Answer:
The evolution of the peppered moth is an evolutionary instance of directional colour change in the moth population as a consequence of air pollution during the Industrial Revolution. ... Later, when pollution was reduced, the light-coloured form again predominated.
Answer:
A-Band
Explanation:
Sarcomere is the basic unit of skeletal muscle and shows various striations under the microscope.
Anisotropic band or A-Band is the portion of sarcomere that contains both the thick and thin filaments . A-Band appaers dark under the microscope. Thick filaments are consist of actin and thin filaments consists of myosin.
I-Band contains only thin filaments of myosin. H- zone contains only thick filaments and no thin filament. Sarcomere is the unit of a skeletal muscle. Synapse is the junction between two neurons.
Thus, the correct answer is option (A).
One is optamistic feedback and another is pesimistic.
The correct answer is option a plant that has only two alleles for a trait.
In order to perform the Mendel's experiment, the conditions should be similar to the Mendel's actual experiment. The Mendel experiments shows the presence of two alleles controlling a single trait. So, in order to study the plant as the Mendel did, the person should choose a plant which have two alleles for a particular trait.
The plant must be able to self and cross pollinate in order to study the Mendelian characteristics accurately. IF a plant carry only recessive allele, then the effect of the dominant allele cannot be studied, so, the plant carrying only recessive allele should not be studied. Studying three allele coding for the same trait would be difficult to study the Mendelian characters, so, this plants should not be examined to study Mendel's experiment.
