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
Archy [21]
2 years ago
14

Recently, genes have been indentified in angiosperms that are important in preventing pollen from germinating or growing into th

e stigma. The locus where the genes are found has been termed theA.strict reproductive locus B.similarity locus C.selfless locus D.sterility locus
Biology
1 answer:
Marizza181 [45]2 years ago
5 0

Answer:

D. Sterility Locus

Explanation:

Angiosperms have several mechanisms to prevent self-pollination due to the advantage of cross-pollination. One of such mechanisms is self-incompatibility genes present on the sterility locus.

These genes determine the germination of the pollen on the stigma. If both the pollen and stigma carry the same allele of the gene present at the sterility locus, the germination of pollen is prevented.  

The sterility locus has multiple alleles and the presence of the same alleles at the same locus in both pollen and stigma prevents the pollen germination.

For example, pollen from S1S2 individuals can not germinate on the stigma with the S1S3 genotype. Here, the pollen does not obtain water as required for germination from the stigma and are unable to germinate.  

You might be interested in
In an article about saving the whales written by a marine biologist, which word might be used by the author to make you want to
fgiga [73]

Answer:

Endangered

Explanation:

Endangered species are organisms that are at risk of extinction if deliberate efforts are not made to conserve them due to a rapid decrease in their population.

<em>Hence, if a marine biologist writes an article about saving whales and labels them as </em><em>endangered species</em><em>, all efforts should be geared towards saving the animals lest they go extinct and leave a vacuum in the functioning of the ecosystem.  Every species have the critical roles they play in the functioning of the ecosystem and the extinction of any particular species represents a loss that might not be replaceable. </em>

6 0
2 years ago
Read 2 more answers
PLSSSS HELPPPPPPPP ME THIS IS SO HARD PLSSS
creativ13 [48]

Explanation:

read the passage first

6 0
2 years ago
Read 2 more answers
Which of the following best describes cell communication processes that are present in bacteria, yeast, and multicellular organi
Savatey [412]

Answer:

They release chemical messengers to communicate with cells they may or may not be in direct contact with.

Explanation:

Unicellular organisms such as bacteria or yeast, 'talk' to each other through the release of chemicals. In bacteria, this is known as quorum sensing which allows them to determine the surrounding bacterial population density. In yeast, one of the more popular pathways is known as the mating factor pathway, which allow the organisms to find mates. Whereas, in multicellular organisms (such as humans), this chemical release allows for cell-cell co-ordination which keeps the system functioning correctly.

5 0
3 years ago
What genetic factors might be responsible for a change in an organism's body plan
german
A genetic mutation. It's known as malformation. It can be caused by a trisomy in one of the alleles, or an affected gene.
8 0
3 years ago
What 3 green house gases are in our atmosphere
Andreyy89

Answer:

Carbon dioxide, nitrous oxide, and methane

Explanation:

4 0
2 years ago
Other questions:
  • PLEASE HELP ME WITH MY SCIENCE
    11·2 answers
  • In the scientific name, pan paniscus, pan represents the name of the ____ while paniscus represents the name of the ____
    11·2 answers
  • 12.
    9·1 answer
  • Why are brown algae considered protist even though they are multicellular
    15·1 answer
  • What is the name of the continent, name of the largest city, geographic feature.
    10·1 answer
  • Algae at the beginning of a food chain would be considered
    9·1 answer
  • Assume that a deletion mutation occurs within the trp operon so that the DNA corresponding to the last (distal) part of region 1
    7·1 answer
  • How might vital capacity be important to a musician?
    12·1 answer
  • Magma that cools below Earth’s surface forms ____ rock.
    5·2 answers
  • Can a human male be a carrier of red-green color blindness?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!