACA" in the final gene sequence.
Answer:
c
Explanation:
What are 2 food making processes?
Photosynthesis and chemosynthesis are two methods by which organisms create their own food. Photosynthesis uses light energy, while chemosynthesis uses chemical energy.
Explanation:There are several food making processes, but a couple of common ones include photosynthesis and chemosynthesis. Photosynthesis is a process used by plants and other organisms to convert light energy, usually from the sun, into chemical energy that can be used to fuel the organisms' activities. For example, green plants use sunlight to turn water and carbon dioxide into glucose, which is a type of sugar that the plants use for energy.
Chemosynthesis is another food-making process, which is used by bacteria and other organisms. Rather than using light as an energy source, these organisms use chemicals from their environment to produce carbohydrates. For example, certain bacteria in deep-sea vents use sulfur compounds to perform chemosynthesis.
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A significant loss of hearing associated with senescence is referred to as _____.
Brain development of 1-3 years old baby
From ages 1 to 3, children experience significant brain development, achieving 55% of the adult brain size by age two and rapidly developing cognitive and motor skills. Infants develop basic social and communication abilities, and by the end of the year, may start walking. Toddlers further enhance communication and can form simple sentences and control attention and behavior.
Explanation:The brain development of a child between the ages of 1 and 3 is marked by rapid changes and milestones. During this period, the size of the brain increases swiftly, achieving 55% of its adult size by age 2. In these formative years, significant cognitive skills are developed. Contrary to Piaget's earlier views, recent research points out that even very young children can understand cognitive development and the properties of objects prior to direct experience with them.
Toddlers exhibit a growth in motor skills and communication abilities. By the age of 3, most children can run, climb stairs, and scribble with crayons. Language develops rapidly, with children starting to form simple sentences and becoming capable of controlling their attention and behavior, a reflection of the rapid growth in the frontal lobes associated with planning, reasoning, memory, and impulse control.
The first years of life are crucial as babies achieve important physical and cognitive milestones. For instance, they begin to smile, pay attention to others, grab toys, and start babbling. By the end of the first year, babies may even begin walking. All these developments underscore the rich cognitive and physical skills gained during the toddler stage.
"The diagram shows the inside of a eukaryotic cell.
mc003-1.jpg
Which process occurs in the structures that are labeled X?
lactic acid fermentation
alcohol fermentation
glycolysis
Krebs cycle"
The right answer is the Krebs cycle
* In prokaryotes, the Krebs cycle occurs in the cytoplasm because they do not have mitochondria.
* In eukaryotes, it occurs in the mitochondrial matrix (meaning that eukaryotes without mitochondria cannot breathe). Pyruvate (the first participant in the Krebs cycle) produced by glycolysis in the cytoplasm can, however, freely enter the mitochondria, both membranes being completely permeable to it.
label the following fatty acids as saturated or unsaturated:
Plants perform photosynthesis and respiration. Dead plants are broken down and become part of the soil. Which of the following matter do plants help to cycle through ecosystems?
What happens when electron moves down an electron transport chain?
When an electron moves down an electron transport chain, it releases energy, which is used to generate ATP and create an electrochemical gradient.
Explanation:When an electron moves down an electron transport chain, it passes through a series of protein complexes known as electron carriers. As the electron moves from one carrier to another, it releases energy. This energy is used to pump hydrogen ions across a membrane, creating an electrochemical gradient.
The movement of the electron down the electron transport chain ultimately leads to the production of ATP, the energy currency of the cell. At the end of the electron transport chain, the electron combines with oxygen to form water. In summary, when an electron moves down an electron transport chain, it releases energy, which is used to generate ATP and create an electrochemical gradient.
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Explaim how predators and prey population limit each others growth rates
9/26/18 12:30
The Predators really have the complete upper hand. The predators eat the pray: fathers, mothers, babies. This stops the family tree and lowers the population. IF the Prays population lowers then the predators populations would go down too because they depend on the pray as there food source.
The cellular process in which materials are moved across a membrane from an area of low concentration to an area of high concentration is called
What did Louis Pasteur discover? When did he discover it?
Louis Pasteur, the French chemist, discovered microbial fermentation in 1856 and was fundamental in disproving spontaneous generation. His work led to the development of the germ theory of disease and introduced techniques like pasteurization to safeguard food and beverages.
Explanation:Discoveries by Louis Pasteur
French chemist Louis Pasteur was pivotal in the discovery of microbial fermentation in 1856, which revolutionized our understanding of the processes of fermentation and food spoilage. His research indicated that microorganisms were responsible for these processes, leading to the development of pasteurization techniques designed to preserve foods such as beer, wine, and milk. Pasteur's findings were instrumental in disproving the then widely held belief in spontaneous generation, affirming instead that airborne microbes caused food spoilage. His work laid the foundation for the germ theory of disease, which held that microbes were also behind infectious diseases.
Pasteur introduced pasteurization to the French wine industry and also developed vaccines against diseases such as anthrax and rabies. These various contributions not only advanced the fields of microbiology and immunology but also brought about significant improvements in public health and hygiene, which drastically reduced deaths from infectious diseases in Europe.
