Regulation by gradients of paracrine factor concentration was elegantly demonstrated by the specification of different mesodermal cell types in the frog Xenopus laevis by activin, a paracrine factor of the TGF-beta family. Which of the following observations are correct from this graph?

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#Question id: 24589

#Unit 2. Cellular Organization

The severity of the thalassemias disease depends on the individual deletion a- or b-globin genes, which deletion will show the maximum severity

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#Question id: 10553

#Unit 6. System Physiology – Plant

Cell walls allow plant cells to build up large internal hydrostatic pressures called

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#Question id: 28707

#Unit 2. Cellular Organization

Which of the following is a major site of carbohydrate synthesis?

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#Question id: 24461

#Unit 7. System Physiology – Animal

An 11-year-old male was having difficulty reading the graphs that his teacher was showing at the front of classroom. His teacher recommended he be seen by an ophthalmologist. Not only was he asked to look at a Snellen letter chart for visual acuity but he was also asked to identify numbers in an Ishihara chart. He responded that he merely saw a bunch of dots. Abnormal color vision is 20 times more  common in men than women because most cases are caused by an abnormal

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#Question id: 3616

#Unit 8. Inheritance Biology

If the parents are AO and BO genotypes for the ABO blood group, their children could include which of the following genotypes?