Answer: Layered rocks and evolution of life and radiometric time scale based on radioactivity of chemical elements
Explanation:
Two scales are used to date these episodes and to measure the age of the Earth: a relative time scale, based on the sequence of layering of the rocks and the evolution of life, and the radiometric time scale, based on the natural radioactivity of chemical elements in some of the rocks.
The fungus Melampsora lini causes a disease known as flax rust. Different strains of M. lini cause varying degrees of the rust disease. Conversely, different strains of flax are resistant or sensitive to the various varieties of rust. The Bombay variety of flax is resistant to M. lini-strain 22 but sensitive to M. lini-strain 24. A strain of flax called 770B is just the opposite; it is resistant to strain 24 but sensitive to strain 22. When 770B was crossed to Bombay, all F1 individuals were resistant to both strain 22 and strain 24. When F1 individuals were self-fertilized, the following data were obtained:
43 resistant to strain 22 but sensitive to strain 24
9 sensitive to strain 22 and strain 24
32 sensitive to strain 22 but resistant to strain 24
110 resistant to strain 22 and strain 24
Required:
Explain the inheritance pattern for flax resistance and sensitivity to M. lini strains.
Answer:
Explanation:
Using the Mendelian approach to solve this question, we will understand that the mendelian approach has a pattern for inherited traits.
From the data set given, the total number of the population is:
43+9+32+110 = 194
However, their ratio are being calculated as follows:
43/194 = 0.22
9/194 = 0.05
32/194 = 0.16
110/194 = 0.57
After comparison with the Mendelian's approach, we realize that these results seem to be similar to the 9:3:3:1 ratio.
i.e.
3/16 = 0.18
1/16 = 0.06
3/16 = 0.18
9/16 = 0.56
The inheritance pattern obviously dictates that the flax experiment proceeds in the pattern found in the Mendelian's Approach and the resistance of the two different strains were arbitrated by two traits.
Which of the following groups could be classified as an ecosystem?
A)The total of all plants and algae populations in a pond
B)The biotic and abiotic factors interacting in a pond
C)The fungi, bacteria, and animals in a pond
D)The light, temperature, and minerals in a pond
Answer:
The fungi, bacteria, and animals in a pond
Explanation:
Hope this helps :)
Answer:
C) the fungi, bacteria, and animals in a pond
Explanation: Ecosystem: a biological community of interacting organisms and their physical environment:
Lesson 5 Student Activity Sheets: How do bacteria grow?
PREDICTION:
1. If you could zoom in really close to see what was happening on a petri dish, what do you think you
would see?
Answer:I need some points,, I hope y’all can understand
Explanation:
The growth of bacteria can be observed as the bacteria grows very rapidly and fast by the process of asexual reproduction. They continuously multiplied and in very short period of time they divided from one to thousands.
What is asexual reproduction?Asexual reproduction is defined as the process of reproduction in which only a single parent is involved. Reproduction has been defined as the process carried out by the living organisms and during the process of reproduction the living organisms produces their own young ones and feed them. Reproduction is the supreme quality of living things.
There are two types of reproduction and these are sexual and asexual reproduction. The process of reproduction in which two parents are involved is said to be sexual mode of reproduction and the process of reproduction in which only single parent is involved in known as asexual mode of reproduction. The example of asexual reproduction are budding, fragmentation, spore formation, and binary fission.
Therefore, The growth of bacteria can be observed as the bacteria grows very rapidly and fast by the process of asexual reproduction. They continuously multiplied and in very short period of time they divided from one to thousands.
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Aliyah found a tarnished silver dollar and recalled that tarnish results when metals react with oxygen or sulfur compounds in the air. She polished the silver dollar to remove the tarnish until it was shiny again. She also polished a copper bracelet and a gold ring. What physical property of these metals makes them shiny?
Answer:
LUSTER
Explanation:
The physical property of the metals that make them shiny is called Luster. Therefore, Aliyah was able to polish the metals like silver, copper, and gold.