How are photosynthesis and cellular respiration related?
a. Energy is continuously cycled between the two processes.
b. They each occur in completely different organisms.
c. Both depends on ATP as a source of energy.
d. Materials produced in one process are used in the other.
Which of the following events represents a disruption in access to the energy source needed by an organism?
a. A weed is uprooted from the soil.
b. Oxygen is removed from the water in a fish bowl.
c. A cactus is moved from a sunny windowsill to a dark room.
d. The water bowl is removed from a hamster's cage.
Answer:
The correct answer will be option-
1. option-D
2. Option-C
Explanation:
The process of respiration and photosynthesis are correlated as the product of one process acts as the reactant of another process.
The carbon dioxide and water produced during the cellular respiration acts as the reactant of the photosynthesis process where they help in the formation of the glucose molecule.
Thus, option-D is the correct answer.
CASE II
Cactus requires sunlight to perform photosynthesis reaction to form a food molecule called glucose. If the cactus will be moved from the sunny windowsill to dark then it will not be able to perform photosynthesis.
This represents the case of the disruption in the access to the energy source and thus Option-C is the correct answer.
foods that contain all the essential amino acids are called
Answer:
Complete proteins...
An estuary is _______.
a.
a freshwater biome
b.
an area with a low concentration of minerals and nutrients
c.
characterized by deep water
d.
an ecotone
Answer:
The correct answer is d. an ecotone
Explanation:
An ecotone is the area of transition between two different biomes so ecotone is the boundary between two different habitats. In this area, two different communities meet with each other for example estuary are water bodies that are found at the place where streams of rivers meet the sea.
Therefore at estuary two ecosystems and their community meet with each other and the transition of river in sea occurs in this area. So estuary is transition phase of fresh water biome to salt water biome therefore the right is d. an ecotone.
Final answer:
An estuary is an ecotone, a biome where fresh water from rivers mixes with salt water from the ocean, creating a unique, nutrient-rich environment that supports a variety of marine life.
Explanation:
An estuary is an ecotone, d. An estuary is a biome where a source of fresh water, commonly a river, meets the ocean, resulting in both fresh water and salt water mixing. This mixture yields diluted, brackish saltwater. Because of the continual mixing of these waters, estuaries are not characterized by deep water. Instead, they provide biologically productive and protected areas where many young offspring of various marine species, including crustaceans, mollusks, and fish, start their lives. The salinity in estuaries plays a significant role, fluctuating with the inflow of fresh water and the coming and going of tides, which influences the adaptations and types of organisms that can thrive here. Estuaries are neither solely freshwater biomes nor are they areas with low concentrations of minerals and nutrients; in fact, they are often nutrient-rich.
A red blood cell placed in pure water will
its burst you goobers
Which of the following best explains how water pollution impacts water conservation?
Polluted water is unavailable for further use.
Certain plants and microorganisms can remove pollution from water over time.
Water pollution is caused primarily by thermoelectric plants.
Water pollution affects large cities more than it affects smaller communities.
Answer: Polluted water is unavailable for further use.
Water pollution is the contamination of water bodies (including oceans, lakes, river and ponds), due to solid, liquid and gaseous forms of waste materials being added up in the water and deteriorates its quality. Water conservation refers to the strategies, policies and activities being planned and implemented by human society to prevent water from being polluted and conserve it for future use.
Water pollution has drastically impacted over the water conservation. As, due to the fact that with the increase in population cover all over the world, the activities like industrialization, water based transportation and agriculture has increased. These activities has resulted in increase in water pollution and conservation policies are not strictly followed. Hence,the water being polluted once cannot be reused further.
can the cell cycle described for mitosis be applied to meiosis as well
The cell cycle that includes interphase can be associated with both mitosis and meiosis; however, meiosis has additional steps beyond mitotic division, resulting in four haploid, genetically unique daughter cells from a single round of DNA replication.
Explanation:Can the cell cycle described for mitosis be applied to meiosis as well? The answer is both yes and no. Both mitosis and meiosis involve stages of the cell cycle including interphase, which consists of the G1, S, and G2 phases, but the processes diverge significantly after this point. The mitotic phase includes mitosis and cytokinesis, which together ensure that two genetically identical daughter cells are formed from a single parent cell.
However, meiosis includes two rounds of nuclear division, leading to four genetically distinct haploid daughter cells. While some stages like prophase and telophase share similarities across both mitosis and meiosis, anaphase I in meiosis differs substantially from anaphase in mitosis.
It is important to note that though there are similarities in the cell cycles, meiosis has additional complexity. This is because of the need to halve the chromosome number and to ensure genetic diversity among the resulting cells. The meiosis process is vital for sexual reproduction in eukaryotic organisms and is carefully regulated to produce cells with the capability to fuse with one another, leading to the development of a new organism with a unique set of genes.
Which digestive organ is the last organ food passes through before reaching your stomach?
a. pharynx
b. epiglottis
c. esophagus
d. mouth
The Esophagus is the last organ of the digestive system through which food passes through reaching your stomach. Thus, the correct option for this question is C.
