Answer:
The correct answer is - Development of simple bacteria→RNA formation→DNA formation
Explanation:
According to the hypothesis and researchers, it seems to confirm that RNA was the first genetic or hereditary material that was present in the simple form of bacteria developed first.
RNA is the molecule responsible for the origin of life on the earth and evolved all the required processes and methods for carrying and expressing the genetic information of an organism before DNA. DNA is evolved from RNA molecules of simple bacteria.
13. If an object travels 42 meters in 6 seconds, what is its average speed? А 6 m/s B 7 m/s C 48 m/s D 252 m/s
Answer:
B) 7 m\s
Explanation:
42 divided by 6 equals 7. Each second is 7 meters.
5 Which word should replace the question mark in the diagram? ? Water droplet Reflection А Refraction B Reflection C Light energy D Rainbow
Answer:
percipitation
Explanation:
I took this class already
You want to identify dominant /recessive relationship for skin color for a new frog species that you found in the rain forest. Assume that one autosomal gene controls skin color in this species. All of the frogs that you found for that spe- cies are bright blue or yellow. A bright blue female and bright blue male frog mate and produce all bright blue progeny. A yellow female and yellow male frog mate and produce a mix of bright blue and yellow progeny. Identify each trait (bright blue skin color and yellow skin color) as dominant or recessive. Explain your choices.
Required:
Identify the genotype for each parent in the two crosses.
Answer:
bright blue trait = recessive
yellow trait = dominant
Explanation:
let the letter B represent the gene for skin colour.
This means that the dominant gene is 'B' while the recessive gene is 'b'
A dominant gene is one that is exhibited phenotypically in the presence of both gene variants (heter0zygous state - Bb) while a recessive gene is only expressed phenotypically when it is in a h0m0zygous state (bb)
In order to find out the genotype of the parents, let us consider each cross one after the other.
1. A bright blue female and a bright blue male produce all blue progeny.
2. A yellow female and a yellow male produce a mix of both bright blue and yellow progeny
From statement 2, it can be deduced that the trait for yellow colour is dominant because a cross of the parents exhibiting this trait produces bright blue offsprings too, meaning that the genetic composition of the parents contains the gene that codes for yellow colour. Since these parents show a yellow colour in a heterozygous state, then the trait for yellow colour is dominant.
Therefore, the genotypes of the parents in each case include:
1. A bright blue female and a bright blue male produce all blue progeny. (bb × bb)
2. A yellow female and a yellow male produce a mix of both bright blue and yellow progeny (Bb × Bb)
The body functions best with a particular set of conditions: an ideal body temperature, blood pressure, blood sugar level, and many other ideal conditions. Which of the following is NOT true regarding homeostasis?
Answer:
what are the answer chocices
Explanation:
Explanation:
where is the answer choice??
D. Explain the relationship between the pulse recorded in the finger and heart muscle contraction ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ E. Which components of the cardiac cycle (atrial systole and diastole, ventricular systole and diastole) are discernible in the pulse tracing? ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Answer:
D. Heart contraction and pulse are connected with one another.
E. Atrial diastole and ventricle diastole.
Explanation:
Heart construction and pulse of an individual are connected as one can hear the pulse every time contraction of the heart is completed. Pulse can be understood by this that it represents the number of the contractions is completed by heart each time.
In the pulse tracing, there are two parts of the heart that are discernible which represents the contraction of the heart that are Atrial diastole and ventricle diastole.
The relationship between the pulse recorded in the finger and heart muscle contraction is that both are connected to each other. But, the analysis and processes are different from one another.
What is Muscle Contraction?
A process leading to shortening and/or development of tension in muscle tissues that means the thin filaments slide over the thick filaments and tension is generated between one another is called Muscle contraction.
The pulse recorded in the finger is a signal for flowing the blood throughout the body, while the process of heart muscle contraction signals for electrical conductivity. Both the functions are connected with each other and acquired by cardiac activities.
The components of the cardiac cycle that are discernible in the pulse tracing are Ventricular systole (contraction) and ventricular diastole (relaxation).
Therefore, both the pulse recorded in the finger and heart muscle contraction interconnected with one another and acquired by cardiac activity.
