Answer:
Explanation:
The hox gene provides a huge amount of important information about evolution. Hox genes duplication made increased morphological complexity possible triggering the formation of neural crest cells and allowed them to disperse throughout the body, forming a variety of structures. They help lay out the basic body forms of many animals including humans, flies and worms.
Answer:
True
Explanation:
The sympathetic autonomic nervous system activates the body for hormonal or neuronal responses also known as fight- or - flight response, For example during an fire emergency and there is a need to run. The response occurs primarily by via impulses transmitted through the sympathetic nervous system, and also secondarily through catecholamines secreted from the adrenal medulla.
Although the sympathetic autonomic nervous system is activated in stressful conditions, it needs to be constantly active even at a basal level to maintain homeostasis.
Physical ......................................................
The correct answer is that "<span> a process that occurs as a result of differences in reproductive fitness".
Evolution is best described as the </span>alternate within the<span> heritable </span>characteristics<span> of </span>biological<span> populations over successive generations. Evolutionary </span>procedures provide upward thrust<span> to biodiversity at </span>every degree<span> of </span>biological organisation<span>, </span>together with<span> the </span>ranges<span> of species, </span>character<span> organisms, and molecules.</span>
Answer: very small amounts are easier to express as ppm.
Explanation: 1 ppm = 0.0001 %
