Earth science i really need with
18. the apparent backward movement of a planet is called
a. heliocentric motion.
b. retrograde motion.
c. eccentricity.
d. kepler's first law of motion.
19. who first introduced the idea that the sun is the center of the universe?
a. nicolaus copernicus
b. johannes kepler
c. albert einstein
d. edwin hubble
20. the four giant gas planets that are made primarily of lightweight elements are
a. venus, saturn, uranus, and neptune.
b. jupiter, saturn, uranus, and neptune.
c. earth, saturn, neptune, and venus.
d. mercury, venus, earth, and neptune.

Which organism is the producer in this food web? 7th grade question. a) arthropods b) birds c) fungi d) plants

Which of the following represents a negatively charged ion? of t 7

Approximately 90% of all cases of polycystic kidney disease are inherited in an autosomal dominant fashion. the disease is typically related to mutations to genes (pkd1 and pkd2). pkd genes can be found on chromosome 16. the disease occurs in approximately 1: 800 to 1: 1000 people. here is a hypothetical example. the dominant allele d will cause the development of pkd. the recessive allele is known as d. what genotypes would correspond to suffering from pkd? dd, dd what genotypes would correspond to being normal (not suffering from pkd)? dd consider that 1: 1,000 people have pkd in your population of 325million. consider that pkd is inherited in an autosomal dominant fashion. show you math for all of the following questions: what is the genotypic frequency for dd? what is the genotypic frequency for dd? what is the genotypic frequency for dd? what is p? what is q? how many people in your population would have pkd?