Answer:
B
Explanation:
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Why does soil lose its fertility from time to time?
Answer:
The soil losses its fertility when we grow many crops again and again on it as the consume all the nutrients present there. it can be restored by growing legumes in the soil or leave it barren for some months
Soil loses its fertility or when topsoil is lost due to erosion. ... The cotton took all the nutrients from the soil, and the nutrients were not replaced. Loss of Topsoil: Wherever soil is exposed, wind and water can erode it. Plants can cover and protect the soil in many ways.
Where do lizards get their tail length
Explanation: long-tailed helps a lizard with balance. It provides a fat reserve for the lizard in times of starvation. A lizard uses its tail to communicate its feelings and its social status. Lizards detach their tails as a defense mechanism.
In a unique species of plants, flowers may be yellow, blue, red, or mauve. All colors may be true-breeding. If plants with blue flowers are crossed to red-flowered plants, all F1 plants have yellow flowers. When these produced an F2 generation, the following ratio was observed: 9/16 yellow, 3/16 blue, 3/16 red, and 1/16 mauve. Determine the F1 results of a cross between true-breeding red and true-breeding mauve flowered plants.
Answer:
F1) 100% bbRr, red flowered plants.
Explanation:
Available data:
flowers may be yellow, blue, red, or mauvecolors may be true-breedingthe cross of blue-flowered plants with red-flowered plants, produce plants that have yellow flowersF2 generation: 9/16 yellow, 3/16 blue, 3/16 red, and 1/16 mauve.Knowing that the phenotypic ratio is 9:3:3:1, we can assume that there are two genes involved in the flower color expression. We can name these genes B and R with a dominant and a recessive allele each (B, b and R, r respectively).
According to the first cross, we might establish the following genotypes:
1st Cross: blue-flowered plant x red-flowered plant
Parentals) BBrr x bbRR
Gametes) Br, Br, Br, Br bR, bR, bR, bR
F1) 100% BbRr, yellow plants
Parentals) BbRr x BbRr
Gametes) BR, Br, bR, br
BR, Br, bR, br
Punnett square) BR Br bR br
BR BBRR BBRr BbRR BbRr
Br BBRr BBrr BbRr Bbrr
bR BbRR BbRr bbRR bbRr
br BbRr Bbrr bbRr bbrr
F2) 9/16 yellow ---> 1/16 BBRR + 2/16 BBRr + 4/16 BbRr + 2/16 BbRR
3/16 blue ------> 1/16 BBrr + 2/16 Bbrr
3/16 red---------> 1/16 bbRR + 2/16 bbRr
1/16 mauve ----> 1/16 bbrr
So,
Yellow-flowered plants: BBRR, BBRr, BbRR, BbRrRed-flowered plants: bbRR, bbRrBlue-flowered plants: BBrr, BbrrMauve-flowered plants: bbrrAccording to these genotypes, the second cross would be like following,
2nd Cross: true-breeding red-flowered plants with true-breeding mauve flowered plants.
Parentals) bbRR x bbrr
Phenotype) Red Mauve
Gametes) bR, bR, bR, bR br, br, br, br
Punnett square) bR bR bR bR
br bbRr bbRr bbRr bbRr
br bbRr bbRr bbRr bbRr
br bbRr bbRr bbRr bbRr
br bbRr bbRr bbRr bbRr
F1) 100% bbRr, red flowered plants.
Which scientific area has the most influence in shaping modern classification methods?
Answer: The answer is " evolution". Evolution is a major force in shaping modern classification methods. Evolution is the adjustment in the qualities of an animal categories more than a few ages and depends on the procedure of common determination.
The scientific field which has had the greatest influence on shaping modern classification methods is Evolution.
What is Evolution?Evolution is concerned with the sequence of changes which occur in organisms as they transform from their ancient forms to their modern forms.
It is the change in the genetic characteristics of a biological population over successive generations. These characteristics are manifestations of genes passed from parents to offspring during reproduction.
