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
jek_recluse [69]
3 years ago
13

Plant hormones act by directly affecting the activities of

Biology
1 answer:
natta225 [31]3 years ago
3 0
The answer is: Signal transduction pathways. 
You might be interested in
Describe how climate would be influenced if:
madam [21]
  1. The rate of energy coming from the Sun changes slightly day to day. .It has been suggested that changes in solar output might affect our climate—both directly, by changing the rate of solar heating of the Earth and atmosphere, and indirectly, by changing cloud forming processes.
  2. The axial tilt angle affects climate largely by determining which parts of the earth get more sunlight during different stages of the year Likewise, during winter for the northern hemisphere, there would be fewer hours of daylight because the northern hemisphere would essentially be pointed away from the sun.
  3. If an asteroid were to strike land or a shallow body of water, it would eject an enormous amount of dust, ash, and other material into the atmosphere, blocking the radiation from the Sun. This would cause the global temperature to decrease drastically.
  4. The Sun's irradiance has its greatest effect on Earth's upper atmosphere, while the lower atmosphere insulates Earth from the increased heat. If the Sun were driving Earth's warming, one would expect to see that upper atmosphere getting increasingly hot.\
  5. have a nice day sorry if wrong T_T
4 0
2 years ago
Two true-breeding stocks of pea plants are crossed. one parent has red, axial flowers and theother has white, terminal flowers;
xxTIMURxx [149]
This is a typical case of a dihybrid cross. 
From the phenotype of the offspring, we can conclude that the gene for the red color of the flower and the gene for the axial position of the flower are dominant.
Since we know that the ratio of phenotypes in a dihybrid cross of independently inherited alleles is
9(dominant for both traits)
3(dominant for one trait, recessive for the other)
3(dominant for the second trait, recessive for the other)
1(recessive for both traits)
we can expect 3/16 of the f2 generation to be dominamt for one trait and recessive for the other (red, terminal flowers), or to be precise 190 individuals.
7 0
3 years ago
When a muscle cell contracts, Group of answer choices the position of each myosin head is identical at any given moment. some my
White raven [17]

Answer:

When a muscle cell contracts, the myosin heads each produce a single power stroke.

Explanation:

In rest, attraction strengths between myosin and actin filaments are inhibited by the tropomyosin. When the muscle fiber membrane depolarizes, the action potential caused by this depolarization enters the t-tubules depolarizing the inner portion of the muscle fiber. This activates calcium channels in the T tubules membrane and releases calcium into the sarcolemma. At this point, <em>tropomyosin is obstructing binding sites for myosin on the thin filament</em>. When calcium binds to the troponin C, the troponin T alters the tropomyosin by moving it and then unblocks the binding sites. Myosin heads bind to the uncovered actin-binding sites forming cross-bridges, and while doing it ATP is transformed into ADP and inorganic phosphate which is liberated. Myofilaments slide impulsed by chemical energy collected in myosin heads, <u>producing a power stroke</u>. The power stroke initiates when the myosin cross-bridge binds to actin. As they slide, ADP molecules are released. A new ATP links to myosin heads and breaks the bindings to the actin filament.  Then ATP splits into ADP and phosphate, and the energy produced is accumulated in the myosin heads, which starts a new binding cycle to actin.  Z-bands are then pulled toward each other, thus shortening the sarcomere and the I-band, and producing muscle fiber contraction.

3 0
3 years ago
Why can’t your body heal an amputation the same way it can heal a cut?
Pani-rosa [81]

Answer:

because the mother sells are less for that kind of cuts so they don't regenerate and in a cut its easier because they are just in number for that cut

Explanation:

8 0
2 years ago
Several species of fish in the genus Astyanax occur only in the waters in completely dark underground caves. These blind cave fi
Sunny_sXe [5.5K]

Answer:

a vestigial structure

Explanation:

Vestigial structures are a rudimentary (or even functionless) version of a body part, but they have important functions in a closely correlated or evolutionarily close species, an example of which is the presence of eyes in fish of the genus Astyanax. The existence of these vestigial structures is strong evidence that evolution occurs in organisms, since this structure, today without much apparent function, may in the past have been extremely important to the ancestors of that species.

7 0
3 years ago
Read 2 more answers
Other questions:
  • _______ are responsible for converting sensory messages into neural impulses.
    10·2 answers
  • The conspirators beg for the return of my brother
    6·1 answer
  • What process do frogs undergo that physically changes them from a tadpole to an adult tetrapod?
    11·1 answer
  • Apply a small amount of heat to 5 grams of water and 5 grams of aluminum. The temperature of the aluminium increases more then t
    5·1 answer
  • An owl and a bat share the same kingdom and phylum; an owl and a robin share the same kingdom, phylum, and class. Which of the f
    14·1 answer
  • 2. Nitrogen, as it is found in the ATMOSPHERE, can be used by plants and
    12·1 answer
  • Processes that increase the density of seawater include evaporation and _____.
    13·2 answers
  • Somatic cells in humans contain ____ chromosomes and an example is ______.
    6·1 answer
  • La pérdida de un cromosoma homólogo se conoce como:?
    13·2 answers
  • Who going to get the 50 points....................................................:..
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!