A true breeding plant is one that when self fertilized only produces offspring with the same traits. True breeding organisms are genetically identical and have identical alleles for specific traits. The alleles for these organisms are homozygous.
At present, cosmologists expect the universe to _____. gradually stop its expansion and then begin to shrink in size gradually stop its expansion and then remain at a constant size continue to expand and heat up continue to expand and cool
Answer:
The correct answer is option D, continue to expand and cool
Explanation:
The concept of expanding universe was first time discovered by Einstein's theory . The solutions obtained through his relativity theory has red shifting of light when they come from distant objects travelling all through the expanding universe. Further in 1929, it was proved by Edwin Hubble that universe is expanding when he plotted the curve between the red shift against the relative distance.
Form this it was further linked that due to expansion of universe there can be effect of red shift in the spectrum of the light as the wavelength would have become longer than earlier which would lead to decrease in temperature associated with spectrum and thus the universe keep on cooling continuously as it expands continuously.
Which eye condition is characterized by increased intraocular pressure?
Meningo- and meningio- mean membrane. (mening/itis; mening/ioma)
a. True
b. False
Jerry tries to manage his stress by tuning in to every sensation in his body, from the itch in his lower back to the flutter of an eyelid. which stress management technique is he using
Jerry is using a stress management technique known as body scan mindfulness.
Explanation:Jerry is using a stress management technique known as body scan mindfulness. This technique involves tuning in to every sensation in the body and being fully present in the moment. By focusing on the physical sensations, Jerry is able to bring his attention away from his stressors and promote relaxation. For example, he may notice the sensation of an itch in his lower back or the flutter of an eyelid and observe them without judgment.
Which term refers to the ability of a species or organism to survive and reproduce?
(blank) is the ability of a species or organism to survive and reproduce.
Answer: Fitness
Explanation:
Fitness of an organism defines the ability of the organism to survive and reproduce in a condition. The condition can be feasible or non feasible.
In case the condition is feasible the organism will survive and reproduce but in case the environment is not feasible then the fittest organism will adapt the environment and survive in the situation.
Hence, the fitness of the organism will allow it to adapt the environment, survive and reproduce.
Who can witness a lunar eclipse
A lunar eclipse can be witnessed by anyone on the night side of the Earth when the eclipse occurs.
Unlike solar eclipses, which are visible only in specific regions, a lunar eclipse is visible from anywhere on Earth where the Moon is above the horizon. This means people across multiple continents can observe it simultaneously, provided they have clear skies.
Lunar eclipses happen when the Earth comes between the Sun and the Moon, casting a shadow on the Moon. There are three types: total, partial, and penumbral eclipses, with total eclipses being the most dramatic. During a total lunar eclipse, the Moon often takes on a reddish hue, earning it the nickname "Blood Moon."
The timing of the eclipse depends on geographic location, but as long as it's nighttime and the sky is clear, anyone can enjoy this celestial event.
Which word pair makes the following statement true? The process of _____ leads to the formation of new species by _____. A) extinction, speciation B) speciation, use and disuse C) natural selection, evolution D) divergent evolution,natural selection
What are the three enzymes that aid in dna replication, and what do they do exactly?
When we have a factor that always causes a disease and also demonstrates that the disease cannot occur without that factor, we say that it is ____? hint: this situation does not occur in reality. necessary and sufficient necessary but not sufficient sufficient but not necessary neither sufficient nor necessary?
In vertebrate animals, spermatogenesis and oogenesis differ in that ________.
What is sexual reproduction? (Between Mitosis and Meiosis)
/////////////////////////////////////////////////////
Select the answer that has the correct order of the steps of the scientific method.
A patient with muscular dystrophy starts to receive stem cells that generate muscle tissue. Which is the best prediction of what will happen to the patient's muscle function?
This answer to this question is... im almost 100 percent sure ;) .... B , Muscle function should increase because the cells would produce muscle tissue!!!!
Summarize the structure of DNA. Include information about the nitrogenous bases, sugars, and composition of the backbone. Which nitrogenous bases pair up together in DNA? RNA? Explain where covalent and hydrogen bonds are located. Also, fully explain the process of the central dogma (DNA, RNA, Proteins) in correlation of protein synthesis (DNA transcription and translation).
DNA backbone is made up of deoxyribose monomer sugars as the basic unit that are covalently connected in chains. Each deoxyribose sugar is a five (5)-carbon ring. The 5’ carbon covalently bonds with a phosphate while the 3’ carbon bonds to the next deoxyribose carbon ring. The 1’ carbon is covalently bonded to a nitrogenous base (either Adenine, Thymine, Cytosine, or Guanine ).
In DNA, Cytosine pairs with Guanine, and Adenine pairs with Thymine. In RNA, the same principle applies only that RNA has no Adenine base but Uracil. Therefore, Thymine pairs with Uracil while, similar to in DNA, Cytosine pairs with Guanine.
Covalent bonds occur in virtually all the bonds except between nitrogenous base pairs of opposite strands of DNA.