The three main types of Evolution are:
1. Divergent Evolution
2. Convergent Evolution
3. Parallel Evolution
Thus, the scientific field which has had the greatest influence on shaping modern classification methods is Evolution.
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Carbon dioxide water and energy are the typical products of the breakdown of which type of molecule
Answer:
the answer is Glucose
Explanation:
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Answer:
Carbon dioxide water and energy are the typical products of the breakdown of which type of molecules Is A carbohydrates and C-lipid
During mitosis, micro tubes attach to chromosomes at the ____
An mRNA that is readily transported into cytoplasm should have all of the following
EXCEPT
a. exons
b. a poly-A tail
c. a 5’-cap
d. introns
Explanation:
In eukaryotic cells, pre-mRNA has to undergo 3 stages of RNA processing before being transported into the cytosol. Specifically during RNA Splicing, small nuclear RNAs (snRNAs), small nuclear ribonucleoproteins (snRNPs) and other proteins form a spliceosome which excises introns and splice together exons. Introns are considered junk material and does not stay with the mRNA.
The answer is Introns. (D)
Answer:
d. introns
Explanation:
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Which sequence best describes asexual reproduction?
A. 1 parent cell - 2 genetically identical offspring cells
B. 1 parent cell - 4 genetically different offspring cells
C. 2 parent cells 4 genetically identical offspring cells
D. 2 parent cells - 1 offspring cell with a combination of genes from its parents
Answer:
A
Explanation:
1 parent cell - 2 genetically identical offspring cells
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Cynobacteria is an example of a ________________________
A. Eukaryote
B. Prokaryote
C. Multicellular organism
D. A cell with a nucleus
Which body system is responsible for storage in animals?
Hope it will help you...
Two substances, both solids, start at the same temperature. You transfer the same amount of energy
into both solids, but substance 1 becomes a liquid before substance 2. Based on this evidence, which
substance has a stronger molecular attraction?
Substance 1
Substance 2
PLS HELP
What events in sexual reproduction contribute to genetic variation in a population that contributed to evolution
of the species on our planet? Explain.
Answer:
Meiosis is the first step in sexual reproduction during which crossing over and recombination develops new combinations of genes on chromosomes. When gametes are produced they under go random fertilization and offsprings with great genetic variations are produced.
This leads to evolution of species on the planet.
Explanation:
Which body sense (choose only 1) do you think is most important? Explain why and provide at least 2 examples. (Your essay must be 1-2 paragraphs).
Answer:
I believe sight is the most important body sense. Our eyes are able to protect us from danger and allows us to complete many day to day functions. Without our sight, we could be much more easily placed into harms way. Our eyes take over to ensure we are prepared for anything we may encounter.
Explanation:
what rules or restrictions do you think should govern constructions in areas with a high risk of erosion?
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Certain fungi can fight or cause disease.
Question 9 options:
True
False
Answer:
true
Explanation:
HELPPP
A vertebrate depends on a variety of body systems, including the nervous, respiratory, digestive, circulatory,
skeletal, and muscular systems. Which statement BEST describes the relationships among the systems?
A )Each system works independently, but may sometimes complete tasks that generally are performed
by another system
B)Each system works independently and depends only minimally on other systems.
C )Each system typically works together with other systems, but sometimes functions independently.
D) Each system works closely with other systems, and could never function independently.
Answer:
D a system could never work independently they all are dependent on each other to peform its given function
When a stimulus reaches the threshold..........in the plasma membrane open.
Sodium bannel
led ne channel
Potassium channel
Calsam channel
Answer and I will give you brainiliest
Answer:
Sodium channel
my answer
describe in detail Alfred Wegener's idea of continental drift
HELPP
Answer:
Continental drift was a theory that explained how continents shift position on Earth's surface. Set forth in 1912 by Alfred Wegener, a geophysicist and meteorologist, continental drift also explained why look-alike animal and plant fossils, and similar rock formations, are found on different continents.
