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tatyana61 [14]
3 years ago
13

When a pollen grain reaches the stigma of a plant the plant has been?

Biology
1 answer:
PIT_PIT [208]3 years ago
8 0
The plant has been pollinated. Pollination is the process by which pollen reaches the carpel (female reproductive organ in a flower which consists of the stigma, the style and the ovary), of a flower, transferred from the anther to the stigma, or reaches the ovule directly (in confers and their relatives).
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Anyone good at Biology could you give me a helping hand please!
andriy [413]
1. Anaphase. In <span>Anaphase the sister chromatids separate from each other to the opposite sides of the cells.

2. </span>Chromosomes would not separate into two nuclei. <span>Mitosis is a process cell division, where one cell divides into two identical cells.
</span>
3. Metaphase I. <span>Meiosis prophase I is the phase in which chromosomal crossing over occurs. The phase after prophase I is metaphase I.

4. </span>Its body cells would have 36 chromosomes, and its gametes would have 18 chromosomes. <span>In the gametes, there are half of the number of chromosomes present in the body cell.

5. </span><span>A species has to adjust rapidly to a changing environment. To adjust to the environment, crossing over is necessary, and it does not occur in mitosis, but meiosis.

6. 50 percent. 
Parents:          Yy      x     yy
Offspring:    Yy    Yy    yy   yy
50 % is Yy  and 50% is yy.

7. </span><span>One parent had white eyes and the other was heterozygous for eye color. The ratio in the offspring is 50-50. The only possibility is the following:
Parents:       Rr     x     rr
Offspring   Rr    Rr   Rr   Rr

8. </span><span>Their fur will be a mixture of red and white hairs. The offspring will be heterozygous. They will have alleles for both red and white hairs and both will be expressed.
</span>
9. Not enough information.

10. <span>Both of the parents' genotype must have been Pp. The genotype of the white plant is pp since it is recessive:
Parents:        Pp     x     Pp
Offspring:   PP   Pp   Pp   pp
One of the four is white.</span>

4 0
4 years ago
A pesticide inhibits the activity of a particular enzyme a, which can therefore be used to assay for the presence of the pestici
Anon25 [30]
<span>In order to react to the stimulus and catalyze the reaction necessary for the desired outcome, enzyme require a process in which they bind with the substrates in the given experiment, which will then allow the enzymes to undergo the process they are attempting to implement.</span>
7 0
3 years ago
1.270 calves were born from gray-variegated cattle. Of these, 136 have parental coloring. Determine the genotype and phenotype o
amid [387]

Answer:

This is hard

Explanation:

5 0
3 years ago
An aquifer is a rock layer that stores and allows the flow of groundwater. Compared to other types of rock layers, how permeable
AVprozaik [17]

Highly porous and permeable

Explanation:

Compared to other types of rock layers, an aquifer is highly porous and permeable.

Aquifers are always the target when prospecting for ground water in a formation.

  • Porosity is the amount of void spaces in a rock.
  • Aquifers are highly porous .
  • Permeability is the inter-connectivity of the void spaces and their ability to transmit fluids.
  • Aquifers have very high permeability compared to other rock types.

In terms of permeability and porosity, an aquifer is higher porous and permeable.

learn more:

Biogeochemical cycle brainly.com/question/3509510

#learnwithBrainly

6 0
3 years ago
Which of the following is an example of how a species may change over time?
allsm [11]

Answer: possibly A

Explanation: B an C are not it because they are more like mutations. D humans don’t always become immune.

5 0
3 years ago
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