(PUC-PR) No início da década de 70, dois cientistas (Singer e Nicholson) esclareceram definitivamente como é a estrutura das membranas celulares, propondo o modelo denominado de mosaico fluído. Nesse conceito, todas as membranas presentes nas células animais e vegetais são constituídas basicamente pelos seguintes componentes: 1 ponto a) ácidos nucleicos e proteínas; b) ácidos nucleicos e enzimas; c) lipídios e enzimas; d) enzimas e glicídios; e) lipídios e proteínas.

Me brainliest 1. what does a red shift mean? blue shift? 2. describe the big bang theory. according to this theory, how old is the universe? 3. scientists believe the universe is expanding. what is the evidence that supports this? 4. describe a nebula.5. describe the 3 types of galaxies. what is a barred spiral galaxy? 6. what is a light year? how far is alpha centauri from earth? 7. describe the universal law of gravitation. be sure to include gravitational force between two objects.8. describe the planets’ orbits around the sun.9. what is the asteroid belt? where is it located? 10. describe rotation and revolution of earth. what determines an earth day and year? 11. how do galaxies exist? 12. compare and contrast the inner and outer planets.13. what causes the seasons?

Consider the venn diagram of plant reproduction. where in this image, areas a - d, would you insert the picture of the orange lily?

Which of the following molecules will diffuse most quickly across a lipid bilayer membrane? a. h2o b. o2 c. h2po4 d. glucose e. na+