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How would you design, in principle, an experiment to test the hypothesis that a certain variety of lettuce seed needed daylight in order to germinate?
You would need as large a sample of seeds as was convenient for counting, say 30. The seeds would be provided with water and a suitable temperature. The seeds, in a suitable container, would be placed in a light-proof box or cupboard for a period long enough to allow germination.
The box or cupboard would not be opened during this period.
The similar number of seeds, from the same batch (same packet), would be given identical conditions of moisture and temperature but placed in daylight for the same period of time. At the end of this period the numbers of seeds which germinated in every case would be counted and compared.
(a)State the law of independent assortment. (b )Using punnett square demonstrate the law of independent assortment in a dihybrid cross including two heterozygous parents.
Adverse effects of Abacavir In 3-9% of patients, a severe hypersensitivity reaction, usually with fever and sometimes with respiratory or gastrointestinal symptoms, malaise an
y it was critised
How to calculate the raw score for each scale The raw score for each scale is the sum of the 0, 1 and 2 item scores. Thus, the higher the score, the poorer the performance. Th
TEMPERATURE Temperature is a major physical environmental factor which profoundly influences the vital activities of living organisms like, metabolism, growth and reproduction.
Hormone s . The thyroid gland secretes following hormones. Thyroxine (tetraiodothyronine or T 4 )' and tri-iodothyronine or T 3 are secreted by the thyroid follicular cells.
How do chloroplasts multiply? Like mitochondria chloroplasts have their own DNA, RNA and ribosomes and they self-replicate through binary division.
What are the Results of prosthetic valve endocarditis? The hospital mortality for valve replacement for endocarditis varies between 4- 30 per cent. Operative mortality is highe
Apomictic embryos in citrus arise from: 1. Synergids 2. Maternal sporophytic tissue in ovule 3. Antipodal cells 4. Diploid egg Maternal sporophytic tissue in ovule
Functions of Stomata The cuticle forms outermost surface of the leaf and offers resistance to the evaporation of water vapour and entry of carbon dioxide necessary for photosy
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