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What orbits, or revolves, around most planets?
Comets
Moons
Rings
Stars
Answer: Stars
Explanation: The sun is a star.
Answer:
moons orbit around planets.
Explanation:
each planet has a moon or multiple moons that orbit around the individual planets.
Consider the nature-nurture debate. Which of these factors do you believe best explains human development? Why? Make sure to respond to at least one other student’s post. Please be respectful and polite in your responses.
Answer:
there aren't any options, and we can't respond to someone in your class
Explanation:
why parasitic worms do not have elaborate system
Which of the following shows the correct ratio of carbon, hydrogen, and oxygen in a carbohydrate?
A. C6H1206
B. C4H80,
C. C7H2005
D. C5H20010
Answer:
A. C6H12O6
please follow meAnswer:
The answer is A.
Its C6H1206
Explanation:
NEXE
What Is an Ecosystem?
Select the correct answer,
Study the image, and then choose the statement that best describes the image
Explanation:
no statements, an exosystem can thrive on its own with animals and plants that keep it going animals die and go into the ground plants absorb them and grow, fish keep drinking water clean and animals also eat them, carnivores eat the animals and thrive, the sun feeds the plants. herbivores eat the plants and omnivores eat bugs
Answer:
Correct Answer is B - Survival of all species of organisms depends greatly on abiotic factors.
Explanation:
How does cellular respiration directly benefit animals?
how could I summerize the nervous system?
Describe what happens when cells divide uncontrollably?
How does an increase in atmospheric carbon dioxide effect the oceans?
Choose all that apply
-It causes them to dry-up and shrink in size.
-It causes sea levels to rise.
-It causes them to be more acidic.
-it causes them to be warmer.
Explanation:
Definitely global warming is correct because global warming is a slow process, a few degrees in hundreds of years. Moreover, there are multiple sources (causes) responsible for Earth warming. Though the Earth warms up very slowly (incomparably slower than heating a pot of water on the stove, where the heating source is only one), it occurs much faster than thousands of years ago.
An increase in atmospheric carbon dioxide is that the level of carbon dioxide is getting increased and the level of global warming is getting increased.
What is the pollution ?The pollution is the unwanted wastes that are coming out in the nature and the environment such that the level of increasing bad effects of air are increased.
It causes them to dry-up and shrink in size. It is because of the increased temperature that increases most importantly this condition of drying up and all. The sea level is increased when there is increase in water level due to the maximum water melting from glaciers that cause the water to increase in oceans.
Global warming is the intact reason that sounds so relevant to the situation where the condition is like that the increasing water will automatically level up other concerns as well that is because of the green house gases.
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Name three types of gene mutations
Which of the following do plants use for energy?
Answer:
phhotosyntesis
Explanation:
A beetle moving away from a light source is an example of
0 Taxis
0 Imprinting
O Imitation
O Kinesis
Help plis..............
Answer:
the answer has to be C
hope this helps!
Which of the following steps in the water cycle represents a change in the state of
matter?
a. Condensation
b. Evaporation
c. Sublimation
d. All of the above
Suppose all the alleles on on the left and right chromosomes switched places but kept the same order. Would the organism be different? Why or Why not?
Answer:
No
Explanation:
The chromosome will stay the same organism.
The organism would be same in both homogenous and heterogenous chromosome . Therefore, switching the alleles won't change the organism if order is maintained.
What is chromosome and its type ?The thread-like chromosomes that convey the genomic information from cell to cell are formed of protein and a single DNA molecule. Chromosomes are found in the nucleus of cells in both plants and animals, including humans.
An organism is said to be homozygous if it has identical genes on both chromosomes. It is referred to as heterozygous if the organism possesses two distinct alleles of the gene.
Therefore, if the alleles switched places but the order remains same then organism will be same too in case of homologus as well as heterologus chromosome.
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what are some facts of the Marine ecosystem!
Answer:
The Marine Ecosystem is the Largest Ecosystem on Earth
The Marine Ecosystem has the Greatest Biodiversity on Earth
Phytoplankton in the Oceans Provide 50% to 85% of the Oxygen on Earth
Explanation:
There's 3 facts lol
Some cells live for years, while others live for only a few days. Why do some cells get replaced faster than others?