What is luster?Luster is one of the important physical properties of the metals, which refers to the way light is reflected from the surface of the metal. In the context of metal, luster refers to the shininess or brightness of the metal surface.
The luster of a metal ranges from dull to very shiny and can influence the perceived value of the metal as well as its suitability for various applications.
The luster of a metal can be affected by factors such as surface roughness, impurities, and exposure to environmental conditions such as corrosion and oxidation.
The treatment of a metal surface, such as polishing and plating, can also impact the luster of a metal.
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Why subject bio is named as multidimensional subject
Answer:
Explanation:These studies generally explore how insights gained from traditional unidimensional biodiversity research differ from those derived when multidimensional approaches are taken
Laboratory techniques for randomly linking together amino acids typically generate an insoluble polypeptide, yet a naturally occurring polypeptide of the same length is usually soluble. Explain.
Answer:
The answer has been explained below
Explanation:
The polypeptide has a natural selection due to an optimized sequence. It folds properly. At the outside it has hydrophobic residues. Inside it has polar residues. Now the random sequence of the synthetic peptide is going to be unable to give a good direction to a folding process. This will cause aggregation of hydrophobic side chains on various molecules. Bringing about the polypeptides precipitation from solution. Polypeptides that occur naturally have have the same length when they are in aqueous solution because of amino acid side chains that are present and are large with reactive functional groups.
When you feel cold, there are sensors in your skin that tell the brain you need to warm up. The brain sends messages, by way of nerves, to the muscles in your body causing them to contract and relax very quickly resulting in a shiver. The movement of the muscles during a shiver generates heat which can be used to warm up the surrounding tissues. Which characteristic(s) of life is being represented during this action?
A) respond to stimuli
B) maintain homeostasis
C) growth and adaptation
D) respond to stimuli and maintain homeostasis
Which of the following bones are considered to be the MOST proximal?
metatarsals
clavicle
ulna
olecranon
Answer:
Of the group of bones mentioned, the most proximal is the clavicle, which is part of the shoulder girdle.
Explanation:
Proximal is a reference term used in anatomy to indicate the structures that are closest to the center of the body.
The bones mentioned -clavicle, olecranon, ulna and metatarsals- are related to the function of the limbs. The clavicle is the closest bone to them, located between the neck and the thorax, on each side of the midline of the body.
Regarding the other options, other bones are distal, as they move away from the center of the body. In order from less distal to more distal they are found:
Olecranon, which is a bone eminence of the ulna, in the upper limb. Ulna or cubitus, which is part of the bones of the forearm. Metatarsals are the bones that form part of the foot.Compare transitional aquatic ecosystems. Identify two types in the organizer below and describe the environments each type combines. 9th grade Biology
Answer:
The correct answer is -
wetlands - land and water
estuaries - freshwater and salt water
Explanation:
There are three types of aquatic ecosystems that are lentic, lotic, and wetlands. Lentic ecosystems include slow-moving or non-moving water systems like pools, lakes, or ponds. The Lotic system on the other hand is aquatic systems with faster-moving water systems like the ocean or river also known as estuaries.
Wetlands are the system that has unique properties of having vegetation adapted according to the condition or situations on the water in saturated soil flood with water seasonally or permanent.
Aquatic system organizers
wetlands - land and water
estuaries - freshwater and salt water
A local ecosystem includes a variety of grasses that grow on spongy soil. In spring, heavy rainfall and melted snow cover the soil in a few inches
of water. The ecosystem dries up by late summer. What term BEST describes this ecosystem?
A. pond
B. estuary
C. wetland
D. stream bed
Answer:
The correct answer is C. Wetland.
Explanation:
A wetland is a generic name for habitats located between hard ground and open water. Wetlands include, for example, wet and waterlogged shallow land, shallow lakes and seas, marshes, floodplain forests, and flowing waters.
