As gene is to needle.
Explanation
There is a direct relationship as a gene is a part of a chromosome. Every chromosome contains many genes with each gene coding for a specific protein. A chromosome is a long strand of DNA and genes are arranged in a single series along a chromosome. Genes are present in the chromosomes and work as functional units of chromosomes. Genes are responsible for cell function and play a very important role as genes are segments of DNA.
B) comparative morphology is correct
Answer:
The correct answer is option B, lower than the threshold velocity for sand
Explanation:
Threshold velocity of the soil is the velocity where soil has overcome the gravitational force and the inter particle force and it starts moving. The factors which affect the threshold velocity of soil are –
a) Lower the sand content , higher will be the threshold velocity
b) Size of aggregates in the soil – the larger the size of the aggregate the larger will be its velocity
c) Size of soil particles – soils with soil particle size greater than 1 mm shall move easily.
Considering all the above three factors, it is clear that the threshold velocity of silt is lower than that of sand as the sand content in silt is high and also its particles are finer than that of sand particles.
The statement that is not true of greenhouse gases is :
They are produced solely by human activities
Human activities such as: using hairspray, creating pollution, etc are worsened the condition of the greenhouse effect, it exists even before we did those things.
Explanation:
Emissions of gases by humans began to rise dramatically because of the economic Revolution and changes in land use. Several greenhouse gas emitting activities area unit currently essential to the worldwide economy and a elementary a part of trendy life.
Carbon dioxide from the burning of fossil fuels is that the largest single supply of gas emissions from human activities.
Though humans are the main cause of greenhouse effect.