A thornless rose species likely evolved due to natural selection where thornless variants had an advantage, leading to increased prevalence of this trait over time.
Biologists would explain the evolution of a species of rose without thorns as a process influenced by natural selection and genetic mutations. Thorns are mechanical defenses that protect roses from herbivores, but in some environments, thorns may not be necessary, or their costs may outweigh their benefits. A mutation might arise that results in a rose without thorns. If the environment favors thornless roses due to decreased pressure from herbivores or energy savings, these thornless roses would have a selective advantage.
Over generations, the frequency of the thornless trait would increase in the population, leading to a new species of thornless roses through the process of evolutionary adaptation.
The _____ of water molecules explains how some insects can walk on water
The surface tension of water molecules explains how some insects can walk on water.
Surface tension is a property of liquids that occurs because of the cohesive forces between molecules at the surface. In the case of water, each molecule is held to the surrounding molecules by strong hydrogen bonds. These cohesive forces are exerted in all directions on molecules in the center of the liquid.
However, molecules at the surface experience the force only from the sides and below, which pulls them more closely together and creates a 'surface film' that is harder to break. This surface film allows small, lightweight insects, like water striders, to walk on water.
They distribute their weight over a larger area, which prevents them from breaking through the surface tension and sinking. Essentially, they take advantage of the strong intermolecular forces at the surface of the water to support their weight.
Which Greek geometer founded a philosophical society that devoted itself to the study of mathematics? Thales Pythagoras Euclid Hippocrates
Answer:
The correct answer is pythagoras.
Explanation:
Pythagoras was a greek geometer. He created the famous mathemetics formula called pythagoras formula that is helpful to find the relationship between the all three sides of triangles. Pythagoras formula has significant contribution to world, especially in architectures.
Thus, the correct answer is pythagoras.
Which of the cellular organelles would be included in membranous canals and vacuoles?
The Endoplasmic Reticulum and Golgi Apparatus are the organelles included in membranous canals, and vacuoles are membrane-bound sacs involved in storing and maintaining cell structure.
Explanation:The cellular organelles that would be included in membranous canals and vacuoles are the Endoplasmic Reticulum (ER) and the Golgi Apparatus. The ER is a network of membranous tubules and sacs called cisternae, and it plays an important role in the synthesis of proteins and lipids. The Golgi Apparatus, on the other hand, is involved in the sorting, modification, and shipping of products produced in the ER. Both of these organelles constitute the 'membranous canals' in a cell. Vacuoles are essentially membrane-bound sacs filled with water containing inorganic and organic molecules including enzymes, and play a crucial role in maintaining the shape of plant cells and in storing waste products.
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A student brings a specimen and claims it is a living organism. Explain how a microscope could be used to determine if the specimen is a living thing.
If you stub your toe, how does the impulse travel through your nervous system allowing you to pull your toe back and jump up and down in pain?
When you stub your toe, sensory nerves send a signal to the spinal cord, where an interneuron helps form a reflex arc that prompts a motor nerve to instantly contract the muscles for withdrawal, all without involving the brain.
Explanation:When you stub your toe, a rapid sequence of events occurs within your nervous system to produce a response. The peripheral nervous system sends a signal from the injured toe to the spinal cord through sensory nerves. At the spinal cord, the signal is transferred to an interneuron and then to a motor nerve, which relays the command back to the muscles in your toe and leg. This connection, known as the reflex arc, allows for an immediate withdrawal response without involving the brain, permitting a quick reaction to potentially harmful stimuli. If you were to step on a sharp object, the pain-sensing nociceptors would activate the motor neurons for the tibialis anterior muscle, causing dorsiflexion of the foot, while an inhibitory interneuron would prevent the plantar flexion by inhibiting the gastrocnemius and soleus muscles, thus minimizing potential injury.
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what is the kingdom of fungi
Judging from information obtained in surveys, the dominant abused prescription pain relieving medication is ______
How do these differences relate to the functions of these two similar epithelium?
Squamous and cuboidal epithelium, while similar in being epithelium, differ in function and location, with the squamous epithelium primarily serving as a protective barrier, and cuboidal epithelium contributing to secretion and absorption.
Explanation:The two similar epithelium referred to here, without specific given examples, might be squamous and cuboidal epithelium. Squamous epithelium, which is flat and scale-like, primarily functions as a barrier, protecting underlying tissues. For instance, it can be found in the skin where it acts as a barrier to the external environment. In contrast, cuboidal epithelium is square or cube-shaped and functions in secretion or absorption. Examples are the kidney tubules where cuboidal cells reabsorb water and electrolytes, or glandular tissue where these cells secrete substances such as hormones. By their shape and structure, they define their function in the body.
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What are the common structural characteristics of atp and dna molecules?
ATP and DNA molecules share common structural characteristics such as sugar, phosphate groups, and nitrogenous bases.
Explanation:The common structural characteristics of ATP (adenosine triphosphate) and DNA (deoxyribonucleic acid) molecules are:
Sugar: Both molecules contain a sugar component. ATP contains a five-carbon sugar called ribose, while DNA contains a five-carbon sugar called deoxyribose.Phosphate groups: Both molecules contain phosphate groups. ATP has three phosphate groups, while DNA has one phosphate group in each nucleotide.Nitrogenous base: Both molecules contain a nitrogenous base. ATP has adenine as its nitrogenous base, while DNA has adenine, cytosine, guanine, and thymine as its nitrogenous bases.When the cervix of a woman in labor is dilated 9 cm, she states that she has the urge to push. which action should the nurse implement at this time?
which term refers to the structure that form the surface of a cell separating it content from the outside world
The structure of eugenol is given below. select which functional group below is present in eugenol.
