Volcanic ash can be used to date fossil finds because each time it is expelled by an eruption it has the same relative proportions of radioactive isotopes. True or False
Q: how does each of these factors influences the variation in the geographic distribution of species. ...
A: INTRODUCTION The individual species may isolate directly from each population ecology. Many spe...
Q: Please briefly explain the ATP_modulated actomyosih cycle.
A: Every myosin motor protein has ATPase activity and works in a periodic fashion, with ATP binding and...
Q: The table below shows taxonomic information for the gray wolf and four other species. Gray Wolf Spec...
A: D. 123
Q: Animals attract mates through a variety of behaviors. Diurnal animals tend to rely on visual cues, w...
A: Endocrine disruptors, also known as hormonally active agents, endocrine disruptive chemicals, or end...
Q: O biolistics
A:
Q: In cattle "short spine" is lethal shortly after birth: it is caused by the homozygous recessive geno...
A: "Genetics" is the study of the functioning and main codes of variation and heredity. Inheritance is ...
Q: elicited by the Coronavirus. Instruction: Differentiate the two: Antigen vs Immunogen. 1. What ...
A: Answer :: Antigen vs immunogen 1) The CO stands for corona, VI for virus, and D for disease. Forme...
Q: The siRNA and miRNA pathways share many similarities and also have some differences. Which of the fo...
A: The gene regulation by using small single standard RNA is mediated by the functioning of siRNA and m...
Q: Based on the data in the table below, determine whether mutualism will evolve in Species 1 and Speci...
A: * Mutualism an interaction between two species in which both species will get benifits. *Examples ar...
Q: 1. Which pair of animals in numbers 1-3 belongs to a common ancestral group? Explain your answer. 2...
A: Evolution is process of development of plants and animals over thousands of year from simple to adva...
Q: 1. COMPARE AND CONTRAST the GEL FILTRATION and ISOELCTRIC PRECIPITATION in terms of the principles g...
A: Compare and contrast the gel filtration and isoelectric precipitation in terms of the principles gov...
Q: A eukaryotic gene is added to a mixture containing a restriction enzyme EcoRI and a bacterial plasmi...
A: The EcoRI restriction site is present in tetracycline resistance gene. This meand that while ligatin...
Q: The pericardial cavity is a part of which cavity? pelvic cavity abdominal cavity pleural cavity tho...
A: 4. Thoracic cavity
Q: 11: All of the following are features associated with the earliest members of the genus Homo (e.g., ...
A: Features associated with Homo habilis except-
Q: 21. The binding of aspartate to different subunits of ATPase is an example of a. Negative cooperativ...
A: Introduction :- A homotropic allosteric modulator is both a substrate and a regulatory molecule for ...
Q: Within the flippase family is the flippase protein that works in the golgi and the scramblase protei...
A: * Flippase and scramblase are main enzymes that can change the phospholipid positions in cell membra...
Q: plant uses 54 ATP to build one glucose molecule, but only gets 36 ATP when it breaks the sugar down ...
A: Introduction:- ATP (adenosine triphosphate) is an energy-carrying molecule found in all living creat...
Q: explain the two major stages of photosynthesis (light dependent and independent reactions).
A: There are two major stages of photosynthesis, The light reaction The dark reaction. The light rea...
Q: If you were asked to choose one of the following invertebrate as a pet (protozoa, sponges, and placo...
A: Protozoans *protozoans are single celled eukaryotes that lives free living or parasitic means that t...
Q: A protein uses a gene template in 3' to 5' direction. What are the amino acid sequences following th...
A: The protein is synthesized from mRNA by the process of translation. It takes place in cytoplasm of c...
Q: Synapsis and crossing over [Choose ] [Choose] Prophase II Telophase II Prophase I Telophase I Spindl...
A: Synapsis & crossing over - Prophase 1. Spindle form - Prophase 2. Chromosome decondensed - Telop...
Q: (a) Name the following : (i) The type of cell division which occurs in the cells of the reproductive...
A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and s...
Q: need help with this questions just 2-3 sentences please. In the Ti-plasmid in Agrobacterium tumefaci...
A: Ti-plasmid in Agrobacterium tumefaciens contains a gene that encodes octopine synthase. This gene ca...
Q: A mess of 40 iguanas moved to a new island which is so large that the carrying capacity is essential...