The central Dogma stipulates that DNA --à RNA--àProtein. During transcription, information on DNA is copied to messenger- RNA. In eukaryotes messenger- RNA moves to the cytoplasm where it is then translated to protein by ribosomes. In prokaryotes, since there is no nucleus, the mRNA is translated even as transcription continues.
What is the name of the organ that lines part of the wall of the uterus and nourishes the embryo with substances from the mothers blood?
In which atmospheric layer does most of the greenhouse effect occur answer?
Answer:
Troposphere
Explanation:
The troposphere is the layer of atmosphere that contain four major greenhouse gases and therefore, is the site for the greenhouse effect. The greenhouse gases present in the lower troposphere are water vapor, carbon dioxide, methane, and nitrous oxide.
These greenhouse gases trap the radiations reflected back by earth's surface during the night. These trapped radiations serve to increase the earth's atmosphere.
In leghorn chickens colored feathers are produced by a dominant allele,
c. white feathers are produced by the recessive allele,
c. the dominant allele, i, of another independent gene inhibits expression of color in birds with genotypes cc or cc, giving them a white phenotype as well. a colored rooster is mated with a white hen and produces many offspring, all colored. give the genotypes of both parents and the offspring.
The rooster's genotype is Ccii, carrying the colored allele without an inhibitor gene. The hen's genotype is ccII, carrying the white phenotype and the inhibitor gene causing her to appear white. All the offspring have the colored phenotype as they will get the colored allele from the rooster and a non-inhibiting allele from the hen.
Explanation:In this scenario, the colored feathers in Leghorn chickens are dominant and represented by 'C'. The white feathers are recessive and are represented by 'c'. There is also a second gene, 'I', that inhibits the expression of color when its genotype is either 'II' or 'Ii' and gives these chickens a white phenotype. If a colored rooster was mated with a white hen and all the offspring were colored, the following genotypes of the parents and offspring can be inferred:
Rooster (Male parent): genotype 'Ccii', meaning he carries the colored allele (being dominant over white), but with not inhibitor gene.
Hen (Female parent): genotype 'cCII', meaning she carries the white phenotype but also has the inhibitor gene, causing her to appear white.
Offspring: All will have the phenotype of colored feathers (since the cross between Ccii and ccII will give colored offspring genotype of CcIi in all cases).
Learn more about Genotypes and Phenotypes here:https://brainly.com/question/26124553
#SPJ11
What is the source of the bacteria in the culture tube in model 1? 2. how many genetic variants of
e.coli were present in the culture from the initial swab?
The source of bacteria in the culture tube in model 1 is from a swab of a desktop. Moreover, there are four variants in the E. coli culture from the initial swab and the variants of E.coli found on the dish grown with triclosan are evolution and selection.
Final answer:
The bacteria in a culture tube model often come from a specimen from the body, with the number of genetic variants determined by colony morphology on a streak plate. After 3 hours, a culture of 1000 E. coli with a 30-minute generation time would grow to around 64,000 bacteria. Detailed drawings or images of streak plates help in observing microbial growth and identifying distinct colony morphologies.
Explanation:
The source of the bacteria in the culture tube in model 1 is typically obtained from a specimen swabbed from a region of the body, such as the skin, and transferred to a culture medium. The number of genetic variants of E. coli in the culture from the initial swab can be determined by observing the different types of colonies that form on a streak plate. These colonies display various aspects of colony morphology such as shape, size, color, and texture, which can help identify different bacterial strains.
When starting with a culture of 1000 E. coli bacteria with a generation time of 30 minutes, one would expect the number of bacteria to increase exponentially as each bacterium divides. After 3 hours, which is 6 generation times (3 hours / 0.5 hour per generation = 6 generations), the number of bacteria would be expected to increase by a factor of 26, or 64 times, resulting in a total population of around 64,000 bacteria (1000 initial bacteria × 26).
During a microbiology lab exercise, students are often instructed to make detailed drawings or take images of their plates, describe the colonial morphology, and use streak-plate techniques to isolate and obtain pure cultures. Streak plating helps dilute the sample to achieve isolated colonies, where each colony usually represents the growth of one bacterial cell. This method allows the oldest section of the streak plate to generally have the most growth, while the newest streaked section has the least.
__________ is the most prevalent and most curable type of cancer found in women
Skin Cancer is the most prevalent and most curable type of cancer found in women
Further ExplanationSkin cancer may be a variety of cancer that grows in skin tissue. This condition is characterized by changes within the skin, like the looks of bumps, spots, or moles with abnormal shape and size. carcinoma is strongly suspected to be caused by exposure to ultraviolet rays from the sun. This UV light can cause damage to cells within the skin, causing carcinoma.
There are three styles of carcinoma that the majority often occur, namely:
Basal cell carcinoma, which may be a carcinoma originating from cells within the deepest a part of the outer skin layer (epidermis).
Squamous cell carcinoma, a carcinoma originating from cells within the middle and outer portion of the epidermis.
Melanoma, which may be a carcinoma originating from skin pigment-producing cells (melanocytes).
Skin cancer is caused by genetic changes or mutations in skin cells. The explanation for the change itself isn't known with certainty but is believed to result in excessive sun exposure.
Ultraviolet light from the sun can damage the skin and trigger abnormal growth in skin cells. This condition has the potential to become cancer.
