1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Bingel [31]
3 years ago
7

Which one of these characteristics is present in land plants and not in Charales?

Biology
1 answer:
SVEN [57.7K]3 years ago
5 0

Answer:

alternation of generations

Explanation:

The expression alternation of generations refers to reproductive cycles that occur in different living organisms, such as those in terrestrial plants, including the occurrence of alternation of generations of terrestrial plants is a characteristic that does not occur in Charales.

The alternation of generations is a phenomenon present in the life cycle of all plants and also in some algae and fungi. This alternation means that during the life of the plant it will go through a haploid phase called the gametophyte, which will alternate with the diploid generation known as the sporophyte. A haploid cell has only one set of chromosomes (n), while a diploid cell has two sets (2n).

You might be interested in
How long does it take for the moon to complete one cycle?
KATRIN_1 [288]
"27 days, 7 hours, and 43 minutes for our Moon to complete one full orbit around Earth"
8 0
3 years ago
Read 2 more answers
alfred hershey and martha chase designed an experiment to determine the chemical makeup of griffith's transforming principle. de
MAXImum [283]

Answer:

Bacteriophages (phages) are viruses that infect only bacteria and do not infect mammalian or plant cells. Phages are ubiquitous in the environment. Phages or bacteriophages were chosen as a model system for their simplicity, as they only contained protein-coated nucleic acid. Alfred D. Hershey and Martha Chase (who were part of the bacteriophage group) in 1952 studying the infection of the bacterium Escherichia coli by the T2 phage show that the information definitely resides in the DNA. They used phage with either [32P] -labeled DNA or [35S] -labeled proteins to infect the bacteria. Immediately afterwards, they centrifuged the sample so that the infected bacteria remain in the pellet and the virus capsids (proteins) remain in the supernatant. [35S] is found in the supernatant, whereas [32P] is found in bacteria. After one cycle of infection, it was observed that when phage labeled in the [35S] proteins were used, only 1% of the radioactivity was incorporated into the progeny. But when phages were [32P] labeled, more than 30% of the radioactivity was in the progeny. They showed directly that what is transmitted from one progeny to another is the DNA and not the proteins, despite having first "diluted" in a bacterium.

Explanation:

Bacteriophages are viruses that infect bacteria in a specific way. Bacteriophages, like other known viruses, are found in an intermediate zone between living organisms and inert matter. Bacteriophages bind to the host pathogenic bacterium, introduce their genetic material, replicate inside it and destroy it. Hersey, along with his assistant Martha Chase, used phages because they knew that T2 phages were made up of 50% proteins and 50% nucleic acids and that phages entered bacteria and reproduced. As the progeny carried the same infection traits, the genetic material of this had to be transmitted to the offspring, but the mechanism was unknown. These scientists carried out an experimental work with the T2 virus, a bacteriophage that infects the bacterium Escherichia coli, which it reproduces by attaching itself to the outer wall of the bacterium, injecting its DNA into it where it replicates and directs the synthesis of the phage's own proteins. Phage DNA is encapsulated within proteins and produces phages, which lyse or disrupt the cell and release phage from progeny. They infected a culture of bacteria with radioactively labeled phages: the protein coat with sulfur (35S) and its DNA with phosphorus (32P). After infection, they separated the phages from the bacteria by violent shaking using a mixer (hence the name of the experiment). By centrifugation the much smaller phages remained in the supernatant and the much larger bacteria in the pellet. 85% of the radioactivity corresponding to DNA appeared in the pellet and 82% of the protein in the supernatant. This result supported the idea that DNA was the only component of the bacteriophage that penetrated the interior of the bacteria and, having the ability to form new phages, constituted the genetic material.

5 0
3 years ago
What is true about DNA mutations?
JulsSmile [24]

Answer:

B

Explanation:

Crossing over is the process involved during meiosis of two chromosomes sharing genetic information with each other from each parent. This happens so the two daughter cells or sister chromatids have a variety of genetic information and so they are not completely identical. This leads to genetic diversity or variation.

6 0
3 years ago
Which two structures would provide a positive identification of a plant cell under a microscope
nydimaria [60]

Answer

D: cell wall, Chloroplast

Explanation:

7 0
3 years ago
What is a thery that has been proven true over time and and never disproven called
DaniilM [7]
That is a scientific Law


8 0
3 years ago
Other questions:
  • What is the electrical charge on the plate that causes the beam to bend toward the plate
    6·2 answers
  • This is the term for the weather patterns that an area experiences over a long period of time?
    10·2 answers
  • Help please!
    6·2 answers
  • Which best describes the blood flowing in a vein?
    7·2 answers
  • The chemical formula for propane is C3H8. The chemical formula for olive oil is C18H34O2.
    9·1 answer
  • What determines whether an allele is dominant recessive or codominant?
    10·1 answer
  • Light requirements of photosynthesis?
    9·1 answer
  • Please comment the answer, fast!!!!
    15·1 answer
  • Someone help me with that question please
    8·1 answer
  • Help me now please for a cookie
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!