Using the table shown, identify which proteins would migrate together during sds-page in the absence of 2-mercaptoethanol.
A student sets up an experiment with two groups of bacteria. One group is exposed to the normal amount of mercury found in the environment. The other group gets a larger dose. Which term describes the normally treated group? A. independent group B. control group C. variable group D. experimental group
Your answer will be control group.
Rna processing drag the correct labels under the diagrams to identify the events of rna processing.
RNA processing involves several steps that transform pre-mRNA into mature mRNA, including 5' capping, polyadenylation, and splicing.
Explanation:In RNA processing, the pre-mRNA molecule undergoes several changes before it becomes mature mRNA ready for translation. The main events include:
5' capping: A modified guanine nucleotide is added to the 5' end of the pre-mRNA molecule.Polyadenylation: A sequence of adenine nucleotides (poly-A tail) is added to the 3' end of the pre-mRNA molecule.Splicing: Introns (non-coding sequences) are removed, and exons (coding sequences) are joined together.These steps ensure that the mature mRNA is stable, is able to leave the nucleus, and can be accurately translated into a functional protein.
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(Experiment 1: Diffusion through a liquid) Does the rate of diffusion correcspond with the molecular weight of the dye?
Mary, age 37, is pregnant for the first time, and her doctor has ordered a series of routine screening procedures. mary’s doctor probably will not order:
glucose,fructose,and sucrose are all carbohydrates.what elements make up all carbohydrates
What are reactants in the process of photosynthesis? Check all that apply.
carbon dioxide
oxygen
nitrogen
water
energy
glucose
Answer:
Carbon dioxide, water, and energy.
Explanation:
Photosynthesis, which means “synthesis using light”, is generally defined as the process by which an organism can obtain its food. This process is accomplished thanks to solar energy, which is captured and transformed into chemical energy. The photosynthesis process occurs in chloroplast-rich tissues, one of the most active tissues being the chlorophyll parenchyma found in the leaves.
Since photosynthesis is a chemical reaction, it has products and reagents. Photosynthesis reagents are carbon dioxide, water and energy, while products are oxygen, glycides and water.
Answer:
A.) Carbon Dioxide, D.)Water, and E.) Energy
Explanation:
Daily rhythms of sleep and wakefulness are regulated by the _____, which is located in the _____.
What is the general shape of the epithelial cells that are nearest the lumen in an empty urinary bladder?
The general shape of the epithelial cells that are nearest to the lumen during an empty urinary bladder of an individual is transitional cuboidal epithelium, they are cuboidal in shape as they are relaxed and later transition when stretched and filled with urine.
Organisms that derive their energy from the sun and carbon from carbon dioxide are:
Research indicates that ___ releases painkilling chemicals in the brain
The nurse and the client are using therapeutic communication skills. which statements are true of concrete and abstract messages? select all that apply.
Which genetic condition is found at an unexpected high frequency among the hopi native americans?
What makes atoms of one element different from the atoms of another element?
According to the drug enforcement administration, drug addiction is __________.
what is the definition of homozygous
Homozygous refers to the condition where an individual possesses two identical alleles for a particular gene, either both dominant or both recessive, impacting the expression of traits and contributing to the genetic diversity within a population.
Homozygous refers to a genetic condition in which an individual possesses two identical alleles for a particular gene, both inherited from either the mother or the father. In a diploid organism, such as humans, each individual inherits one allele from each parent for a given gene.
The term homozygous is derived from "homo," meaning same, and "zygote," which is the initial cell formed when two gamete cells (sperm and egg) fuse during fertilization. The alleles can be either dominant or recessive, representing different forms of a gene. If an individual is homozygous dominant, it means both alleles are the dominant form. If homozygous recessive, both alleles are the recessive form.
For example, in a simplified scenario where "A" represents the dominant allele for a certain trait and "a" represents the recessive allele, an individual with the genotype "AA" is homozygous dominant, while an individual with the genotype "aa" is homozygous recessive.
Homozygosity plays a crucial role in determining the expression of traits in an organism. It influences the phenotype, or observable characteristics, of an individual. Homozygous individuals express traits according to the specific alleles they carry, providing insight into the inheritance patterns and diversity within a population.
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Why is the percentage of food eaten a good number to use? Explain.
The percentage of food eaten is a good number to use because it compares the number of food eaten to the number of birds in the flock. If the resulting number from this multiplication is low, then the flock is unsuccessful in the collection of food - causing it to shrink. If the resulting number is high then the flock has been successful in the gathering of their food - causing the flock to grow.
Which part of a watershed is the high point of land that separates adjacent watersheds
A. The basin
B. The divide
C. The collection area
D. The boundary
The part of a watershed that separates adjacent watersheds is the collection area.
What is a watershed?Watershed is a term used to characterize a delimited portion of the territory, drained by a main river and its tributaries. The waters of the hydrographic basin flow in the same direction and go towards the lower portion of the topographic area, following the pattern of the relief.
With this information, we can conclude that the highest part of the hydrographic basin that separates them is The collection area.
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