BIOLOGY HIGH SCHOOL

Which kingdom is known to contain organisms that have cells with no cell walls?

Answers

Answer 1
Answer: The answer is that the Animal kingdom's organisms have cells with no cell walls. The cell wall of Prokaryotes is murein, the cell wall of some Protoctists is polysaccharide, the cell wall of Fungi is chitin, the cell wlall of plants is cellulose, and the cells of animals do not have cell walls.
Answer 2
Answer:

Final answer:

The kingdom Animalia, which belongs to the Eukarya domain, is known for having organisms with cells that do not have cell walls. Other kingdoms, like Plantae and Fungi, typically have cell walls.

Explanation:

The kingdom known for containing organisms with cells that lack cell walls is the Animalia kingdom which exists within the Eukarya domain. In the classification of life, three main domains exist: Bacteria, Archaea, and Eukarya. The first two mainly include prokaryotic organisms which usually have cell walls. The Eukarya domain includes four kingdoms: Animalia, Plantae, Fungi, and Protista. Among these, it's typical for Plantae and Fungi to exhibit cell walls. Conversely, Animalia comprised of animals, do not have cell walls surrounding their cells. Their cells are surrounded by a plasma membrane which offers flexibility and aids in movement and interaction with the environment. This characteristic is one of the key distinguishers of the Animalia kingdom from other kingdoms.

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How would the DNA sequence AATCGA be transcribed to mRNA? A. TTAGCT B. TTUGCT C. UUACGU D. UUAGCU

Answers

you should know that A is always with T and C is always with G so the answer is:
A. TTAGCT :)))
i hope this is helpful 
have a nice day 

The atmosphere of Earth contains primarily which gas?A.) Carbon dioxide
B.) Methane
C.) Oxygen
D.) Nitrogen

Answers

The atmosphere of Earth contains primarily nitrogen, 78.09% of nitrogen, 20.95% oxygen, 0.93% argon, 0.039% carbon dioxide, and small amounts of other gases. 

Answer:d

Explanation:test

How are waste products in the blood removed from the body?

Answers

White blood cells remove these objects from the blood stream. Testosterone also helps remove any wastes in the blood stream

What steps are considered when constructing a recombination map using a three-point test cross?

Answers

Constructing a recombination map using a three-point test cross is a fundamental process in genetic mapping to determine the order and relative distances between three linked genes. Here are the general steps involved in this process:

1. **Select Appropriate Organism**: Begin by selecting an organism with traits controlled by three genes that you want to map. Ensure that these genes are located on the same chromosome.

2. **Create a Heterozygous Individual**: Start with an individual that is heterozygous for all three genes of interest (AaBbCc, for example). One chromosome should carry the dominant allele, and the other should carry the recessive allele.

3. **Perform Test Cross**: Cross this heterozygous individual with a homozygous recessive individual (aabbcc). This will produce progeny with a variety of allele combinations.

4. **Observe Progeny Phenotypes**: Examine the phenotypes of the progeny resulting from the test cross. Record the number of individuals with each phenotype. These phenotypes are crucial for calculating recombination frequencies.

5. **Calculate Recombination Frequencies**: Use the phenotypic data to calculate recombination frequencies between the three genes. Recombination frequency is the proportion of offspring that show a recombination of alleles (different from the parental combination).

6. **Determine Gene Order**: Analyze the recombination frequencies to determine the order of the three genes on the chromosome. The gene with the highest recombination frequency with the others is likely to be in the middle, while those with lower recombination frequencies are on the ends.

7. **Calculate Map Distances**: Calculate map distances between the genes based on the recombination frequencies. One map unit (centimorgan) corresponds to a 1% recombination frequency.

8. **Interpolate Cross-Over Frequencies**: If the recombination frequencies are not whole numbers, interpolate to estimate the exact cross-over frequencies between genes.

9. **Create a Recombination Map**: Construct a genetic map that shows the order and relative distances between the three genes. Include map distances in centimorgans.

10. **Validate the Map**: Perform statistical tests or additional crosses to validate the accuracy of the map.

These steps help geneticists create a recombination map, which provides valuable information about the genetic linkage and the physical arrangement of genes on a chromosome.

Select all that apply. How does mitosis in animal cells differ from mitosis in higher plant cells? Plant cells maintain chromosomal integrity throughout the process. Plant cells divide by means of a cell plate. Animal cells undergo furrowing. Animal cells produce four daughter cells.

Answers

The answers are:
- Plant cells divide by means of a cell plate.
- Animal cells undergo furrowing. 

The main difference between mitosis in animal cells and mitosis in higher plant cells is in cytokinesis. In animal cells, membrane forms around each set of chromosomes on two opposite sides of the cells and cells divide into two identical daughter cells. Animal cells undergo furrowing. 
In plants cells, however, the cell walls prevent complete separation of the cells so cells must divide by means of a cell plate.

Final answer:

Mitosis in animal and plant cells end differently; with furrowing in animal cells and the formation of a cell plate in plant cells. Plant cells also maintain chromosomal integrity throughout the process.

Explanation:

Mitosis in animal cells and plant cells have a different conclusion. In animal cells, cytokinesis occurs through a process called furrowing, where the cytoplasm is pinched into two. On the other hand, plant cells undergo cytokinesis through the formation of a cell plate which eventually develops into a cell wall separating the two daughter cells. Also, unlike animal cells, plant cells maintain chromosomal integrity throughout the process.

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Electromagnetic energy can be defined as which of the following?A. the frequency of the emission spectrum

B. the waves of the electromagnetic spectrum

C. energy that moves as particles at the speed of light

D. energy that moves as a wave at the speed of light

Answers

The right answer for the question that is being asked and shown above is that: "C. energy that moves as particles at the speed of light." Electromagnetic energy can be defined as the energy that moves as particles at the speed of light.

Electromagnetic energy can be defined as: C. energy that moves as particles at the speed of light.

What is electromagnetic energy?

Electromagnetic energy can be defined as form of energy that is primarily carried by electromagnetic waves such as gamma rays and x-rays.

This ultimately implies that, electromagnetic energy refers to a form of energy that moves as particles at the speed of light, which is about three hundred million meters per seconds.

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