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Deficiency symptoms of nitrogen and potassium are visible first in:

A
Roots

B
Buds

C
Senescent leaves

D
Young leaves

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Texts: T4 bacteriophage uses E. coli as a host. T4 bacteriophage has a single-strand binding protein (SSB) called gp32, and a temperature-sensitive (ts) mutant of gp32 was created. After infecting the ts mutant with E. coli, it was grown in a medium containing [3H] thymine under conditions 1) and 2) below, and then DNA was isolated. The picture below shows the results of wild-type T4 bacteriophage infected with E. coli, grown in a medium containing [3H] thymine at 25°C, and then DNA isolated and subjected to ultracentrifugation. Referring to the picture above, draw the profile from ultracentrifugation of DNA isolated under each condition below and briefly explain the reason for drawing this profile. When T4 bacteriophage ts mutant was grown at 25°C: 40 30 [3H] tritium incorporated 20 10 1 - - - 5 10 15 20 Fraction number 25 30 When T4 bacteriophage ts mutant was grown at 42°C: 40 30 [3H] tritium incorporated 20 10 1 - - - 5 10 15 20 Fraction number 25 30 Explanation: The profile from ultracentrifugation of DNA isolated under each condition is drawn to analyze the distribution of [3H] tritium incorporated into the DNA. The y-axis represents the amount of [3H] tritium incorporated, while the x-axis represents the fraction number. The peaks in the profile indicate the presence of DNA fragments with varying sizes and densities. By comparing the profiles under different conditions, we can observe any differences in the distribution of [3H] tritium incorporated, which can provide insights into the replication and growth of T4 bacteriophage in different temperature conditions.
Question 2
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Bryophytes are also called amphibians of the plant kingdom because these plants can live in soilbut are dependent on water for sexual reproduction. They usually occur in damp, humid and shaded localities. They play an important role in plant succession on bare rocks/soil. Tt are fould body of bryophytes is more differentiated than that of algae. main plant body of the bryophyte is haploid. It produces gametes, hence The male sex organ is antherozoids. The is called antheridium. They produce biflagellate and produces a single egg. The antherozoids are released into water where they come in contact with archegonium. An antherozoid fuses with the egg to produce the with archegonium. An antherozoid fuses with the immediately. They produce a multicellular body called a sporophyte. The sporophyte is not free-living but attached to the photosynthetic gametophyte and derives nourishment from it. Some cells of the sporophyte undergo reduction division (meiosis) to produce haploid. spores. These spores germinate to produce gametophyte. Bryophytes in general are of little economic importance but some mosses provide food for herbaceous mammals, birds and other animals. .) "Species of Sphagnum, a moss, provide peat that have long been used as fuel, and as packing material for trans-shipment of living material because of their capacity to hold water. Mosses along with lichens are the first organisms to colonise rocks and hence, are of great ecological importance. They decompose rocks making the substrate suitable for the growth of higher plants. Since mosses form dense mats on the soil, they reduce the impact of falling rain and prevent soil erosion. The bryophytes are divided into liverworts and mosses. 3.2.1 Liverwortsatia, Micia funaria, towachden Polyt The liverworts grow usually in moist, shady habitats such as banks of sphoghe streams, marshy ground, damp soil, bark of trees and deep in the woods. The plant body of a liverwort thalloid, ).g. (Marchantia) The thallus is dorsiventral and closely appressed to the substrate. The leafy members have tiny leaf-like appendages in two rows on the stem-like structures. Asexual reproduction in liverworts takes place by fragmentation of thallii, or by the formation of specialised structures called gemmae (sing. gemma). Gemmae are green, multicellular, asexual buds, which develop in small receptacles called gemma cupsNocated on the thalli. The gemmae become detached from the parent body and germinate to form new individuals. During sexual reproduction, male and female sex
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Question Text
Deficiency symptoms of nitrogen and potassium are visible first in:
Updated OnOct 12, 2022
TopicMineral Nutrition
SubjectBiology
ClassClass 11
Answer TypeText solution:1 Video solution: 2
Upvotes294
Avg. Video Duration3 min