Rajesh observed a patch of greenish black powdery mass on a stale piece of bread.​

Answers 2

Answer:

The patch is Fungus

Explanation:

It feeds on the bread if , bread is left in open

Rhizopus stolonifer is the  greenish black fungus found on the stale bread.

Explanation:

Rhizopus stolonifer is the greenish black fungus found on the stale bread.

  • The greenish black powdery substance found on the stale bread is Rhizopus stolonifer. They usually appear as green and black patches on bread.
  • Bread molds grow easily on stale bread it is a nutritious medium. They are rich in sugars, contain moisture and are a perfect breeding spot.
  • Fungi are organisms which grow on rotting food materials or damp places, crevices of wood and feed on the organic matter and they reproduce by producing spores.
  • There are several types of fungi which grow on bread. Some of the most common fungi on bread are Pencillium bread mold, Cladosporium bread mold, Aspergillus niger mold, etc.

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The blood from the heart is transported to all parts of the body by the .​
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(i) The blood from the heart is transported to all parts of the body by the arteries. (ii) Haemoglobin is present in red blood cells.

Answer:

The blood from the heart is transported to all parts of the body by the arteries

Mustard was growing in two fields- A and B. While Field A produced brown coloured seeds, field B produced yellow coloured seeds. It was observed that in field A, the offsprings showed only the parental trait for consecutive generations, whereas in field B, majority of the offsprings showed a variation in the progeny. What are the probable reasons for these?

Answer:

The offspring of mustard plants in field A produced brown coloured seed whereas the offspring of mustard plants in field B produced variation in colours. The probable reason for this will be that the brown colour phenotype is a dominant character and the yellow colour phenotype is a recessive character. The plants in field A will have dominant genotype (BB) and plants in field B will have recessive genotype (bb). Therefore, the cross-pollination between the plants will produce only dominant character in field A and both dominant and recessive character in field B.

Explanation:

The plants of field A with genotype (BB) and brown seeds when cross-pollinated with plants of field B with genotype (bb) and yellow seeds resulted in plants with genotype (Bb), hence the progeny were all brown. Also, the self-pollination in this case (BB x BB) resulted in brown seeds only.

Whereas,  plants of field B with genotype (bb) and yellow seeds when cross-pollinated with plants of field A with genotype (BB) and brown seeds resulted in plants with genotype (Bb), hence the progeny were all brown. Also, the self-pollination in this case (bb x bb) resulted in yellow seeds. Therefore, the progeny in field B were of varied colours.

Answer:

the offspring of mustard plant in field A produced brown coloured seed wheare as in field B it produce variations in colour

Seasonal indices are obtained by using​

Answer:

The measurement of seasonal variation by using the ratio-to-moving-average method provides an index to measure the degree of the seasonal variation in a time series. The index is based on a mean of 100, with the degree of seasonality measured by variations away from the base.

Prepare beetroot indicator and test some acids bases write a report

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