Wetlands provide a breeding ground for many animal and plant species and can act as a buffer in flood areas and prevent severe and sudden floods. Rainfall, waters entering the catchment area, soil and ground elevation differences in the area, and water evaporation form the hydrological conditions of the wetlands. Wetlands are one of the most valuable and endangered habitats on Earth. Swamps, overgrown lakes, flood-prone areas, shallow bays, water-covered beach areas and mangrove beaches are all endangered habitats.
Explain how wildfires help restore soil nutrients to forest ecosystems.
Answer:
Wildfire help restore soil nutrients - Wildfire kills off the soil organisms that consume soil nutrients. Wildfires restore soil nutrients by decreasing the amount of underbrush in forests that contribute to nutrient loss. Wildfires break down organic material faster than decomposition, thus renewing soil nutrients more quickly.
Explanation:
Wildfire help restore soil nutrients by eliminating soil organisms that consume soil nutrients and decomposition of materials that help to renew soil nutrients.
What is soil nutrients?
Soil nutrients are essential ingredients needed by plants for growth, they include nitrogen (N), phosphorus (P) and potassium (K).
Some factor can impact on soil nutrients thereby reducing it.
How wildfire help to restore soil nutrientsWildfire help restore soil nutrients in the following ways;
Decomposition of materials that renew lost soil nutrientsElimination of soil organisms that consume soil nutrients. Reduction of plants that contribute to nutrient loss.Learn more about soil nutrients here: https://brainly.com/question/8901446
Aristotle's ladder of nature, and the Great Chain of Being, were concepts suggesting __________.
a) life evolved on other worlds and was later transported to Earth down a celestial ladder
b) the accurate evolutionary view that all species are related, with each providing an evolutionary link (i.e. step in the ladder) to its immediate ancestor
c) the mystical teleological view that all species were created in a fixed order, from least to most perfect
d) life is a painful and purposeless experience of endless steps, but death brings release from the ladder of life
Answer:
c) the mystical teleological view that all species were created in a fixed order, from least to most perfect
Explanation:
The teleological argument states that God created all living things, this belief is also known as intelligent design or creationism. This belief might be considered to be opposed to the mechanism of natural selection proposed by Darwin to understand how species evolve, which can explain the complexity of living things. The creationism was firstly proposed by Socrates in ancient Greece. Subsequently, Plato (who was a student of Socrates) and Aristotle (who was a student of Plato) substantially enhanced the arguments of the intelligent design.
If a cell does not go through the Sphase of the cell cycle before mitosis, what might be wrong with the daughter cells?
Answer:
Synthesis is the phase of the cell cycle in which DNA is replicated, occurring between G1 phase and G2 phase. Since accurate duplication of the genome is critical to successful cell division, the processes that occur during S-phase are tightly regulated and widely conserved.
Explanation:
If a cell has not properly copied its chromosomes or there is damage to the DNA, the CDK will not activate the S phase cyclin and the cell will not progress to the G2 phase. The cell will remain in S phase until the chromosomes are properly copied, or the cell will undergo programmed cell death.
Each step in the cell division is controlled and regulated by proteins like Cyclins. If a cell does not go through the S phase, it can not go to the G2 phase until the replication process is completed, or until it's programmed cell death.
-----------------------------------------------
As the cell passes through different steps of cell division, there are auto control mechanisms to ensure that the step was correctly performed and the cell is ready to go to the next step.
Many regulator molecules act during the different stages of the mitosis process to make it possible.
There are too many factors interacting, activating, and deactivating to pass from one stage to another.
Cyclins are proteins that regulate the whole cell cycle. There are different types of cycling, each of them acting on a different stage.
When the cell is going through one of the stages, the only cyclin in high levels is the one that is regulating that cycle.
Once that stage is over, that cyclin concentration decreases, and the following one increases.
But if any step was not correctly performed, the cell can not pass to the following one.
During the S stage of the interphase occurs the DNI replication process.
At this point, also occurs the synthesis of histones and other associated proteins.
This is the only stage where the DNI molecule is replicated.
