Bacteria communicate and exchange genetic information through extensions of their cell walls called A) cilia. B) desmotids. Eliminate C) flagella. D) pili.
Answer: D - pili
bacteria communicate and exchange genetic information through extensions of their cell walls called 'pili'.
Explanation:
Pili are found in bacteria and archaea surfaces as thin, rigid, hair-like fiber made of protein. They aid attachment of various bacteria cells to surfaces and other cells.
Pili are antigenic. They act as binding site for other cells like viruses and bacteria cells.
When pilus of a bacterium binds another bacterium cell (recipient cell), the single strand DNA is transferred to the recipient cell. Among the types of pili, the conjugative pili are known for communication and exchange of genetic informations between bacteria cells. The conjugative pili are also known as 'sex pili'. Exchange of DNA occurs after attachment of the donor to the recipient. The donors (bacteria cells with conjugative pili) attach to the recipients (bacteria without conjugative pili), connecting cytoplasm of both cells and promoting exchange of genetic materials including transfer of pili to the recipient cell.
What problem does the chromosome number of various organisms present to evolutionists?
The body naturally experiences an increased metabolic rate the body naturally experiences an increased metabolic rate when we adopt a reduced-calorie diet. during pregnancy. as we age. during sleep.
Metabolic rate increases during pregnancy. Some women experience the first signs of pregnancy as early as two weeks after conception, while others begin to experience symptoms closer to four or five weeks later. Some women won't experience any signs of pregnancy until their period is significantly later or even later.
Within the first 15 weeks of pregnancy, metabolic rates significantly rise, peaking in the third trimester during the greatest growth phase. This expanded metabolic rate might put pregnant ladies at a higher gamble of hypoglycemia, or low glucose.
Learn more about metabolic rates, here:
https://brainly.com/question/32284485
#SPJ6
The boundary where fresh water feeds into salt water is called a(n) _____.
Estuary is a partly enclosed coastal body of water by which river water is mixed with seawater. In a broad sense, the estuarine setting is defined by salinity boundaries instead of geographic boundaries. The word estuary is derived from the Latin words aestus (“the tide”) and aestuo (“boil”), signifying the effect produced when tidal flow and river flow meet.
What is the definition of background information in Bio????
Which tree harvesting method promotes the growth of younger trees by selectively cutting mature trees over a period of 10 years?
Answer:
Shelterwood cutting.
Explanation:
Shelterwood cutting is a technique employed in silvicultural processes that promotes the growth of younger trees by selectively cutting mature trees over a 10-year period.
In this technique is made the progression of cuttings that promotes the growth of seedlings resulting in the harvesting of mature trees and promotion of the growth of younger trees. Generally this technique is used in old forests where mature plants are causing shade of young plants. Generally young plants are long-lived and upon receiving light, after thinning the old plants, begin to develop properly and promises a longer duration of the forest.
Match the fiber with the origin(s) and destination(s) of the impulses it carries: visceral afferent fibers carry information from __________.
Which of the following are not properties of enzymes?
Enzymes are biological catalysts that accelerate chemical reactions by lowering the activation energy. They have various properties, including lowering activation energy, providing an optimal environment, and participating in reactions. However, enzymes cannot break down the β-1,4 glycosidic linkage in cellulose, as it requires a specialized enzyme not present in humans.
Explanation:Enzymes are biological catalysts that speed up chemical reactions in the human body. They are not affected or used up in the reaction, making them reusable. Enzymes have specific properties that allow them to function effectively, including lowering the activation energy of a reaction, providing an optimal environment for the reaction, and participating directly in the chemical reaction. One property that is not exhibited by enzymes is the ability to break down the β-1,4 glycosidic linkage in cellulose, which requires a special enzyme that is absent in humans.
Learn more about Enzymes here:https://brainly.com/question/31561117
#SPJ11
Why is dna called the "double helix"? select one:
a. its structure was discovered by two workers, james watson and francis crick, a doubling of research effort at a building informally called the "helix" at cambridge university.
b. dna is double stranded, with the two strands both in the form of a helix entwined around each other like strands of a rope.
c. when dna interacts with rna, the two molecules form a twisted double strand.
d. it seemed like a catchy name even though it has nothing to do with the structure of dna?
Most caves and caverns originate by solution of limestone.
a. true
b. false
A synaptic cleft, and synaptic gap, can be found between a neuron and ______.
A synaptic cleft, or synaptic gap, is the small space between a neuron and its postsynaptic cell.
All of the following are examples of limiting factors in an ecosystem except
Population density is not the example of limiting factor.
