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
Tju [1.3M]
3 years ago
7

Choose the correct statements 1.Self-pollination occurs when the pollen from the anther is deposited on the stigma of the same f

lower, or another flower on the same plant. 2.Cross-pollination is the transfer of pollen from the anther of one flower to the stigma of another flower on a different individual of the same species. 3cross-pollination occurs when the pollen from the anther is deposited on the stigma of the same flower, or another flower on the same plant. 4.Self-pollination is the transfer of pollen from the anther of one flower to the stigma of another flower on a different individual of the same species.
Biology
1 answer:
Mamont248 [21]3 years ago
7 0

Answer: The correct statements are 1 and 2:

1.Self-pollination occurs when the pollen from the anther is deposited on the stigma of the same flower, or another flower on the same plant.

2.Cross-pollination is the transfer of pollen from the anther of one flower to the stigma of another flower on a different individual of the same species.

Explanation:

Pollination is the transfer of pollen grains from an anthers to a receptive stigma. In most species of flowering plants, external agents bring about pollination. Also, flowers have evolved special structures and mechanisms to ensure successful pollination.

There are two types of pollination

--> Self pollination: This takes place when mature pollen grains from the anther of a flower fall on the stigma of the same flower or that of another flower on the same plant. This type of pollination brings the male gametes and egg cells of the same plant together. The resultant offspring show very little genetic variation.

--> Cross pollination: This occurs when mature pollen grains of a flower are transferred to the stigma of a flower of another plant of the same or closely related species. This brings the male gametes and egg cells of two different parent plants together. Therefore, there is greater genetic variation among the offspring.

You might be interested in
Mary is in an automobile accident and suffers a spinal cord injury. She has lost feeling in her lower body. Her doctor tells her
Dennis_Churaev [7]
<h2>C) option is correct </h2>

Explanation:

  • The spinal cord has numerous groups of nerve fibers going towards and coming from the brain
  • These have been collectively called the ascending and descending tracts of the spinal cord, respectively, these tracts are responsible for carrying sensory and motor stimuli to and from the periphery (respectively)
  • The ascending tracts transmit sensory information from the sensory receptors to higher levels of the CNS
  • The descending tracts originate from different cortical areas and from brain stem nuclei
  • The descending pathway carry information associated with maintenance of motor activities such as posture, balance, muscle tone, and visceral and somatic reflex activity
3 0
3 years ago
The measure of randomness or disorder in a system is known as
Oduvanchick [21]

The right option is; entropy

The measure of randomness or disorder in a system is known as entropy

Entropy is the property of the system and it is also often regarded to be the measure of molecular randomness or disorder in a closed but changing system. The higher the entropy of a system, the higher the disorder and the higher the unavailability of the system's energy to perform useful work.



4 0
2 years ago
A student's grade goes from a 95 to a 65 in 3 weeks. Calculate
steposvetlana [31]

-10grade/week

Explanation:

Given parameters:

Initial grade = 95grade

Final grade = 65grade

Time = 3weeks

Unknown parameter:

Rate of change of grade = ?

Solution:

Rate is defined as the change of a quantity with time.

 Rate of change of grade  = \frac{Final grade - Initial grade}{Time}

Rate of change of grade  = \frac{65 - 95}{3} = \frac{-30}{3}

Rate of change of grade = -10grade/week

The rate of change of the student's grade is -10grade/week. It implies that the grade of the student reduces by 10unit per week.

5 0
3 years ago
What type of plate boundary is illustrated in Figure 9-1?
sashaice [31]

Answer:This type of plate is Convergent plate boundary.

Explanation:from this figure we can see that two  plates meet together and one of this  plates go under the other  plate and this represent the convergent plate boundary.

6 0
3 years ago
Vhkojhvghgbjnkmlkhbvggvhbjnmhjb
Alex

Answer:

On slim shady's grave please stand up

Explanation:

7 0
2 years ago
Other questions:
  • Non-living factors in an ecosystem are
    5·2 answers
  • If shale is exposed to the correct amount of heat and pressure what can it become
    9·1 answer
  • What are the chromosomes found in an animal cell?
    12·2 answers
  • Which of these is an odorless, tasteless, invisible gas that comes from uranium in rocks and soil?
    12·1 answer
  • What organism is the first step in food chain/web? what organism is normally first step in aquatic food chain/web?\?
    11·1 answer
  • Omega-3 fatty acids appear to decrease the risk of heart disease. <br> a. True <br> b. False
    13·2 answers
  • Mitosis is done to produce _____ calls.​
    9·1 answer
  • What are the three parts of an atoms
    6·1 answer
  • Which of the following statements about coal is not true?
    11·2 answers
  • when you mix instant coffee creamer sugar and hot water all together what kind of mixture are you going to form​
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!