What is the main takeaway message from the story about the wild sunfl.pdf

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What is the main takeaway message from the story about the wild sunflower, Helianthus anomalous? Speciation occurs through punctuated equilibrium Evolution occurs in a slow, steady manner. Hybrids may eventually form new species Speciation often occurs by polyploidy Solution 1. Helianthus anomalus species originated in nature from a hybridization of two other sunflowers. The parental flowers, H,. annuus and H.petiolaris, 2. The parental flowers, H annuus is found in clay based soils while H. petiolaris is found in sandier soils. 3. H. anomalus, is able to inhabit such a different and stressful environment due to divergence in parental gene dominance. 4. A rapid transition is suggested by analysis of pollen fertility in the synthetic hybrid lineages. 5. Rapid speciation may be the rule rather than the exception for recombinational species 6. Fertile, stable, hybrid neospecies have been experimentally synthesized in several plant genera 7. These artificial neospecies are semisterile when crossed with their parental species, indicating that reproductive isolation can arise rapidly. 8. Recombinational speciation represents only one of several known or suspected pathways to rapid speciation. 9. Others include allopolyploidy, changes in mating system, fixation of chromosomal rearrangements, and rapid adaptation to new habitats. 10. Features shared by these mechanisms may facilitate rapid speciation. 11. Both allopolyploidy and recombinational speciation involves hybridization, and rates of recombinational speciation are thought to be enhanced by chromosomal rearrangements, ecological divergence, and a shift to a selfing mating system..

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Find all the square roots of the complex number 14i. Write the square roots in polar (re^i) form, with the smaller angle first. Give angles in degress Solution this is the polar form r(cos()+isin()) we compare it with 1-4i rcos =1 rsin=-4 squaring and adding them r^2(cos^2 +sin^2) = 1 +(-4)^2 r^2 = 1+16 r= sqrt(17) =4.1 tan = -4/1 = arc tan(-4) = -76 degree square root of r(cos()+isin()) is ±r(cos(/2)+isin(/2)). square root form is ±(4.1) (cos(-76/2) + isin(-76/2) ±4.1(cos38 -isin38) in polar form 4.1 e^(-38i).

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Connect onnect mheducation.com/flow/connect.html?isReg true&returnuri; https%3A%2F%2Fconnect.mheducation com%2Fpa C a Search uiz (Lecture 4) Taxonomy is the branch of systemic biology that studies the evolutionary relatedness among groups of organisms. Answer True False Help Solution 2. False Taxonomy is the science of naming, describing and classifying living organisms 3. Presence of a jaw 4. True.

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Consider the following interrupting system. The active-edge inputs on PJ7 and PP7 can occur at any time, including at the same time. The object is to count the number of each type of interrupt. How would you best describe the usage of Count in this system? a) This is a perfectly appropriate usage of Count, because there are two permanently allocated variables with private scope, such that each variable counts the number of interrupts for each ISR. b) There is a critical section bug because of the read/modify/write access to a shared global. c) Because both ISRs share the same Count, the system can not distinguish between a PJ7 and a PP7 interrupt. d) Count is initialized each interrupt, so its value is not the total number. e) The acknowledge statements in the two ISRs are not friendly because they affect all 8 bits of the flag register. f) None of the above is true. void interrupt 24 KeyHanJ (void) ( unsigned short static Count-0; PIFJ = 0x80; // acknowledge Countt count the number of PU7 edges void interrupt 56 KeyHanP (void) ( unsigned short static count=0; PIFP = 0x80; // acknowledge Count++count the number of PP7 edges Solution Looking around, we find ourselves to be surrounded by various types of embedded systems. Be it a digital camera or a mobile phone or a washing machine, all of them has some kind of processor functioning inside it. Associated with each processor is the embedded software. If hardware forms the body of an embedded system, embedded processor acts as the brain, and embedded software forms its soul. It is the embedded software which primarily governs the functioning of embedded systems. During infancy years of microprocessor based systems, programs were developed using assemblers and fused into the EPROMs. There used to be no mechanism to find what the program was doing. LEDs, switches, etc. were used to check correct execution of the program. Some ‘very fortunate’ developers had In-circuit Simulators (ICEs), but they were too costly and were not quite reliable as well. As time progressed, use of microprocessor-specific assembly-only as the programming language reduced and embedded systems moved onto C as the embedded programming language of choice. C is the most widely used programming language for embedded processors/controllers. Assembly is also used but mainly to implement those portions of the code where very high timing accuracy, code size efficiency, etc. are prime requirements. Initially C was developed by Kernighan and Ritchie to fit into the space of 8K and to write (portable) operating systems. Originally it was implemented on UNIX operating systems. As it was intended for operating systems development, it can manipulate memory addresses. Also, it allowed programmers to write very compact codes. This has given it the reputation as the language of choice for hackers too. As assembly language programs are specific to a processor, assembly language didn’t offer portability across systems. To overcome this disadv.

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