What is the Digestive system?The digestive system may be defined as a type of organ system that contains organs that are responsible for the breakdown of complex food substances into simpler ones that are efficiently utilized by the body in order to derive energy for metabolic purposes.
According to the context of this question, the esophagus is a long and thin tube that passes through the neck, thorax, and diaphragm and directs to a J-shaped muscular organ known as the stomach. A muscular sphincter also known as gastro-oesophageal controls the opening of the esophagus into the stomach.
Therefore, the Esophagus is the last organ of the digestive system through which food passes reaching your stomach. Thus, the correct option for this question is C.
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Crossing over percentages are converted to map units that indicate the physical distance between two genes on a chromosome.
True
False
. John is jogging on a winter day. The outdoors temperature is 31 degrees F. Yet, his body temperature is 98 degrees F. What term best describes the process causing this difference in temperature? a) homeostasis b) pathophysiology c) fever d) hyperthyroidism
In living cells, chemical processes, such as synthesis, all require the action of 1. specialized antibiotics 2. hormones 3. salts 4. biological catalysts
The correct answer is:
BIOLOGICAL CATALYSTS.
In living cells chemical processes such as synthesis all require the action of biological catalysts. Biological catalysts are enzymes that speed up the chemical processes in the body.
Explanation:
Enzymes are water-soluble protein molecules that can promote up chemical reactions in cells. These reactions constitute respiration, photosynthesis and manufacturing new proteins. For this purpose, enzymes are seldom called biological catalysts. In fact, the human body would not survive outwardly enzymes because the chemical reactions needed to sustain the body simply would not occur fast enough.
Biological catalysts, known as enzymes, are required in living cells for chemical processes such as synthesis.
Explanation:In living cells, biological catalysts are required for chemical processes such as synthesis. These biological catalysts are known as enzymes, which speed up the rate of chemical reactions by lowering the activation energy. Enzymes are essential for many important biological processes, such as digestion, metabolism, and DNA replication.
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Where is groundwater found?
A. In the zone of saturation
B. In a zone of impermeable rock
C. On Earth's surface
D. On the water table
Answer:
The answer is A. In the zone of saturation
Explanation:
Which best describes a rhinovirus?
A. A tube the comes off a virus
B. A virus that causes a common cold
C. A protective shell around a virus
D. A piece of DNA transferred by a virus
The right option is; B.
A virus that causes a common cold best describes a rhinovirus.
A rhinovirus is any of many common infectious viruses in humans and the primary cause of the common cold. Rhinoviruses can be transmitted directly from person to person through contaminated objects or through aerosols of respiratory droplets. Other diseases such as ear infections, sore throats and infections of the sinuses may also be caused by rhinoviruses.
Which of the following is a use for a weather radar a. forecasting weather b. preventing precipitation c. measuring rainfall d. measuring temperature
Correct answer: A). Forecasting weather
A weather radar is an instrument that is used to locate precipitation, calculate its motion and determine the type i.e hail, snow or rain. It sends electromagnetic energy pulse into the atmosphere. If that pulse of energy interacts with something, then it reflects back the energy, which can be sensed by the weather radar.
Nowadays, most radar used are Doppler effect, which has dual polarization, it determines that movement is toward or away from the radar.
Hence, the correct answer would be option A.
Answer:
Answer A
Explanation:
If a nonsense mutation occurs in a person’s skin cells, the mutation cannot be inherited by offspring. True or False?
Compare and contrast cilia, flagella and pseudopodia
Cilia and flagella are microtubule-based structures aiding in cell motility in eukaryotes, with cilia being shorter and more numerous, while flagella are longer. Pseudopodia are cytoplasmic extensions used by some protists for movement and feeding. The cellular components differ among prokaryotic, animal, and plant cells, with variations in organelles and boundaries.
Explanation:Comparison of Cilia, Flagella, and PseudopodiaCilia and flagella are both hair-like structures that extend from the plasma membrane of eukaryotic cells and are composed of a 9+2 array of microtubules. However, cilia are shorter, often cover the entire surface of a cell, and can be used for locomotion, feeding, or movement of extracellular particles. Flagella are longer and fewer in number, serving primarily for the locomotion of cells, such as sperm and some protozoa. Prokaryotic flagella are structurally different from eukaryotic flagella but also enable locomotion. Pseudopodia, on the other hand, are extensions of the cell membrane and cytoplasm used by some protists to move and feed by attaching to a surface and flowing the cytoplasm into the extension.
When contrasting prokaryotic cells, animal cells, and plant cells, prokaryotic cells lack a nucleus and membrane-bound organelles, while animal and plant cells feature a nucleus and a complex set of organelles. Animal cells do not have a cell wall or chloroplasts, which are present in plant cells; plant cells also have large central vacuoles. The boundaries that cells use to separate themselves from their surrounding environment also differ, with bacteria utilizing a cell wall and plasma membrane, animal cells having a flexible plasma membrane, and plant cells featuring a rigid cell wall in addition to their plasma membrane.
Among the cellular cytoskeletal elements, microfilaments are involved in phagocytosis, allowing macrophages to engulf pathogens. Microtubules, found in cilia and flagella, facilitate the movement of these structures and also play a role in cell division and maintaining cell shape.