Limiting factor is the factor which restricts the growth and abundance of population of species. Limiting factors can be space, food, and water any of the factors if not available to an organism the organism may not survive, grow, and reproduce. This can lead to the reduction in the population of species. Limiting factor is independent of the population density of the species for example, earthquake or forest fire can affect the species in an ecosystem irrespective of the size of the population of species.Learn more about limiting factor:
https://brainly.com/question/6996113
During the process of biological ______________, the concentration of pollutants, such as DDT or mercury, is multiplied as it passes up a food chain.
According to the text, we might expect to find this egg in which solution just before taking the photograph? A) egg in blue distilled water B) egg in 10% salt water C) egg in vinegar D) egg in syrup
Answer:
C) egg in syrup
Explanation:
Answer:
C) egg in syrup
Explanation:
The syrup is hypertonic, causing the egg to lose mass. Based on the passage and the data, this is a hyperonic solution to the contents of the egg.
In terms of processing in the nervous system, explain why your reaction time was most likely faster for the simple reaction task than for any of the discrimination tasks.
Reaction time is faster for the simple reaction task than for discrimination tasks because simple reactions involve fewer processing steps. Discrimination tasks require additional cognitive effort and involve analyzing multiple stimuli before generating a response.
Explanation:Your reaction time was most likely faster for the simple reaction task than for any of the discrimination tasks because processing in the nervous system for simple reactions involves fewer steps. In a simple reaction task, you only need to respond to a single stimulus with a single response. This means that the sensory information from the stimulus goes directly to the motor system, resulting in a faster reaction time.
On the other hand, discrimination tasks involve additional processing steps. In these tasks, you need to analyze and interpret multiple stimuli before generating a response. This requires more cognitive effort and involves the integration of sensory information, memory, and decision-making processes. As a result, the reaction time for discrimination tasks is typically longer compared to simple reaction tasks.
For example, if you are asked to press a button only when a red stimulus appears, you have to first identify the color of the stimulus, compare it to your selection criteria, and then produce the appropriate response. This additional processing time contributes to the slower reaction time for discrimination tasks.
The third level of cell organization is the _____.
A. tissue level
B. system level
C. organism level
D. organ level
Suppose that a dominant allele (P) codes for a polka-dot tail and a recessive allele (p) codes for a solid colored tail. If two heterozygous individuals with polka-dot tails mate, what's the probability of the phenotype and genotype combinations of the offspring?
A. 25 percent chance of a polka-dot tail and 75 percent chance of a solid colored tail (25 percent PP; 50 percent Pp; 25 percent pp)
B. 50 percent chance of a polka-dot tail and 50 percent chance of a solid colored tail (50 percent PP; 50 percent pp)
C. 75 percent chance of a polka-dot tail and 25 percent chance of a solid colored tail (25 percent PP; 50 percent Pp; 25 percent pp)
D. 75 percent chance of a polka-dot tail and 25 percent chance of a solid colored tail (75 percent Pp; 25 percent pp)
What hormone causes breast development and production of milk?
Which is the number of characteristics that define a living thing?
a. 6
b. 8
c. 4
d. 3
The part of the cytoskeleton made from the protein actin is called a
You can recognize the process of pinocytosis when _____. you can recognize the process of pinocytosis when _____. the cell is engulfing extracellular fluid a receptor protein is involved the cell is engulfing a large partic
Answer is “The cell is engulfing extracellular fluid”
Further explanation
Pinocytosis
Pinocytosis is a cell procedure by which liquids and supplements are ingested by cells. Additionally, it is called cell drinking, pinocytosis is a sort of endocytosis that includes the internal collapsing of the cell layer (plasma film) and the arrangement of layer bound, liquid-filled vesicles. These vesicles transport extracellular liquid and broke up particles (salts, sugars, and so forth.) crosswise over cells or store them in the cytoplasm.
When pinocytosis occurs?
It is started in the presence of wanted molecules in the extracellular liquid close to the cell surface. These particles may incorporate proteins, sugar atoms, and particles. Coming up next is a summed-up portrayal of the arrangement of occasions that happens during pinocytosis.
Step by step process of pinocytosis
The plasma membrane invaginates forming a cavity that loads up with extracellular liquid and disintegrated particles. The plasma membrane again folds on itself until the parts of the collapsed layer meet. This holds the liquid inside the vesicle. In certain cells, long channels likewise structure reaching out from the film profound into the cytoplasm. The fusion of the folded membrane cutoff the vesicle from the membrane, allowing the vesicle to drift towards the center of the cell. This vesicle fuse with lysosomes and discharge chemicals that tear vesicles and empty their substance into the cytoplasm to be used by the cell.Answer details
Subject: Biology
Level: High school
Key words
Pinocytosis When pinocytosis occurs? Step by step process of pinocytosisLearn more to evaluate
https://brainly.com/question/12887489
https://brainly.com/question/10560288
What is the most likely depositional environment for an evaporite unit?
sickle cell anemia is a disease that is caused by a change in the gene sequence by what
What effect does weather have on the process of photosynthesis?
