Remarkably, biologists are able to extract DNA from fragments of ancient Neanderthal bone and sequence Neanderthal DNA. Biologists are also able to come up with an accurate age of the remains. Some of these remains are as recent as 28,000 years old. What of the below is true about how they age the remains?

a. All of these
b. By extrapolating the half-life of Carbon-14 to estimate how much time the ratio of Carbon-14 to standard carbon took reach the present value in the bone
c. By measuring the amount of Carbon-14 present in the bone
d. By comparing the ratio of Carbon-14 to standard Carbon in the bone

What is the relationship between absorbance of light and the rate of photosynthesis?

Lucia is walking barefoot in her yard. she accidentally steps on a nail. how will her nervous system work to generate a reaction? arrange the eventschronologically.

Can someone pretty me with this ? it’s urgent. compare the three theories of emotion. here are the three theories of emotion. cannon-bard theory of emotion: the belief that both psychological arousal and emotional experience are produced stimultaneously ( at the same time) by the same nerve stimulus. james-lange theory of emotion: the belief that emotional experience is a reaction to bodily events occurring as a result of an external situation. ( “ i feel sad because i am crying.) schachter-singer theory of emotion: the belief that emotions are jointly determined by a nonspecific kind of psychological (bodily function) arousal and its interpretation, based on environmental ( natural surroundings) cues. which of these theories makes most sense to you? why. your response should be written using proper english spelling and grammar. and it needs to be 10 complete sentences.