Which of the reproductive isolating mechanisms given below is postzygotic?

A (Hybrids form but are sterile.

B (The mating season is different.

C (Flowers are pollinated by different insects.

An ecologist is constructing a food web of a grassland ecosystem. if she wants to include decomposers, what arrows would she need to add?

In humans, what is true of the cells that are produced as a result of meiosis? a. they contain the same amount of genetic information as their parent cell. b. the cells have 2 copies of each homologous chromosome c.

What isThe only tissue in your body that is able to contract or shorten

Electrophoresis separates DNA fragments of different sizes, but this technique does not indicate which of the fragments contains the DNA piece of interest. This problem is solved by Group of answer choices

What is the basic building block of complex organisms?

Suppose you are investigating how the diet of hamsters affects how much they run on their hamster wheel. In order to control the experiment, which of these should you do? A. Change only the diet of each hamster. B.

Which is an example of population density? a. country with a large population b. a maximum number of wolves in a forest c. the total number of alligators in Florida d. two jaguars per thousand hectares

In what ways do you think a virus can access your body?

What is a DNAfingerprint used for

What did schleiden and schwann conclude about cells?