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
Lynna [10]
3 years ago
12

How is the shape of a shark's body adapted for swimming?

Biology
1 answer:
inn [45]3 years ago
7 0
Their bodies taper to points at both the snout and the tail, reducing water resistance. Also decreasing drag -- and therefore noise -- are dermal denticles, sharp scales that cover the skin of most shark species.  Rather than bone, sharks have cartilage, which is much lighter and more flexible. In addition, their livers produce squalene, a fatty oil that helps them remain afloat. Their pectoral fins allow them to quickly change direction, dive and swim upward.
 http://animals.mom.me/unique-adaptations-sharks-survive-7845.html
You might be interested in
How do abiotic factors in the environment affect ecosystems?
soldier1979 [14.2K]
Abiotic factors determine which organisms can survive in an ecosystem because they are the non living objects in an ecosystem
6 0
3 years ago
Read 2 more answers
Which clouds are best associated with a thunderstorm?
Dahasolnce [82]
B
Should be the right answer
6 0
2 years ago
Read 2 more answers
Intro about brazil. ...........................................................................
Nuetrik [128]
Are you serious okay dude
8 0
3 years ago
How can reproductive barriers form sympatric populations while their members remain in the same geographic area?
grandymaker [24]

Answer: Polyploidy

Explanation:

Polyploidy is defined as the phenomenon by which cells, tissues or organisms with three or more complete sets of chromosomes originate. Such cells, tissues or organisms are called polyploids.

If the genomes of a polyploid species come from the same ancestral species, it is said to be autopolyploid or autoploid. And if they come from two different ancestral species, it is said to be allopolyploid or alloploid. <u>Depending on the number of complete chromosome sets that the species has it is called triploid (3X), tetraploid (4X), pentaploid (5X), hexaploid (6X) and so on, where X is the monoploid number, and not to be confused with the haploid number. </u>

Redundant genetic elements of polyploid organisms can be transformed into single copies by sub-functionalization, neofunctionalization mechanisms or by the appearance of certain mutations.

<u>Two populations are sympatric when they exist in the same area and thus frequently encounter one another. </u>In general, different species cannot interbreed and produce healthy and fertile offspring due to barriers known as reproductive isolation mechanisms.  Polyploidy speciation is common in plants but rare in animals. So, animal species are much less tolerant of changes in ploidy. For example, human embryos that are triploid or tetraploid are not viable, cannot survive.

4 0
3 years ago
How can foreign pieces of DNA be transferred into organism?
irga5000 [103]
Viruses most likely.
7 0
3 years ago
Other questions:
  • Stimulus/Stress v.s. Response
    7·1 answer
  • How are the terms cancer and tumor related to one another?
    14·1 answer
  • What is the phenotype ratio for this cross ?
    9·2 answers
  • Lithium, sodium and potassium are all in group one on the modern periodic table.<br> Explain why.
    13·1 answer
  • Which type of rock forms when molten material cools and hardens inside Earth? an igneous rock an extrusive rock a rock with fine
    8·2 answers
  • ______________ came to mean the study or practice of improving the human race through selective breeding and, sometimes, restric
    8·1 answer
  • Which two characteristics describe all organisms in the domain Eukarya?
    7·1 answer
  • This is an example of which type of visual aid?
    12·2 answers
  • A _________ is an organic compound that must be obtained from the diet and is needed to sustain life.
    10·1 answer
  • When heterozygous advantage exists, how would you describe the fitness of the heterozygous genotype?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!