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
Agata [3.3K]
3 years ago
13

You are a plant physiologist who is studying the alternation of generations in ferns

Biology
1 answer:
mart [117]3 years ago
6 0
Pokoleniem dominującym u paprotników jest sporofit, czyli pokolenie bezpłciowe. Paprotniki są typowymi roślinami lądowymi, choć istnieją wśród nich gatunki, które wtórnie przystosowały się do wodnego trybu życia. Preferują miejsca wilgotne i zacienione. Są składnikiem różnych typów zbiorowisk roślinnych, głownie leśnych, ale też łąkowych i torfowiskowych. Są to głównie rośliny zielne, formy drzewiaste spotykamy jedynie w strefie tropikalnej. Mogą one osiągać nawet 7m wysokości. Należą do organowców, ponieważ można u nich wyróżnić organy zaopatrzone w wiązkę przewodzącą. Tymi organami są korzeń, łodyga i liście. Przystosowanie do lądowego trybu życia przejawia się w obecności takich tkanek jak epiderma, czyli skórka, tkanki przewodzącej, miękiszowej oraz wzmacniającej.

Pokoleniem dominującym u paproci jest sporofit. Pokolenie bezpłciowe rozmnaża się za pośrednictwem zarodników, czyli spor. Powstają one w zarodniach, zwanych inaczej sporangiami. Spory powstają z komórek macierzystych spor, w wyniku mejozy, są, więc haploidalne. Zarodnie często tworzą skupiska zwane kupkami, lub sorusami. Zarodnik kiełkuje w gametofit, zwany też przedroślem. W przemianie pokoleń paproci, gametofit jest pokoleniem ustępującym. Jest to najczęściej drobna, plechowata roślinka. Pozbawiona jest tkanki przewodzącej oraz korzeni. Do podłoża przytwierdza się za pomocą chwytników, zwanych, ryzoidami. Przedrośle ma najczęściej sercowaty kształt. Po jego spodniej stronie znajdują się rodnie, czyli archegonia, produkujące komórki jajowe oraz plemnie, czyli anterydia, produkujące plemniki. Plemniki zaopatrzone są w wici. Do procesu zapłodnienia niezbędna jest obecność wody. Plemniki przepływają w kierunku szyjki rodni i dokonują zapłodnienia. W wyniku zapłodnienia powstaje diploidalna zygota. Z zygoty, dzięki podziałom mitotycznym rozwija się sporofit. Początkowo jest on uzależniony od gametofitu, ale jak tylko wykształci pierwsze liście i zacznie przeprowadzać fotosyntezę usamodzielnia się. Przedrośle zaś obumiera.
You might be interested in
The scatterplots indicate the population of rabbits in the population over time. The y-axis represents the number of rabbits and
soldi70 [24.7K]

Answer:graph a?

Explanation:

edge2020

4 0
2 years ago
Plz answer will give brainliest, no scammers plz
notka56 [123]

Answer:

conclusion

Explanation:

hope this helps

4 0
3 years ago
Read 2 more answers
The observation that members of a population are uniformly distributed suggests that A. resources are distributed unevenly. B. t
ANEK [815]

The observation that members of a population are uniformly distributed suggests that   the members of the population are competing for access to a resource.

Option B is correct.

What is a resource ?

A resource is any physical material constituting a part of Earth that people need and value. Natural materials become resources when humans value them. The uses and values of resources change from culture to culture and from time to time. Resources are spatially distributed varying in quantity and quality.

Why the resources are important?

Resources are necessary for citizenry because of the following reasons: Resources when used as a raw material satisfy the needs and comforts of human beings. Natural resources are a source of agricultural activities which adds to the economic importance. They also provide employment opportunities.

Learn more about resource :

brainly.com/question/24514288

#SPJ4

5 0
1 year ago
monitoring performance to ensure that day-to-day goals are being implemented and taking corrective action as needed is known as
Cerrena [4.2K]

Given what we know, we can confirm that monitoring performance to ensure that day-to-day goals are being implemented and taking corrective action as needed is known as operational control.

<h3>What is operational control?</h3>
  • This type of control was explained in the question itself, some additional information is that it is a form of management.
  • The <u>operational control</u> is a form of first-line management.
  • It entails having the authority to make changes to a process in order to ensure day-to-day goals are met.

Therefore, we can confirm that that monitoring performance to ensure that day-to-day goals are being implemented and taking corrective action as needed is known as operational control.

To learn more about management visit:

brainly.com/question/3617478?referrer=searchResults

3 0
2 years ago
In Japan, food scientists have produced a type of watermelon that is square instead of
Tamiku [17]

Genetically modified (GM) foods are the ones came from organisms whose genetic material (DNA) are altered as they do not occur naturally. Food shortage, cost, variety can make people support the GM foods, while, religious beliefs, allergy, and worrying about the food can limit the support for these foods.

<h3>What are the characteristics of GM foods?</h3>

Genetically modified (GM) foods are those derived from organisms the ones genetic material (DNA) has been altered as they do not occur naturally.

Its characteristics are:

  • More nutritious food.
  • Less use of pesticides.
  • Faster growing plants and animals.
  • Disease- and drought-resistant plants.

As food shortage, cost, variety can make people support the GM foods, while, religious beliefs, allergy, and worrying about the food can limit the support for these foods.

Thus, the correct option is A.

For more details regarding genetically modified crops, visit:

brainly.com/question/21807373

#SPJ1

6 0
2 years ago
Other questions:
  • Explain Hertzspeung-Russell diagram relationship to stars life cycles
    10·1 answer
  • Carine went to the doctor for a physical. Her blood pressure was 80/50. What describes Carine’s condition, and what is the most
    6·2 answers
  • Which circumstance can cause negative population growth?
    11·2 answers
  • Today, it's widely accepted that all of the two-legged meat-eating dinosaurs known as theropods— including t. rex and albertosau
    8·1 answer
  • 1. Using the scientific definition of work, does a greater amount of force always result in a greater amount of work? Why or Why
    13·1 answer
  • What were gregor mendel's main experiments?
    7·1 answer
  • Fishes are poor bioindicators of the environmental health of an aquatic system.
    12·1 answer
  • How much energy moves up from one trophic level to the next in the energy pyramid​
    15·1 answer
  • What are the four classes of nutrients?
    13·1 answer
  • How is the skin part of the integumentary system and the excretory system?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!