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Lyrx [107]
2 years ago
6

Is it possible to have a knockout mutant plant that shows no visible phenotype that is different from the wild-type plant?

Biology
1 answer:
joja [24]2 years ago
5 0

Answer:

Molecular genetic approaches to the study of plant metabolism can be traced back to the isolation of the first cDNA encoding a plant enzyme (Bedbrook et al., 1980), the use of the Agrobacterium Ti plasmid to introduce foreign DNA into plant cells (Hernalsteens et al., 1980) and the establishment of routine plant transformation systems (Bevan, 1984; Horsch et al., 1985). It became possible to express foreign genes in plants and potentially to overexpress plant genes using cDNAs linked to strong promoters, with the aim of modifying metabolism. However, the discovery of the antisense phenomenon of plant gene silencing (van der Krol et al., 1988; Smith et al., 1988), and subsequently co‐suppression (Napoli et al., 1990; van der Krol et al., 1990), provided the most powerful and widely‐used methods for investigating the roles of specific enzymes in metabolism and plant growth. The antisense or co‐supression of gene expression, collectively known as post‐transcriptional gene silencing (PTGS), has been particularly versatile and powerful in studies of plant metabolism. With such molecular tools in place, plant metabolism became accessible to investigation and manipulation through genetic modification and dramatic progress was made in subsequent years (Stitt and Sonnewald, 1995; Herbers and Sonnewald, 1996), particularly in studies of solanaceous species (Frommer and Sonnewald, 1995).

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All of the populations of different species that occupy and are adapted to a given area are referred to by which term?
Natasha2012 [34]
<span>All of the populations of different species that occupy and are adapted to a given area are referred as a community.

In a community, there will be many populations of different species. Population is a group of individual in a certain area. The more species in the community, the more complex it is.</span>
6 0
3 years ago
In many parts of the world, the average age of reproductive maturity is increasing as humans move from urban to rural environmen
Olin [163]

Answer:

Increase in France.

Explanation:

A 5-year increase in the average age of reproduction in both countries i.e. France and India, it will greatly affected the per capita birth rate of both countries but higher in France because the average age of reproduction is higher in France as compared to India. The average age of first reproduction is 15 years old in India and 20 years old in France but with the increase of 5 years, the average age of first reproduction is 20 years old in India and 25 years old in France.

6 0
3 years ago
An insurance premium is paid by...
Anastaziya [24]
Hey there!

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Hope this helped!
8 0
3 years ago
How does life form from a fertilized egg?
Liono4ka [1.6K]

Answer: As a fertilized human egg divides, it first becomes a solid ball of cells, the morula. ... The cells of the outer layer of the blastocyst eventually form part of the placenta. Inside the ball is a small clump of cells, the inner cell mass, that will form all the tissues in the body.

Explanation:

8 0
2 years ago
Amphibians are not completely free to live on dry land because
Strike441 [17]

Answer: Option C

Explanation:

Amphibians are the animals that live on land and spend some part of their life cycle. These organism live on land and partially live inside water during the time of reproduction.

Amphibians lay eggs in water as their eggs are not hard shelled eggs. The females lay eggs in water known as larvae.

They are also known as tade pole that live in water and respire through gills but as they grow old they develop lungs to respire on land.

Hence, the correct answer is Option C

5 0
3 years ago
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