The table in Figure 12–3 shows the results of measuring the percentages of the four bases in the DNA of several different organisms. Some of the values are missing from the table. Based on Chargaff’s rule, the percentages of thymine bases in chicken DNA should be aroundA. 28.8%.
B. 19.9%.
C. 21.5%.
D. 13.4%.


Answer 1
Answer: The correct answer to this question is letter "B. 19.9%. "

There exists a question on a separate site that shows that table.
The table in Figure 12–3 shows the results of measuring the percentages of the four bases in the DNA of several different organisms. Some of the values are missing from the table. Based on Chargaff’s rule, the percentages of thymine bases in chicken DNA should be around 19.9%

Related Questions

Question 1 (1 point)Which sequence best orders ecological categories from the one with the fewest number of individuals to the one with the greatest number ofindividuals?OOOOecosystem, population, community, biomebiome, population, community, ecosystempopulation, community, ecosystem, biomecommunity, biome, population, ecosystem
How do organisms get energy in an ecosystem? Be sure to address both producers and consumers. *​
Help me please , easy 10 points ... just look at the picture & answer the question.
What determines the physical and chemical properties of a mineral?
Which of the following is a fomite?a. a prairie dog infested with fleas infected with the plaue bacteriumb. a river contaminated with the Giardia protozoanc. a doorknob contaminated with the cold virusd. an asymptomatic person infected with HIVe. a mosquito infected with the malaria protozoan

what microorganisms have been used to make marmite? what microorganisms have been used to make bun? what microorganisms have been used to make cheese? what microorganisms have been used to make beer? what microorganisms have been used to make vinegar? what microorganisms have been used to make malt vinegar?



It is produced industrially by fermentation using yeast or bacteria. Marmite's defining ingredient is made from brewer's yeast heated to create glutamic acid, which is used by farmers to increase plant growth and boost crop yields.

6 steps of translation in order biology



step 1: mRNA attaches to the ribosome

step 2: tRNA's attach to free amino acids in the cytoplasmic "pool" of amino acids

step 3: tRNA carries its specific amino acid to the ribosome

step 4: tRNA "delivers" its amino acid based on complementary pairing of a triplet code (anticodon) with the triplet code (codon) of the mRNA

step 5: Enzyme "hooks" the amino acid to the last one in the chain forming a peptide bond

step 6: Protein chain continues to grow as each tRNA brings in its amino acid and adds it to the chain

Final answer:

Translation in biology involves converting the mRNA transcript, which comes from DNA, into a protein through six stages: Initiation, tRNA elongation, amino acid bonding, mRNA shift & release, arrival of the next tRNA, and termination with a 'stop' codon.


In biology, the process of translation converts the sequence of codons in mRNA, obtained from DNA transcription, into an amino acid chain or a protein. This process occurs in six primary steps:

  1. Initiation: The ribosome binds to the mRNA transcript.
  2. Elongation: tRNA anticodon recognizes the next mRNA codon in the sequence, allowing the tRNA to present its amino acid.
  3. Amino Acids Bonding: With the help of enzymes and energy, the growing polypeptide chain attaches to the amino acid presented by tRNA.
  4. Shift & Release: The tRNA molecule then lets go of the mRNA strand, and the mRNA strand shifts one codon over in the ribosome.
  5. Next tRNA Arrival: The next tRNA arrives with its matching anticodon.
  6. Termination: A 'stop' codon on the mRNA triggers termination, initiating the release of the new protein.

Learn more about Translation Steps in Biology here:


NEED HELP QUICK!!!1). The Miconia plant is not a native plant to Hawaii. Since its introduction into Hawaii 40 years ago, it has become a popular decorative plant. However, this shallow-rooted plant has replaced many of the native deep-rooted plant species and increased the likelihood of landslides on the island. Which is one of the BEST methods of dealing with this invasive plant?

A) The plant should be shared with the smaller islands.

B) The plant should be fed to the native livestock on the island.

C) The plant should be uprooted from all regions in the island.

D) The plant should be cross-bred with deeper-rooted plants.

2). In the Everglades, a system of canals and levees diverts water to urban areas and the Everglades National Park. This water management system has caused changes in the natural flow of the water during the wet and dry season. Wading birds are especially sensitive to wet and dry seasonal changes. How have water cycle disruptions MOST likely affected wading birds?