A: Total 40 iguanas moved to a new island Growth rate = 0.6 = 60% Generation time = 2 years Total ti...
Q: Can you consider a living thing that does not seem to interact with other living things as a compone...
A: Ecosystem It is defined as a geographical region where plants, animals, other species, weather, etc ...
Q: What is the Rh factor?
A: Introduction In this question we will discuss about the Rh factor.
Q: what are plant habits? what are the types of plant habits?
A: Plant Kingdom is a kingdom which consists of autotrophic photosynthetic organisms that is plants . I...
Q: II. Write the letter of the correct answer. Choices for 1-10: A. intracellular fluid B. extracellula...
A: 1. Interstitial fluid is the body fluid between blood vessels and cells, containing nutrients from ...
Q: MODELLING HUMAN MITOISIS ACTIVITY In SOMATIC CELLS INTERPHASE (G,> s G,) Cell membrane • Nuclear mem...
A: During interphase, the cell grows and the nuclear DNA is duplicated
Q: Name ONE automated cell counter and describe its working principles
A: Cell counters that count cells automatically are known as automated cell counters. The sample is fed...
Q: Castrated boar will help to detect which sows are in heat? True or False
A: Introduction Castration is the removal or inactivation of the testicles of a male animal and Castrat...
Q: In chickens Cis dominent to to c.C alters development to produce crooked shert legs end winge Creepe...
A: A dominant allele expresses itself by masking the expression of another gene (recessive). It is ment...
Q: Which bacterium does not have gelatinase enzymes O A. Staphylococcus aureus B. Bacillus subtilis O C...
A: Gelatin hydrolysis test is used to identify the bacteria which can digest or degrade the gelatin by ...
Q: Prevention of genetic abnormalities by reducing the number of chromosomes in a cell by half. meiosis...
A: Cell Cycle: A cell cycle is a set of events that occur in a cell as it divides and grows. A cell sp...
Q: A culture of a certain bacterium grows according to the law of exponential growth. If there were 130...
A: The exponential period of expansion is a form of balanced growth in which all cells/bacteria divide ...
Q: The number of bacteria in a sample can also be quantified with other techniques, such as examination...
A: In microbiology laboratories the number of microorganisms present in a particular sample is determin...
Q: 60 2400 50 2000 1600 1200 20 800 10 400 1 4 Generations - Wolf population Elk population Number of w...
A: Predator- prey relationship is very useful to maintain the ecosystem. In this relationship, one spe...
Q: 4. Do some Internet research to learn about the founders of both Xhale and Vestagen. To what degree ...
A: Answer
Q: 2. Examine the phylogeny below, which is the phylogeny for all extant species from a genus of birds,...
A: Phylogeny for extant species refers to the evolution history of a group of species that are living a...
Q: In an isometric contraction the muscle develops tension but does not - exhibit elasticity does not e...
A: * there are three types of muscle contractions present are: Concentric Eccentric Isometric Conc...
Q: 4. Cross a yellow parakeet (bbYy) with a white parakeet. What is the genotype of and phenotype of th...
A: * Given that yellow parakeet has genotype bbYy . * So the white parakeet genotype will be BBYy. *The...
Q: SPECIMEN LEAF MODIFICATION SPECIALIZED FUNCTION Allium cepa Leaf base: Leaf stalk: Shape of leav...
A: Allium cepa It is commonly known as an onion or bulb onion. It is a vegetable and is the most cultiv...
Q: In corn, kernel color is governed by a dominant allele for white color (A) and by a recessive allele...
A: Given data: Frequency of heterozygous genotypes? Total kernels= 152 Tatal white kernels (homozygous...
Q: Write an introduction of the isolation and purification of bacteriophage with host Escherichia coli
A:
Q: How is blood typing for the ABO system and the Rh usually done?
A: In this question we will discuss about how is blood typing for the ABO system and the Rh usually do...
Q: 2. Imagine that you have given blood, but a sample of your red blood cells is accidentally stored in...
A: Red blood cells mean RBCs are responsible for the red color of blood.RBC is placed in saline water b...
Q: Question 10. Why does the sarcomere length appear to shorten (from Z line to Z line) when a muscle c...
A: The striations on muscles are formed due to a pile of sarcomeres. It encompasses the basic structure...