Symptoms or signs of carcinoma generally appear on parts of the body that are often exposed to sunlight, like the scalp, face, ears, neck, arms, or legs. However, carcinoma may occur in parts of the body that are rarely exposed to sunlight, like the palms of the hands, feet, or perhaps the genital area.
Learn more
skin cancer https://brainly.com/question/9909016
Details
Grade: High School
Subject: Biology
keywords: skin cancer
The hormones _____ play an important role in the regulation of the nephron's ability to reabsorb salt and water.
The fluid mosaic model shown above describes the structure and function of
A.
nuclei.
B.
cell membranes.
C.
chloroplasts.
D.
chromosomes.
Answer:
The correct answer would be B. cell membranes.
Fluid mosaic model is one of the models which explains the structure of functional cell membrane.
It explains cell membrane as the mosaic structure made up of components like phospholipid, proteins, cholesterol, and carbohydrates which provide the cell membrane a fluid nature.
Phospholipids are the prime component of the lipid bilayer. Proteins are embedded in the lipid bilayer structure and serve different functions like cell signaling.
In a hydra, digestion is completed ________. in a hydra, digestion is completed ________. in the alimentary canal in the gastrovascular cavity intracellularly extracellularly
Answer:
intracellularly
Explanation:
Green Hydra Scientific name hydra viridissima, is one of the simplest animals among multicellular Celentéreos animals. It belongs to the Hydrozoans.
The green hydra has a simple cavity that communicates to the outside through the mouth, which is surrounded by tentacles. Nutrition is effected by the pressure of small animals such as tiny Crustaceans, larvae of Insects, among others, sometimes swallowing prey larger than itself. By touching the animal with its tentacles to an animal all the nematocysts are discharged at the same time, some inoculate the paralyzing substance they possess; while others are rolled over the victim's body. Once this happens the tentacles are responsible for driving the food into the mouth, where it enters the gastrovascular cavity. The food undergoes in that cavity an extracellular digestion motivated by the gastric juices segregated by the glandular cells that cover this cavity, in something similar to the digestion that takes place in the superior animals. Flagellated cells move nutrient fluid that is in the gastric cavity and seize the undissolved particles, which are encompassed by those cells and directed inside. This intracellular digestion is analogous to that performed by the Protozoa. Insoluble particles are expelled through the mouth's own opening.
How did the discovery of ribozymes assist in creating a plausible model for the prebiotic origin of life?
What is the function of transfer RNA?
Transfer RNA (tRNA) is an adaptor molecule that carries amino acids to the ribosome for protein synthesis, ensuring genetic codes on mRNA are expressed as precise protein structures.
The function of transfer RNA (tRNA) is to serve as a key molecular adaptor in the translation process of synthesizing proteins from genetic information. This involves binding to a specific amino acid in the cytoplasm and delivering it to the ribosome, where protein synthesis occurs. The tRNA molecule features two critical regions: the amino acid-accepting end and a three-nucleotide sequence known as the anticodon, which pairs with the complementary codon on messenger RNA (mRNA). Through this pairing, tRNAs ensure that each amino acid is correctly inserted into the growing polypeptide chain in accordance with the genetic instructions contained within the mRNA.
The half life of Carbon 14 is 5500 years. How many years will pass for a 30 gram sample to reach 3.75 grams
The time it will take for a 30-gram sample of Carbon-14 to decay to 3.75 grams is 16500 years. This conclusion is reached as 3.75 gram is 1/8th of the original 30 gram sample, corresponding to 3 half-lifes of Carbon-14 (each of 5500 years). Hence, 3 half-lives took place which equals to total of 16500 years.
Explanation:The half-life of a radioactive substance is the time it takes for half of the atoms in a sample to decay. In this case, the half-life of Carbon-14 is 5500 years which means that every 5500 years, only half of the initial amount of Carbon-14 remains. We want to find the time it will take a 30 gram sample to reach 3.75 grams, which is 1/8 of the initial amount. Therefore, we need to consider 3 half-lives:
After 1 half-life (5500 years), the original 30 grams would be reduced to 15 grams.After the second half-life (another 5500 years), the 15 grams would be reduced to 7.5 grams.After the third half-life (another 5500 years), the 7.5 grams would finally be reduced to 3.75 grams.So, the total time taken would be 3 * 5500 = 16500 years (which comprises of three half-lives of Carbon-14).
Learn more about Half-life here:https://brainly.com/question/24710827
#SPJ3
What is the process by which animals wind and rain transfer pollen to the pistil of a flower
Pollination is the process by which animals, wind, and rain transfer pollen to the pistil of a flower.
- Prodixy ☕
Blood leaving the heart for the body passes through a large blood vessel is called the
Answer:
Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium.
Explanation:
What did steven blair mean in his article, "in essence, physical inactivity is the common denominator for the clinical treatment of low fitness and excess weight". what should we focus on?
What auxiliary label should be attached to amoxil 250mg/5cc suspension?
The capacity of organs to allow the body to cope with stress via extra, unused functioning ability is referred to as _____. organ reserve senescence homeostasis diathesis previous next
Answer:
Explanation:
obtain energy.