Answer:
By designing an experiment where the temperature on the thermometer is measured after a chosen (same) time interval when the thermometer is wrapped with the different materials and placed in the freezer
Explanation:
Experimental design
Materials given: freezer, a thermometer, samples of materials
setup:
1. The freezer is put on and made to remain at a particular temperature, mimicking the winter season.
2. Next, different materials for the coat design with equal dimensions are used to rap the thermometer whose initial temperature has been recorded in the same pattern and the thermometer is placed in the freezer and left for a certain time, which is made constant for the different materials.
3. after the time, the final temperature on the thermometer is recorded.
Result interpretation
The temperature is expected to drop after the time in the freezer, but the material with the smaller change (drop) in temperature indicates that it traps more heat hence is the best material for designing a winter coat
independent variables: type of material used
dependent variables: temperature on the thermometer
control variables: time, dimensions of materials, temperature of freezer, pattern of wrapping.
Answer: Passive diffusion or facilitated transport.
Answer: Option 'C' is correct.
Explanation:
Every cells change with ageing.
As cell age they tend to become larger and as the body ages it tends to have fewer cell dividing.
As the age of cells increases, cells become less able to divide and multiply.
Due to which when an middle aged or old aged person get wounded, their healing takes so much of time as compare to child because new cells do not develop easily in old age people. It takes time to develop new cell to heal their wound.
Hence, option 'C' is correct.
The smaller veins in the leaf connect to the <u>margin </u>of the leaf.
<u>Explanation:</u>
The structural and important part of the plant is the leaf. The leaf is the main source of photosynthesis. The leaf has small vein like structures to carry the prepared food and energy sources to be distributed throughout the plant.
The smaller veins in a netted pattern run across the leaves to meet the margin of the leaf. The veins run laterally from the midrib to the margins hence providing a proper network and hence passing of the nutrients made feasible in an accommodative way.
<span>Eukaryotic cells contain membrane-bound organelles, such as the nucleus, while prokaryotic cells do not. Differences in cellular structure of prokaryotes and eukaryotes include the presence of mitochondria and chloroplasts, the cell wall, and the structure of chromosomal DNA.</span>
