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
Arturiano [62]
3 years ago
7

A student conducted an investigation to study phototropism in grasses. The only difference between the control group and the exp

erimental group was light conditions. The control group was provided full light, while the experimental group was shaded on one side. The diagrams show the average heights and positions of blades of grass in the investigation. Which statement best explains why the grass tips of the experimental group bent toward the light?
a) Water evaporated faster on the side of the plant having full light.
b) Light sensors in the grass tips stimulated a hormone in the shoot system.
c) The xylem in the root system absorbed more nutrients from the shaded side.
d) The side facing the light has a greater chance of absorbing carbon dioxide from the atmosphere.
Biology
1 answer:
Maurinko [17]3 years ago
3 0

Answer:

Option-B

Explanation:

Phototropism refers to the movement of plants in response to light. The mechanism of phototropism involves the photoreceptors which respond to a different wavelength of light: the phytochromes to red light, cryptochromes to blue light and the phototropin to the UV light.

Plants integrate the signals obtained from these receptors and then activates the gene which will be involved in the phototropism.

The gene could be the production of the auxin hormone and the PIN proteins which helps in the distribution of the auxin in the plants. Due to the production of this hormone and its distribution in the shoot, the grass tips bend towards the light.

Thus, Option-A is correct.

You might be interested in
What might happen within an ecosystem if the snake population runs out of small animals to eat such as mice or rabbits?
ozzi
If the snake population runs out of small animals to eat such as mice or rabbits then the snakes would starve and die unless they could move to another habitat. All of the other animals in the food web would also die due to their lack of food supplies. The populations of the consumers would fall as the population of the producer fell.

HOPE THIS HELPS! :)
8 0
3 years ago
White matter is found in all of the following locations EXCEPT the ________. a) cerebral cortex b) corpus callosum c) corticospi
Eddi Din [679]

Answer:

cerebral cortex

Explanation:

  • The tissue through which the messages are relayed between different areas of the grey matter is termed the white matter.
  • The nerve fibers present in the white matter are surrounded by myelin due to which they appear white and hence, the name.
  • White matter is present in deeper parts of the brain and on the superficial parts of the spinal cord in the central nervous system.
  • White matter under normal conditions is absent from the cerebral cortex.
3 0
3 years ago
Which option is an electron carrier? (1 point)
spayn [35]

Answer: FADH2

Explanation:

6 0
3 years ago
5 Relate How do the structures in an organism<br>relate to their functions?​
Olin [163]
Function and structure are related, because of a certain structure a living thing make contain makes the object function the way it does. ... The relationship of a structure and function is the structuring levels from molecules to organism ensure successful functioning in all living organism and living system.
4 0
4 years ago
In a dihybrid cross of two heterozygous individuals, you expect a 9:3:3:1 phenotypic ratio in the offspring, but observe a ratio
almond37 [142]

Answer:

e. Epistatic interaction of the two genes

Explanation:

The 9:7 ratio is typical of the Duplicate Recessive Epistasis.

The expected phenotypic ratiio of the offsrping of a dihybrid cross is:

9 A_B_

3 A_bb

3 aaB_

1 aabb

In the Duplicate Recessive Epistasis, the A_bb, aaB_ and aabb individuals all have the same phenotype, making for the ratio 9:7. What those three genotypes have in common is that in all of them at least one of the two genes  is homozygous recessive (either <em>aa</em> or <em>bb</em>).

This usually happens one the products of genes A and B are enzymes of the same metabolic pathway.

Whenever both A and B are present, the pathway can produce the final product and a certain phenotype. However, if any of the dominant alleles is missing, the enzyme is not produced and therefore the final product of pathway is not produced, giving the other phenotype.

3 0
3 years ago
Other questions:
  • Why are there different normal values for hemoglobin levels and rbc count in males and females?
    6·1 answer
  • Caves are formed by the actions of<br> acid rain<br> plant roots<br> river water<br> groundwater
    6·2 answers
  • What would happen if heat were not trapped in Earth’s atmosphere?
    11·2 answers
  • Which two pieces of data indicate that Uranus resides in the outer region of the solar system?
    10·1 answer
  • A group of students are reviewing the anatomy and physiology of the breasts. The students demonstrate understanding of breast st
    14·1 answer
  • A. Mitochondria
    14·1 answer
  • What is the function of the highlighted muscles
    9·1 answer
  • Codominance involves
    6·1 answer
  • List two general differences between inner and outer planets. <br><br> Astronomy.
    13·2 answers
  • How do earthquakes impact ecosystems?<br><br><br><br>pls help me!!!!!! :)
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!