In order for natural selection to occur which conditions are necessary?

A. No mutations

B. each organism born must survive

C. no variation

D. more born than can survive

The Endangered Species Act___. A provides federal funds to pay for captive breeding programs B provides protection for habitats of endangered species C provides trade-in products from endangered or threatened species D is an important International

When a piece of zucchini is soaked in salt water, the zucchini breaks down and loses its firmness. Which best explains what happened

One disadvantage to experimental research is that experimental conditions do not always reflect reality. true or false

All natural resources are used for energy. True or False?

A neuroscientist records neuronal firing from hillary's retina and notices that her m-cones and l-cones are both firing at an equal rate. From this, hillary is probably looking at a:

The type of liquid is the

Why is the cell called the basic living unit of all living matter?

True or False All algae have roots, stems, and leaves.

How would a houseplant respond to sunlight that comes from one direction? A. by curling its stem around its leaves B. by closing its leaves at night C. by growing roots downward through the soil D. by bending its stem toward the sun

Hershey and chase used a dna-based virus for their work. How might the results have been different if they had used an rna virus?