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2 years ago

Describe briefly about sericulture

1 answer:

7 0

Sericulture, or silk farming, is the rearing of silkworms for the production of silk. Although there are several commercial species of silkworms, Bombyx mori (the caterpillar of the domesticated silk moth) is the most widely used and intensively studied silkworm. Silk was first produced in China as early as the Neolithic period. Sericulture has become an important cottage industry in countries such as Brazil, China, France, India, Italy, Japan, Korea, and Russia. Today, China and India are the two main producers, with more than 60% of the world's annual production.

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Even though most plants are angiosperms, gymnosperms still have an advantage in certain environments. In what type of environmen

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Answer:

gymnosperms are more successful around water bodies

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2 years ago

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1. Sustainable 2. Environmental

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2 years ago

Which statement is true about nuclear decay

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Answer:

Nuclear decay rates are constant

Explanation:

Spontaneous decay of unstable nuclei is a process of a statistical nature, it is not possible to predict with certainty when an individual radioactive nucleus will decay, nor can the decay process be influenced in any way.

Therefore, the half-life of radionuclides (specific for each radionuclide) is defined as the time period in which half of the initial number of radioactive nuclei decays.

The unit of measurement for the radioactivity of the material is the becquerel (Bq) and denotes the number of decays in one second (1Bq = 1 decay / 1 second).

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2 years ago

The smallest functional found within a cell are called

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In general, the term organelle is used for the small structures within a cell.

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2 years ago

Two independently segregating genes determine kernel color in wheat. Red color results from at least one dominant allele in both

Lera25 [3.4K]

Answer:

a) The expected phenotype of the F1 plants is 100% RrBb, red kernels.

b) The expected phenotypic classes in the F2 are: 9:3:3:1

9/16 R-B-, 3/16 rrB-, 3/16 R-bb, 1/16 rrbb

Proportions 9:6:1.

9/16 Red kernel (R-B-), 6/16 Brown kernel (rrB- + R-bb), 1/16 White kernel (rrbb)

Explanation:

Available data:

red kernel: R-B-

brown kernel: R-bb or rrB-

white kernel: rrbb

1º Cross) RRBB x rrbb

F1) 100% RrBb (red kernels)

2ºCross) RrBb x RrBb

Gametes) RB RB

Rb Rb

rB rB

rb rb

Punnet Square) RB Rb rB rb

RB RRBB RRBb RrBB RrBb

Rb RRBb RRbb RrBB Rrbb

rB RrBB RrBb rrBB rrBb

rb RrBb Rrbb rrBb rrbb

F2) Phenotypic classes:

9/16 R-B-

 3/16 rrB-

 3/16 R-bb

 1/16 rrbb

Phenotypic proportions:

9/16 Red kernel (R-B-)

6/16 Brown kernel (rrB- + R-bb)

1/16 White kernel (rrbb)

7 0

2 years ago