In order for speciation to occur, organisms can no longer interbreed. This is known as

How many strands make up a dna double helix?

What happens during the migration step? Seeds or spores reach a barren area carried by the wind. The migrated species prevail in the conditions in that area. The established life forms reproduce to increase the population. All of the choices

How does the egg of a flower become fertilized? 1 answer, not multiple choice. as soon as the pollen reaches the stigma after the pollen grain descends down the style when the pollen tube grows into the ovule when the seed germinates

The goal of basic science is: a. to use technology to improve quality of life b. to solve a particular problem. c. to improve a specific situation d. to increase our understanding of general principles

Vascular plants, such as ferns, trees, and flowering plants, have specialized tissue known as vascular tissue. The function of vascular tissue is to A. control movement. B. sexually reproduce. C. transport materials. D. produce energy.

Distinguish between compact and spongy bone based on appearance, location, and function.

A young farmer purchases some land in a relatively arid area and is interested in earning a reasonable profit for many years.

What type of wave moves audio and visual signals to your television? carrier waves transducer waves cable waves

Which object in the Solar System is essentially stationary relative to all the other objects in the Solar System? A. the Earth B. the Sun C. the Moon D. an asteroid

Wetlands are important because they provide filters for pollution and they provide a habitat for many animals. true or false? (ik this is earth science)