Answer:
Some cells don't divide and last you a life time such as many of those in the central nervous system other cells such as stems called cell populations have their telemeres repeatedly extended by the enzyme telomerase other cells are never replaced and live as long as we do .
I hope this answer might help u
Why does the Pacific Ring of Fire occur where it does?
6. Wave and tidal power are expensive to maintain.
true
false
Answer:
true
Explanation:
Most of the oxygen in the atmosphere is made by algae. Where do most of the algae live?
coastal ocean
deep ocean
ponds
lakes
Most of the oxygen in the atmosphere is made by algae, with coastal oceans housing the majority of algae. Hence the correct option is A.
What is Algae?Algae is defined as a member of a group of primarily aquatic photosynthetic organisms of the Protista kingdom. Algae is described as floating green matter on the surface of a pond, lake, river, still water, moist soil, stones that grow on wet surfaces. Therefore, they can synthesize their own food. They are found in water or in very moist places.
Algae play many important and beneficial roles in freshwater environments producing oxygen and consuming carbon dioxide that act as the base of the aquatic food chain, removing nutrients and pollutants from the water and stabilize sediments. Most of the oxygen in the atmosphere is made by algae, with coastal oceans housing the majority of algae.
Hence the correct option is A.
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The drug chloral hydrate prevents elongation of microtubules. During which stage of the cell cycle would chloral hydrate be most
harmful?
Multiple Choice
M phase
G1
G2
S phase
cytokinesis
Answer: G1 phase
Explanation:
Hope this helps!
19. The causes the water to bulge on either side of earth, resulting in high and low tides.
A. gravity
B. ocean circulation
C. Keppler Effect
D. Mars
the answer is B. also known as ocean circulation
A small group of diploid triangular Sticky Notes were fluttering along the coast of The Mainland. A storm blew in and blew the Sticky Notes to an isolated island that had never previously been inhabited by Sticky Notes. After a few years, the Sticky Note population (though still small) has happily made the new island their home and are visited by an evolutionary biologist. The evolutionary biologist bands the Notes, collects tissue for a genetic analysis, and finds that this isolated population of Notes is not in Hardy-Weinberg equilibrium. Why is this, and what may be the potential long-term significance
Answer:
Because genetic drift (Founder effect) is acting on this population. Not all the Hardy weinberg criteria are accomplished. There are no random matings and populations are finite-sized.
Explanation:
This is a special case of genetic drift: the founder effect.
The “Founder effect” phenomenon refers to cases where a new population originates from a few founder individuals, coming from a bigger ancestral population, that established in a new environment. This small population might or might not be genetically representative of the original one. This subgroup carries with them some genetic information that they share with their original population. Over time, some genes can be lost, or they can increase in frequency. Some rare alleles might be exceeded or might be completely lost. On Consequence, when the small population grows, it will have a genetically different composition from the original one. In these situations, genetic variability is reduced and enhances the possibility of developing a peculiar allelic composition. In some cases, the founder effect is part of the process of speciation.
The criteria for maintaining a Hardy-Weinberg equilibrium are:
Random matings No superposed generations No mutations No migration Infinite population size No natural selectionGenetic drift involved the un-accomplishment of random matings and infinite population sizes.
Genetic drift involves:
limited population sizes individuals reproduce by endogamy/exogamy, and matings occur by phenotype.
Explain how meiosis results in UNIQUE cells.
Meiosis is a reduction division in which the number of chromosomes in the parent cells is halved to the daughter cells.
Meiosis is the process such as:
Meiosis occurs in the reproductive cells of humans. Meiosis transmits genetic information from parent to offspring. Meiosis is the characteristic feature of sexual reproduction. The male and female gamete fuse to give rise to a newly formed combination of the daughter cells.Meiosis results in the recombination of male and female gametes, which results in the independent assortment of the genes.
Thus, meiosis always results in new variations and creates genetic diversity.
To know more about meiosis, refer to the following link:
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Select the correct answer.
Who do we consider to be the founder of genetics?
Answer:
C: Gregor Mandel