<span>One way to repel the insect pests in an apple orchard without using chemical pesticides is by planting marigold near it. Marigold contains a compound known as Pyrethrum. It produces a certain smell that even gardeners doesn't like. Pyrethrum is also one of the components in making insecticides.</span>
The answer is B. <span>hairy stems (dominant).
</span>If:
H - the dominant allele for hairy stems,
h - the recessive allele for non-hairy stems,
then:
HH - dominant homozygote with hairy stems,
Hh - heterozygote with hairy stems,
hh - recessive homozygote with non-hairy stems.
In autosomal dominant traits, the phenotype is
present if both copies of the dominant allele (H) are present (homozygous
individuals HH) or only one copy of the dominant allele is present
(heterozygous individuals Hh).
In this case all of the batch of tomato plants were <span>heterozygous individuals Hh with hairy stems:
</span>
Parental generation: HH x hh
F1 generation: Hh Hh Hh Hh
The human immune virus cannot reproduce without host cells.
<h3>Human immune virus</h3>
The human immune virus is an RNA virus that only becomes active in human hosts.
When the virus gains access into a suitable host, it embeds its genome into that of the host and as such, the genetic machinery of the host is utilized to multiply the genome of the virus.
With time, the virus gradually takes over the host's genome system and breaks down their immune system, making them susceptible to diseases.
More on the human immune virus can be found here: brainly.com/question/16142422
Answer:
Sea floor spreading
Explanation:
Sea floor spreading results in the formation of the oceanic basin.
After water has filled the basin, the sea floor begins to spread and move apart creating the ocean crust and its basins.
These are all due to different plate interactions within the earth.
After the crust has formed and filled with water, at divergent margins, new ocean floors are formed by volcanic activities at spreading centers.
The new crust is produced near the margin and subsequent ones push against it and away. The formation of new ocean floors product ocean basins.
Answer:
what is the question can't understand