"Founding population arrives, biogeographic isolation occurs, genetic changes occur, reproductive isolation results" (Letter A)
Answer:
Maternal inheritance means the transfer of characters from mothers to offspring through mitochondria. The paternal leakage means some mitochondria transfer from the father as well.
As the information given in the question, the amount of DNA from father's mitochondria is small. The quite small amount of DNA will not affect the conclusions and results that are made by the studies and do not affect the inheritance of mitochondrial DNA.
Answer:
1. Reducing
2. External
Explanation:
The external urinary sphincter, also called as external urethral sphincter consists of skeletal muscles. During micturition reflex, the micturition center present in the brain serves to inhibit the somatic motor neurons by reducing their action potential. These somatic motor neurons innervate in the external urinary sphincter.
Inhibition of somatic motor neurons of the external urinary sphincter results in relaxation of the sphincter to facilitate the act of urination.
Answer:
Answer is D.
Explanation:
Eukaryotic organisms are organisms that possess nucleus and membrane -bound organelles. They derived their name from the word eukaryote, which means true nucleus. They can be single-celled or multi-celled. Examples are fungi, some unicellular organisms, plants and animals.
Prokaryotic organisms are all other organisms that lack membrane -bound organelles and nucleus. Examples are viruses, bacteria and certain algae.
Answer:
A. supplementary motor cortex; premotor cortex
Explanation:
The supplementary motor cortex, also known as the supplementary motor area (SMA), is an area of the cerebral cortex located anterior to the premotor cortex. This area (SMA) is involved in the execution of complex and rapid sequential movements (e.g., typing). Moreover, the premotor cortex is an area of the motor cortex located between the primary motor cortex and the prefrontal cortex. This area (premotor cortex) is activated during motor tasks including, among others, spatial and sensory guidance of movement.
