Which statement best explains why large predators, such as lions and leopards, are common in savanna grasslands, but are mostly absent from desert ecosystems?

a. there is not enough biomass at lower levels of the food chain in deserts for large predators to be supported.
b. biomass is passed through the food chain at a much higher rate of efficiency in grasslands, allowing large predators to exist.
c. there are no scavengers in deserts, but many in savannas, and this allows materials to cycle fast enough to support predators.
d. the 10% rule states that predators must make up 10% of the animals in ecosystems with a lot of biomass, like savanna ecosystems.

In a hypothetical breed of dogs, coat color is controlled by two genes. there are six different coat colors in this breed: black, brown, cream, gray, silver, and tan. consider the following crosses.cross 1: black females from a lineage of all black dogs are crossed with brown males from a lineage of all brown dogs. f1 males and females are all black. when f1 are intercrossed, f2 males and females are black or brown.cross 2: black females from a lineage of all black dogs are crossed with tan males from a lineage where all males are tan and all females are cream. f1 males are black, f1 females are gray. when f1 are intercrossed, f2 males and females are black, brown, gray, or tan.cross 3: silver females from a lineage where all females are silver and all males are gray are crossed with brown males from a lineage of all brown dogs. f1 males and females are all gray. when f1 are intercrossed, f2 males are black, brown, gray, or tan, f2 females are cream, gray, silver, or tan.select the correct statements regarding the mode of inheritance of the coat color genes.a) both genes are x-linked.b) both genes are autosomal.c) one of the genes modifies the expression of the other gene.d) each gene has an additive effect on the intensity of coat color.e) each gene independently specifies three colors.f) one of the genes is autosomal, and the other is x-linked.

Coral reefs support more species per unit area than any other marine environment on earth. what is one way coral reefs are important to the health of the biosphere

During convection, less dense fluid rises and denser fluid sinks.