Which of the following occurs

while homologous chromosomes

are paired up?

A. They create 2 haploid cells.

B. They contain 6 chromatids.

C. They exchange portions of their DNA.

D. They produce two diploid cells.

Which organs of the digestive tract lack digestive enzymes?

In simplest form what is RNA and how is it different from DNA?

Which is the best evidence that two species have a common ancestor? A:The two species have the same diet. B:The two species live in the same habitat. C:The two species' skeletal structures are 90% identical.

Which of these items would be a renewable resource? A) fish B) gold C) oil D) gasoline

Why Sexually transmitted Infection are more readily passed from male to female

The lowest level of environmental complexity that includes both living and nonliving factors is the A: Biome B: Community C: Ecosystem D: Biosphere

Which part of the endocrine system is located in the middle of the brain

Suppose a tropical storm hit your local coastal areas. Residents noticed a large amount of dead fish washed up on the beach following the storm. What physical factors of the aquatic ecosystem may have caused the fish die off?

A scientist describe to study the effect of salt on a particular type of bacteria. Arrange the steps Of the scientific method in the correct order to show how the scientist would proceed with his work

How is a new species or group of species represented in the scientist's model?