Explanation:
what is the purpose of the article The Amazing World Inside a Human Cell
The larvae of frogs are called ___________.
tadpoles
toadstools
pups
hatchlings
Answer:
tadpole
Explanation:
The larva of a frog is referred to as a tadpole, and they look similar to small fish. Tadpoles have small gills and a tail, along with a mouth. Tadpoles don’t tend to move around much at first, staying stationary for the first couple weeks after hatching.
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24. Natural selection (1 point)
A is directionless
B is random
C guides evolution
D does not exist
Answer:
c
Explanation:
Complex chemical processes such as photosynthesis occur in a controlled series of steps with the help of
A. enzymes
B. nucleic acids
C. phospholipids
D. fatty acids
Which sentence should be added to the introductory paragraph at the point
indicated to best provide background information about the topic?
What happens when a dentist and a candymaker meet? Together,
William Morrison, a dentist, and John C. Wharton, a handymaker,
invented the modern version of cotton candy, a treat popular with both
the young and old. The two sold their cotton candy at the Paris
Exposition in 1900 and the St. Louis World's Fair in 1904 for 25¢ a box,
and the rest is history. The fascinating story of how cotton candy
found its place in American culture is as sweet as the treat itself.
Explain how the ocean affects human life through medicine, nutrition and the economy?
Answer:
Cures from the Deep
Explanation:
Many new marine-based drugs have already been discovered that treat some types of cancer, antibiotic resistant staph infections, pain, asthma, and inflammation.
if the skeletal muscle cells in your leg are performing lactic acid fermentation to produce the necessary ATP for their proper functioning, decribe what is happening to the O2 gas you are breathing
Answer:
The O2 gas in uses in Aerobic Respiration and That O2 is performing that process to make ATP for your body and making glucose to function your body
Explanation:
Lactic Acid Fermentation is Anaerobic Respiration which doesn't Involve Oxygen
Sorry if I'm wrong
Hope this helps!
One trait not typically associated with a bureaucracy is _____.
flexibility
multiple forms
red tape
multi-tiered decision-making
Answer:
flexibility
Explanation:
I hope this helps!
Clear-winged dragonflies live longer and can reproduce
many more times than yellow-winged dragonflies.
How is this population of dragonflies most likely to change as a result of this
difference?
Answer:
Yellow-winged dragonflies will most likely decrease and eventually die out on account of being easily spotted by predators.
Answer: Clear-winged dragonflies will become more common over time.
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Question 3
The skeleton of an animal provides support. What plant part serves a similar function?
Roots
Flower
Leaves
Stem
Answer:
The Stem
Explanation:
The stem because that's where its nutrients comes from and that's the body of a plant.
Answer:
stem
Explanation:
What does the ratio 3:1 mean?
Pls answer
Answer:
ratio of 3:1 means that there are 4 parts altogether. The fractions from the ratio can therefore be deduced as. 34and14. These represent the percentages: 75%:25%
Genetics: A geneticist is studying two genes. Each gene can be either dominant or recessive. A sample of individuals is categorized as follows. Write your answer as a fraction or a decimal, rounded to four decimal places. Gene Dominant Recessive Gene Dominant Recessive (a) What is the probability that in a randomly sampled individual, gene is recessive
Complete question:
A geneticist is studying two genes. each gene can be either dominant or recessive. a sample of 100 individuals is categorized as follows.
gene 2
dominant recessive
gene 1
dominant 56 24
recessive 14 6
(a) what is the probability that a random sampled individual, gene 1 is dominant
(b) what is the probability that a random sampled individual, gene 2 is dominant
(c) given that gene 1 is dominant, what is the probability that gene 2 is dominant
Answer:
(a) what is the probability that a randomly sampled individual, gene 1 is dominant ---> 80%
(b) what is the probability that a randomly sampled individual, gene 2 is dominant ----> 70%
(c) given that gene 1 is dominant, what is the probability that gene 2 is dominant ----> 70%
Explanation:
Due to technical problems, you will find the complete question, the answer, and the explanation in the attached files.