S phase cyclins are in charge of regulating the stage of DNA replication.
If the cell does not go through the S phase, the cyclins of this stage are not activated. And if S phase cyclins are not active, the cell can not go to the G2 phase.
The cell remains in the S phase until the DNA replication process is correctly done. And if it does not occur, the cell suffer programmed cell death.
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I NEED HELP PLEASE PICTURE ABOVE
Plz ASAP What is the male sex cell that results from meiosis?
zygote
sperm
egg
bacteria
Answer:
sperm
Explanation:
Answer:
b. sperm
Explanation: it is what fertilizes the egg (female meiosis cell) to create a zygote.
E2020
Grapes growing on a vine are observed to shrink slightly during the day and increase in size at night. This is because:
a. developing fruits, such as grapes, transpire a lot of water to stay cool.
b. photosynthesis to produce sugar occurs in the light, but respiration and, therefore, the growth of new cells occurs mostly in the dark.
c. in leaves, phloem flow to growing sinks only occurs when the stomata are closed, because the transport capacity of the xylem is too small to supply water for both transpiration and phloem flow.
d. during the day, transpiration pulls on the water in the whole plant, causing the grapes to shrink slightly.
Answer:
b. photosynthesis to produce sugar occurs in the light, but respiration and, therefore, the growth of new cells occurs mostly in the dark.
Explanation:
Photosynthesis is the means by which green plants produce their foods by the use of sunlight, chlorophyll and carbon dioxide.
During the day, the grape make use of the process, photosynthesis, to get its sufficient food, thus the reason for the slight shrink. But at night, it respire well and new cells are produced. So that its size increase a bit.
Which of the followmg statements is true?
A. A technology Society has no impact on the environment
B. A technology society has a completely positive impact on the environment
C. A technology society has both a positive and a negative impact on the environment
D. A technology society has a completely negative impact on the environment
Answer:
C
Explanation:
What does the study of embryology tell us about evolution?
Answer:Embryology, the study of the development of the anatomy of an organism to its adult form, provides evidence for evolution as embryo formation in widely-divergent groups of organisms tends to be conserved. ... Another form of evidence of evolution is the convergence of form in organisms that share similar environments.
Explanation:it will help you with anatpony
HELPP PLEASE!!
What is a subjective claim?
A claim based in personal opinion.
A claim that covers two subjects or topics.
A claim based on verifiable fact.
Answer:
A
Explanation:
its a expression of belief, opinion, or personal preference
How does the movement of water, carbon, and nitrogen in ecosystems differ from the movement of energy?
Please help me this is due today, thank you if you do^^
Answer:
While water, carbon, and nitrogen cycle through the ecosystem, energy flows through an ecosystem.
Explanation:
There is a limited amount of water, carbon, and nitrogen in an ecosystem, and therefore, it cycles and passes through an ecosystem multiple times. In the case of energy, however, it is different. Energy goes into a system, flows from organism to organism, and then leaves the system. For example, with water, that water will rain, gather in a river or body of water, and evaporate, doing the cycle over and over again. Energy from the sun however, gets collected by producers, then flows to the organism that eats the plant, then flows to the organism that eats that organism, and so on. The energy does not return to the sun, it just leaves the system (like for example when an organism dies).
Which products do not have scientific studies supporting their claims to be beneficial when used?
A. Cofactors and coenzymes to support enzyme function
B. Lactase enzymes used in milk sugar digestion
C. Enzyme that aids in the digestion of oligosaccharides
D. Enzymes to promote immune system function
Answer:
B (not sure)
Explanation:
sorry if I'm wrong (which I'm probably). Research more on the internet. Maybe take a look at ur school book
Who is considered to have discovered the electron?
Answer:
J.J. Thompson
Explanation:
Electron was discovered by J. J. Thomson in 1897 when he was studying the properties of cathode ray.
Answer:
J.J Thomson
Explanation:
As. Why do biennial plants need two years to complete
their live Span ?
