The homo erectus is the most common ancestor with modern humans
Answer:
Option C. As microscopes became more powerful, scientists could see additional structures and functions within the cell.
Explanation:
Light microscope is also called optical microscope which is used to see very small objects which can't be seen through naked eyes. The magnification power of light microscope is 1000x which means light microscope show the object 1000 times greater than its original size. Due to this magnification power, scientists are able to see many new features of the cell which cannot be seen with ordinary microscope.
The sympathetic nervous system releases two hormones within the body in response to stress, resulting in an adrenaline rush or a sense of urgency that occurs during stressful conditions. These hormones are called epinephrine. So it releases hormones to give you adrenaline in a bad situation or stressful one
Answer:
The correct answer is a. absent spinal reflexes below the level of injury.
Explanation:
Spinal shock strictly refers to the neurological condition that occurs immediately after a spinal cord injury, in which the loss of not only motor and sensory functions occurs, but also the abolition of all reflexes below the injury (reflexes of muscular or myotatic stretching and cutaneous reflexes). There is also flaccidity, loss of reflexes. It is characterized by hypotension associated with cervical or upper thoracic spinal injuries. This characteristic shock results from the lesion of the descending sympathetic pathway in the spinal cord, producing a loss of vasomotor tone and sympathetic innervation of the heart. This causes vasodilation of the affected area with accumulation of blood and a decrease in venous return to the heart as well as cardiac output.
Answer:
1 and 4
Explanation:
Streptobacilli are linked together in chains, the bacterium is gram positive and the generally rod-shape. The genus could be aerobic ( required oxygen for their growth), falcultative anaerobe (in the absence of oxygen, they can switch to fermentation).
