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
swat32
3 years ago
12

List 4 possible methods for sterilizing ballast.

Biology
1 answer:
iogann1982 [59]3 years ago
4 0
Popular approaches in sterilizing ballast tanks are:
1) filtration and high pressure chambers
2) through UV light or heat treatments
3) removal of oxygen from ballast water (asphyxiation)
4) Use of biocides or chemical treatments
You might be interested in
There are little birds that spend a great deal of time on the back of a rhinoceros and eat the blood sucking ticks out of the rh
Alecsey [184]

Answer: Mutualism

Explanation:

Mutualism is a symbiotic relationship in which both interacting species receives the benefit for togetherness.

In the given situation, the birds are receiving food in the form of ticks and the rhinoceros are receiving protection against the predatory blood sucking ticks.

4 0
3 years ago
Which best describes one way a large body of water such as an ocean influences climate? A. Rushing water from tides cools the la
mojhsa [17]

The correct option is C.

An ocean is a very important abiotic factor in any environment and it have impacts on the climate of the environments where it is found. The ocean currents are driven by the global wind system, which is powered by the energy of the sun. These currents transfer heat to the polar regions from the tropics and brings about the cooling of their environment, thus giving rise to cool climate.



6 0
3 years ago
Read 2 more answers
Which of the following best explains how the expression of a eukaryotic gene encoding a protein wil differ if the gene is expres
Ivan

Answer: c. The protein will be made but will not function, because prokaryotes cannot remove introns.

Explanation:

Eukaryotic cells are cells that have membrane-surrounded organelles, such as a nucleus which is an organelle that stores the DNA, the genetic material. On the other hand, prokaryotic cells do not have a nucleus, and the genetic material is a single molecule, usually circular and closed and double-stranded, which is located in a sector of the cell known as the nucleoid (meaning "similar to the nucleus"), which does not imply the presence of a nuclear membrane.

<u>A gene is a unit of information at a DNA locus that codes for a protein. To synthesize that protein, DNA must be transcribed into messenger RNA (mRNA), and that mRNA is read by ribosomes in a process called translation or protein synthesis</u>. The difference between protein synthesis in prokaryotic and eukaryotic cells is that in prokaryotes, transcription and translation take place directly in the cytoplasm since there is no nucleus. In eukaryotes, transcription takes place inside the nucleus, to generate mRNA. This mRNA molecule is then directed to the cytoplasm where translation happens.

a. In prokaryotic cells, ribosomes are produced in the cytoplasm, whereas in eukaryotic cells they are generated in the nucleolus within the cell nucleus. So they both have ribosomes and they are used to make proteins, then this option is true.

b. RNA polymerase initiates transcription of all different types of RNA (mRNa, ribosomal RNA and transfer RNA). However, there are three RNA polymerase variations, each one translate a different type of gene. But, prokaryotic RNA polymerase can translate eukaryotic genes. Then this option is not true.

c. Prokaryotic cells don't  have introns because those cells do not perform a post-transcriptional RNA modifications, only done by eukaryotic cells. One of the modifications is the excision of introns in RNA. An intron is a region of DNA that is part of the primary RNA transcript, but unlike exons, they are removed from the mature transcript prior to translation. <u>So, this remotion does not happen in prokaryotes because they just don't have introns</u>. Also, in prokaryotic cells. the translation and transcription machinery is coupled. So, the transcription and translation occurs simultaneously, there will be no remotion of introns then the protein will be synthesized differently, since the reading frame is changed. Remember that each codon (set of three nucleotides) codes for an amino acid. So if the gene sequence is different because certain sections of the gene have not been removed, the protein will be different, and probably it will not function. This option explains how the expression of an eukaryotic gene encoding a protein will differ if the gene is expressed in prokaryotic cells.

d. The genetic code is the set of rules that defines how a sequence of nucleotides in RNA is translated into a sequence of amino acids in a protein. This code is common to all living organisms, although there are small variations, and it has a unique origin and is universal.  So, the code defines the relationship between each sequence of three nucleotides, called a codon, and each amino acid.  The sequence of genetic material is composed of four distinct nitrogenous bases, which are represented by letters in the genetic code:

  • Adenine (A)
  • Thymine (T)
  • Guanine (G)
  • Cytosine (C)
  • Uracil (U), only in RNA (instead of T)

So, the genetic code is the same for eukaryotes and prokaryotes. So this option is not true.

7 0
3 years ago
Which of the following does NOT describe the macronucleus of a paramecium?
ololo11 [35]
D. The macronucleus does not disintegrate during conjugation.

The macronucleus contains the working copies of genes needed to support an enormous cell. It is formed by a division of the fused diploid nucleus after conjugation followed by multiple rounds of internal gene replication which does not occurs in the micronucleus.
6 0
3 years ago
Imagine that a plant cell has a damaged large central vacuole that is not functioning. which statement best describes how damage
Serjik [45]

Answer:

The correct answer is D

Explanation:

The primary function of the large central vacuole in a plant cell is to maintain turgor pressure against the cell wall of the plant. This vacuole also perform other functions such as storage (water and other nutrients) and waste disposal. When this vacuole is damaged in plant cells, the cells may no longer be able maintain turgor pressure and store materials (water inclusive). Also, <u>If the cell cannot store raw materials via the large central vacuole, the chloroplast will lack the raw materials required for photosynthesis</u>.

8 0
3 years ago
Other questions:
  • How does the transfer of crops encourage changes in farming and irrigation techniques?
    7·1 answer
  • How did the human population change with the development of agriculture ?
    9·2 answers
  • What effect do small burrowing animals and earthworms have on rocks and soil in the ground
    13·2 answers
  • "which maternal condition is considered a contraindication"
    7·1 answer
  • Ecosystem number one contains many different species. Ecosystem number two contains only a few species. Which ecosystem will rec
    11·2 answers
  • Most energy sources are derived from the Sun's energy. True False
    6·2 answers
  • Name a
    6·1 answer
  • Antibiotics and antihypertensives are examples of what type of drug?
    8·1 answer
  • What must a cell do first to divide successfully
    8·2 answers
  • I need help <br>I would give brainliest ​
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!