Q: 1. What specific purpose does the tube having substrate and distilled water serve? It's a controlled...
A: Experiment variables An experiment have different variables which are any factor, trait or any cond...
Q: Activity 7.2: Directions: Complete the diagram by filling up the words from the box. Energy Flow Ino...
A: Ecosystems require a constant supply of energy to power biological processes and replenish energy lo...
Q: In which cell would you expect to find the most Golgi bodies? a. Cardiac muscle b. Epithelia cells c...
A: Introduction Golgi body:- A Golgi body, also known as a Golgi apparatus, is a cell organelle which i...
Volcanic ash can be used to date fossil finds because each time it is expelled by an eruption it has the same relative proportions of radioactive isotopes.
True or False
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- Which parent isotope is most useful for dating samples that are greater than 100 million years old? a potassium-40 b lead-206 c argon-40 d uranium-238Suppose a scientist finds a rock with an interesting fossil. Curious to know the age of the fossil, she takes the rock to a lab. The lab determines the amount of rubidium (Rb) and strontium (Sr) in the rock. The scientist is familiar with radiometric dating and knows that she can now calculate the age of the rock, 1, using an isochron. The Rb-Sr isochron equation is 87. Rb. [edr – 1] 86 °Sr. 87 87 Sro 86 Sro 86 Sr. 87. Rb 3.807 and 89.60. In a published table, she finds that Using the lab's values, she calculates the isotope ratios as 86 Sr. 87 = 0.7129. She also finds that the decay constant, 86 the ratio of strontium-87 to strontium-86 at the formation of the rock was Sro 2, for rubidium-87 is 1.42 x 10-11. Use the equation and provided data to calculate t. Put your answer in scientific notation and round to the nearest tenth. years x10 What is the approximate age of the rock in billions of years? Round to the nearest tenth. billions of years t =The most useful method for dating ancient calcium rich cave deposits would be Group of answer choices A: Argon-Argon Dating B: Paleomagnetic Reversals C: Electron Spin Resonance Dating D: Uranium-Thorium Dating E: Potassium-Argon Dating
- A scientist has a fossil that was found in a layer of rock close to Earth’s surface. He believes that the fossil is around 12,000 years old. Which method would best allow the scientist to confirm the actual age of the fossil? finding another fossil in a deeper layer of rock finding another fossil in the same layer of rock using carbon/nitrogen absolute dating using potassium/argon absolute datingRadiometric dating measures the decay of radioactive isotopes present in layers where fossils are found. True FalseRadiometric dating uses the decay of to to determine how old fossils of biological material are using the rate of decay. Group of answer choices 14C, 12C 14N, 12C 12C, 14N 14C, 14N
- Radiometric dating does not measure the age of an individual atom. It is a measure of the age of a quantity of atoms—a statistic. As with any statistical measure, its values may deviate around an average (sampling error, Section 1.8). Imagine that one sample of rock is dated ten different ways. Nine of the tests yield an age close to 225,000 years. One test yields an age of 3.2 million years. Do the nine consistent results imply that the one that deviates is incorrect, or does the one odd result invalidate the nine that are consistent?One problem in radiocarbon dating of biological samples, especially very old ones, is that they can easily be contaminated with modern biological material during the measurement process. What effect would such contamination have on the estimated age? Why is such contamination a more serious problem for samples of older material than for samples of younger material?A paleontologist estimates that when a particular rock formed, it contained 12 mg of the radioactive isotope potassium-40. The rock now contains 3 mg of potassium-40. The half-life of potassium-40 is 1.3 billion years. From this information, you can conclude that the rock is approximately ______________ billion years old.
- Compare and contrast Relative dating, Absolute dating, and Radiometric dating.Match the reliable age range of the right with the appropriate technique on the left. Thermoluminescence [ Choose] Choose] Ages greater than 1,000 years ago. Ages between 1,000 years ago and 600 kya. Ages greater than 100 kya Ages between 300 BP and 300 kya. Ages between 0- 50 kya. [Choose ] Uranium-Thorium K-Ar (Potassium-Argon) Fission Track [ Choose ] Radiocarbon (14C) [Choose ]A rock sample which originally contained 400 grams of radioactive isotope X now contains 25 grams of the material. The half-life of isotope X is 10,000 years. How old is the rock sample? (Give your answer without any punctuation or lables. For example: 15000).
