The answer is A. photoperiodism.
Photoperiodism is an organism reaction to the lengths of days and nights. Some plants require longer days, and some require shorter days. By changing the lengths of days and nights, commercial plant growers are able to increase plants productivity.
Tropism is plant growth in a response to a stimulus.
As it name suggests, <em>photo</em>tropism is plant growth in a response to light.
<em>Gravi</em>tropism is plant growth in a response to gravity.
Thigmotropism is plant growth in a response to contact
Answer: The correct answer is A)
According to the binomial nomenclature, two terms are used for giving a scientific name to an organism belonging to a particular species. In this nomenclature, first term depicts the Genus and the second term depicts the species to which that organism belongs to.
As per the scientific names, Lion, Tiger, and Leopard belong to the same genus that is Panthera.
Thus, A) is the right answer.
The answer is D. multiple alleles
As discussed in Unit 10 of The Physics Classroom Tutorial, electromagnetic waves are waves that are capable of traveling through a vacuum. Unlike mechanical waves that require a medium in order to transport their energy, electromagnetic waves are capable of transporting energy through the vacuum of outer space. Electromagnetic waves are produced by a vibrating electric charge and as such, they consist of both an electric and a magnetic component. The precise nature of such electromagnetic waves is not discussed in The Physics Classroom Tutorial. Nonetheless, there are a variety of statements that can be made about such waves.