State which type of fat is harmful to human, and what kind of bonds it has. *
Answer:
saturated fats:single bonds
trans fat: one doubled bond
Why don’t you get the flu when you get a flu shot?
A. You wash your hands to keep from getting the flu
B. Your body makes antibodies to keep flu away
C. Your body makes a pathogen to fight the flu
D. Your body makes a natural immunity for the flu
The enzyme catalase is important to many organisms. This enzyme convertshydrogen peroxide, which can be toxic to cells,to oxygen and water. The optimum pH at which it functions is 7.0. If the pH changes too much in either direction. the function of catalase decreases. Which is TRUE about catalase ?
Catalase is a nucleic acid.
catalase is affected by pH as it is a protein.
Catalase can vaporize at room temperature.
Catalase is a carbohydrate
Answer:
yes
Explanation:
catalase is a carbohydrate
7. What is the speed of the sound in air of 250 C temperatures
A. 336m/s B.325m/s
C.346m/s
D.355m/s
8. Calculate the speed of sound if the temperature of the vibrating water is28-
A.346m/s
B.347.8m/s
C. 350m/s
D.349.1m/s
9. An echo occurs when sound
A. is trarismitted through a surface
B. is reflected from a distant surface.
C. changes speed when it strikes a distant surface.
D. all the above
10. The change in direction of a sound wave around corners is called
A. diffraction B. interference
C. refraction
D. reflection
11. You can hear noises a long distance away over water at night because
A. of lowered temperature. B. water conducts sound better at night. C. Sound is reflected off water more e
night. D. Of refraction of sound in air.
12. What is the BEST reason why a lot of people love to sing inside the bathroom?
A. because of privacy
B. because the bathroom creates an aurally pleasing acoustic environment
C. because of resonance
D. because the small dimension of the bathroom makes someone comfortable
13. The technique used by bats to find their way or to locate food is
B. RADAR
C.ECHOLOCATION
D. FLAPPING
A. SONAR
14. What kind of wave is sound wave?
A. shock wave.
B. standing wave.
C. transverse wave.
D.longitudinal wave.
15. When does resonance occur?
A. when objects of different natural frequencies are forced to produce vibration
B. when objects vibrate
C. when sound is reflected
D. when one object vibrates at the same natural frequency of a second object
Answer:
i think is c
Explanation:
Which is the correct ratio of Carbon Hydrogen Oxygen found in a carbohydrate? 2:21 1:1:2 0212 121
Answer:
1:2:1
Explanation:
The ratio of carbon to hydrogen to oxygen in carbohydrate molecules is 1:2:1.
Answer:
1:2:1
Explanation:
carbohydrates have a general formular of C6H12O6.
divide all through by a common factor(I.e 6)
1:2:1
If two fruit flies, heterozygous for a gene that codes for eye color , were bred together and had 200 offspring , about how many would have the dominant phenotype
Answer:
75%
Explanation:
Assuming that eye color follows mendellian inheritance, two heterozygous parents would breed as follows:
Ee x Ee
Punnett sqaure
E e
E EE Ee
e Ee ee
All organisms possessing allele E will express dominant phenotype.
From two fruit flies, 75% would have the dominant phenotype.
What do you mean by phenotype?The phenotype is the set of observable characteristics or traits of an organism. The term covers the organism's morphology or physical form and structure, its developmental processes.
Phenotype refers to an individual's observable traits, such as height, eye color and blood type. A person's phenotype is determined by both their genomic makeup (genotype) and environmental factors.
Examples of phenotypes include height, wing length, and hair color. Phenotypes also include observable characteristics that can be measured in the laboratory, such as levels of hormones or blood cells.
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what is the scientific name for powdered pepper
Answer:
Capsicum
or
Tracheophyte
Explanation:
The scientific name of powdered pepper is Capsicum annuum . For a pepper plant to grow , it takes approximately 3 to 4 years . These pepper are very useful to us for many purposes . They help in good digestion of food whenever a person is going through ingestion .