When pollen lands on the stigma of a flower, it grows a tube to travel down to the ovary? 1.) True 2.) false

1 answer:

5 0

The answer is 1.) True.

Pollen tube used to transport pollen from the stigma of a flower to the ovary. Actually, it begins to grow when lands on the stigma. It grows until it reaches an ovule which is inside the ovary. This way it is secured that a nucleus of pollen will fuse with a nucleus of the ovule and that fertilization will occur.

You might be interested in

IN YOUROWN WORDS explain what is hypnosis?

iogann1982 [59]

the induction of a state of consciousness in which a person apparently loses the power of voluntary action and is highly responsive to suggestion or direction. Its use in therapy, typically to recover suppressed memories or to allow modification of behavior by suggestion, has been revived but is still controversial.

4 0

3 years ago

List the five conditions that disturb genetic equilibrium in a population. Explain.

Ivan

No gene mutations occurring at that locus or the loci associated with the trait 
• A large population size • Limited-to-no immigration, emigration, or migration (genetic flow) 
• No natural selection on that locus or trait 
• Random mating (panmixis) It can describe other types of equilibrium as well, especially in modeling contexts.

6 0

3 years ago

Which of these describes a population? A. all the organisms that interact in a lake B. all the gray squirrels that live in a for

tiny-mole [99]

Yes, it is B, because A population is
a sum of all the organisms of the same group or species.

3 0

3 years ago

Read 2 more answers

Rats colonize an archipelago in the Pacific Ocean where no rats previously existed. The rats can have white fur, grey fur, or bl

forsale [732]

The type of selection which is likely to occur on the following phenotypes:

Stabilizing selection: grey fur

Diversifying selection: dark fur on island and light on another island. Dark fur in forests and light in fields

Directional selection: dark and light fur

When individual people with such character traits generate more surviving offspring than individual people with other characteristics, this is referred to as phenotypic selection. Although selection is widely regarded as the primary driver of evolutionary change, scientists have only lately started to quantify its effects in the wild.

Because phenotype influences differential reproduction and survivorship, selection acts on phenotypes. If the phenotype influencing reproduction or survival rates is genetically determined, selection can indirectly winnow out genotypes by winnowing out phenotypes.

For more information on phenotypic selection, visit :

brainly.com/question/12226774

#SPJ4

5 0

1 year ago

I would like to have all the answers

Harrizon [31]

1. independent: the cow dependent: food with growth hormone

2. independent: mosquito dependent: repellent

3. independent: test dependent: time spent on studying

4. independent: cars dependent: speed

5. independent: people dependent: diet pill

Im not to sure on the hypothesis but I hope this helps!

6 0

3 years ago