Which of the following is most likely to decrease biodiversity? Protecting more land from future housing developments

Reintroducing natural predators to an area

Clearing a forest to raise livestock for a nearby town

Adding native plants to a suburban garden

In the Kelp forest ecosystem, sea urchins eat kelp, and sea otters eat sea urchins.

What is the role of sea urchins in this ecosystem?

primary consumers

secondary consumers

primary producers

producers

What is the correct order of energy flow in an ecosystem?

sun → grass → rabbit

sun → rabbit → grass

fox → rabbit → grass

sun → fox → rabbit

A savannah ecosystem includes grasses, zebras, and lions, and elephants.

Which of the following has the greatest overall biomass in this ecosystem?

grasses

lions

zebras

elephants

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?