A) The reduced salinity results in more eggs being laid.

B) The water quality for feeding has been improved by runoff.

C) The release of water dilutes food sources for their young.

D) The higher water levels allow longer-legged birds to survive and reproduce.

3). In Florida, humans have caused more than 2,000 manatee deaths since 1974. Collisions with boats and boat propellers cause roughly twenty-five percent of all manatee deaths. Another significant cause of the declining population is the disappearance of manatee habitats, resulting primarily from coastal development, water quality problems, and the change in water levels caused by Florida’s flood control systems. A constitutional amendment has been proposed that would protect natural systems and biological diversity. Which would be the MOST likely requirement of a constitutional amendment to protect the manatee population?

A) moving manatees to locations outside of the Everglades

B) restricting manatee hunting in the Everglades to certain times of year

C) raising more manatees in captivity

D) placing a limit on speedboat use in manatee habitats


The BEST method of dealing with the invasive Miconia plant would be to uproot it from all regions of the island (Option C). Water cycle disruptions have most likely affected wading birds by diluting food sources for their young (Option C). The most likely requirement of a constitutional amendment to protect the manatee population would be to place a limit on speedboat use in manatee habitat (Option D).

What is an invasive species?

The invasive Miconia plant is a threat to the native plant species and ecosystem of Hawaii. The plant grows rapidly and has shallow roots, which can cause soil erosion and increase the likelihood of landslides. Sharing the plant with smaller islands or cross-breeding it with deeper-rooted plants may seem like viable solutions, but it is essential to understand that the plant is already invasive and has caused significant harm to the ecosystem. Removing the plant completely is necessary to allow the natural ecosystem to recover and prevent further damage.

Hence, for first question the correct answer is Option C, for second correct answer is Option C, Option D is correct for third question.

Learn more about the  invasive species here


1) D because even if you rip all them out, the seeds of the plant are still in the ground
2) D because of the current, short-legged birds might get swept away
3) D because all of the other options would most likely not enforced.

Cells that do not have a true nucleus are called _____?





The pedigree below tracks a genetic abnormality through five generations of a family tree. The trait, polydactyly, is characterized by extra fingers (left), toes, or both. The pedigree shows the number of fingers on each hand in black; toes on each foot, in red. male female unknown gender marriage/mating individual with the trait being studied I, II, III, IV... generation offspring Standard symbols used in pedigrees. 1 II *Gene not expressed in this carrier. III IV V (a) Using the pedigree, describe the genotypes of the parents for the trait polydactyly in generation I. (b) (6) Explain how humans are able to produce gametes that are haploid. (c) According to the pedigree, explain the inheritance pattern of the genetic abnormality polydactyly.


Pedigree charts are used to trace the passing out of traits(characteristics) through generations.

In the given pedigree of 5 generations, the pattern of inheritance of genetic abnormality of polydactyly(extra fingers in hands and toes) is studied . The types of pattern of inheritance in traits over generations.

(a) Genotype of the parents for the trait Polydactyly in generation 1

Since each parent provide one allele of each trait to the offspring there are dominant and recessive genes on the basis of the expression of the character or trait. The genotype of the parents for thre trait of polydactyly in generation 1 is Recessive. Because both the parents do not have the abnormality and their offspring shows(expresses) the trait.

(b) In humans there are 46 chromosomes arranged as 23 sets of 2 chromosomes in a cell which is described as (2n). These somatic cells undergo Mitotic division to produce 2 identical daughter cell with 2n chromosomes and they are called diploid cells. When Meiosis takes place one cell is divide into 4 Haploid cells with 23 chromosomes each, ie, the single set of chromosomes represented by n. These Haploid cells are the gamates which transfer the genetic information from parents to offspring. The gamates are 2 types the sperm and egg cells , both are haploid and during fertilization a sperm cell fuses with eggcell to form a zygote with 2n (46) chromosomes.

To learn more about chromosomes check the link below:


Help please! A bee lands on a flower to collect nectar needed to make food. Pollen from the flower sticks to the bee's body. The bee then flies to another flower to collect more nectar. While there, the pollen from the first flower rubs off, pollinating the plant. This allows the plant to reproduce. Which type of symbiotic relationship does this represent?


the relationship is MUTUALISM