In the ongoing processes of photosynthesis, respiration, and decomposition in the ocean, all components are recycled except _________.
Explain why we can infer that the universal common ancestor of all life on earth was unicellular heterotrophic
Final answer:
The Last Universal Common Ancestor (LUCA) is believed to be unicellular and heterotrophic because all life shares a universal genetic code and because early life forms, like archaeons, appear to have obtained energy from organic compounds in the environment. Limited molecular synthesis capabilities imply reliance on absorption, consistent with heterotrophic behavior. Despite some debate, the prevalence of heterotrophs over autotrophs in early earth conditions seems evident.
Explanation:
Universal Common Ancestor: Unicellular Heterotrophic Origins
We can infer that the universal common ancestor of all life on Earth, referred to as the Last Universal Common Ancestor or LUCA, was unicellular and heterotrophic based on shared characteristics of all cells. One key aspect that points to a common ancestor is the universal genetic code used by all known forms of life. This genetic code is vital for storing life's information and for retrieving the encoded information. Alongside genetic commonalities, cells, including those of bacteria, archaea, and eukaryotes, share the use of ribosomes for protein synthesis.
Early on, it is believed that primitive organisms, such as archaeons which are considered predecessors of bacteria and eukaryotes, were mostly heterotrophic. These organisms had limited capabilities to synthesize molecules and relied on absorbing substances from their surroundings. Their metabolism derived energy from organic compounds present in the environment rather than producing organic molecules on their own (autotrophs).
Scientific studies, including DNA sequencing, suggest that these early life forms engaged in processes similar to glycolysis, using environmental nutrients for energy, suggesting that the first cells were likely heterotrophs. In addition, the existence of early autotrophic life is a matter of debate, with recent discoveries pointing towards the Earth having a non-reducing atmosphere, which may have favored the appearance of autotrophs at thermal vents. However, many aspects regarding the composition of the prebiotic atmosphere and the conditions for life's origins are still contested.
It is generally agreed that only one ancestral heterotrophic species prevailed, giving rise to all cellular life following the evolutionary roadmap. This conclusion is bolstered by the shared cellular characteristics seen across diverse life forms, suggesting that they all diverged from a common heterotrophic ancestor - the LUCA.
Rescuers have just restored circulation to a 72 year old patient who was in cardiac arrest the patient's vital signs are b/p
This question pertains to the monitoring of a cardiac arrest patient's vital signs post-resuscitation. Blood pressure, among other vital signs, is critical in determining a patient's health status, especially in older individuals. It is worth noting that it is a standard practice in the medical field to closely monitor these crucial indicators after an episode of cardiac arrest.
Explanation:The subject in this scenario appears to be about a patient who was in cardiac arrest and their vital signs after resuscitation. The term 'b/p' refers to blood pressure, a critical vital sign in assessing a patient's health. After restoring circulation in a cardiac arrest patient, it is essential to monitor their vital signs. This includes blood pressure to ensure that oxygen and nutrients are being properly transported throughout the body. High or low blood pressure can be indicative of an underlying concern that needs immediate treatment.
Vital signs like blood pressure, pulse, respiration rate, and temperature are crucial indicators of body function and health. It's a medical practice to keep monitoring these vital signs and restoring them to optimal levels if something like a cardiac arrest happens. In this case, the patient being 72 years old is also significant as age can play a big role in recovery ability and patient treatment requirements.
Learn more about Cardiac Arrest here:https://brainly.com/question/36455742
#SPJ12
CPR is performed after cardiac arrest to restore circulation and minimize damage to essential organs like the brain. Post-arrest care can also include inducing controlled hypothermia to slow the patient's metabolic rate and reduce the heart's workload. Monitoring vital signs post-restoration is essential.
Explanation:The situation described relates to a patient who has experienced a cardiac arrest and has had circulation restored thanks to interventions likely including cardiopulmonary resuscitation (CPR). CPR is an emergency technique that involves manually compressing the blood within the heart in order to push it into the pulmonary and systemic circuits. This is crucial, especially for the brain since irreversible damage and death of neurons can occur within a few minutes of loss of blood flow. Post-arrest care can also involve cooling the patient's body to around 91 degrees Fahrenheit, a method known as controlled hypothermia, to reduce the heart's workload by slowing the patient's metabolic rate. Monitoring and maintaining vital signs such as blood pressure post-restoration is a critical aspect of medical care for such patients.
Learn more about Post-Cardiac Arrest Care here:https://brainly.com/question/28240052
#SPJ2
Describe the 5 types of species interactions
Which one of the following is NOT a branch of anthropology?
archeology
osteology
pathology
taphonomy
taphonomy is the answer
What are the roles of chlorophyll and chloroplasts in photosynthesis?