R-selected species often experience EXPONENTIAL growth in population, giving a J-SHAPED curve on a graph.
R-selected species are those that have high growth rate. These species may produce many offspring but not all will survive into adulthood.
Answer:
d)A...B...C
Explanation:
Hormones are chemical proteinous substances secreted in one location and transported to another location, in order to bring about a physiological effect. Hormones are secreted by endocrine glands which collectively makes up the endocrine system. Endocrine glands include testes, ovary, pancreas, thyroid, adrenal gland etc. A hormone is usually secreted when a change needs to be effected in a target cell.
What happens is that, when a particular physiological effect is needed by a target cell e.g growth, development, homeostasis, repair etc., it sends a negative feedback to the gland that is responsible for the secretion of the specific hormone. The particular endocrine gland, then, secretes the hormone into the bloodstream (ductless), which carries it for absorption by the target cell where it is needed.
The cochlea contains organ of cortis which send(s) messages through the auditory nerve to the areas of the brain that are responsible for interpreting auditory information. The Organ of cortis contains the hair cells and nerve receptors for hearing. When the hair cells has been stimulated, it will react to specific sound frequencies. However, only certain hair cells will be stimulated based on the pitch of the sound. The signals produced by the hair cells will turn into nerve impulses which will be sent out by the cochlear portion of the auditory nerve into the brain. This auditory nerve will carry the impulses from cochlea into the mid-brain which is the cochlear nucleus. On other brain pathways that end in the auditory cortex of the brain these nerve impulses were carried.
Answer: DiGeorge syndrome (DGS)
Explanation: It is caused by abnormal development of certain cells during fetal development.
It is a primary immunodeficiency disorder caused by the mutation in chromosome number 22.
A biochemical mechanism in plants/ chlorophyll absorbs light energy for photosynthesis.
