A heterozygous organism has

1. three different alleles for a trait

2. Two identical alleles for a trait

3. Only one allele for a trait

4. Two different alleles for a trait

When comparing lakes and oceans, most lakes have A) lower levels of salt. B) higher levels of salt. C) inconsistent levels of salt. D) about the same level of salt.

How does an H-R diagram relate to a star's temperature to A. The amount of heat created by the star B. The elements that the star contains C. The type of star D. The star's absolute magnitude

Why are scientific names important? Give four functions for scientific names

What is the texture and consistency of the dna? 2. why did we use a salt in the extraction solution? 3. is the dna soluble in the aqueous solution or alcohol? 4. what else might be in the ethanol/aqueous interface? how could you eliminate this? 5.

The main reason we aren't using more wind mills is because they have been known to kill birds. A.) True B.) False

Which characteristic of the male reproductive system is not variable among animal species that reproduce sexually?

Why the children in a family may have different genotype and phenotype than predicted by the punnet squre

What is meant by the term "chemically gated sodium channel"? Group of answer choices A membrane channel that opens when some chemical binds to it, allowing sodium to cross the cell membrane A membrane channel that opens when sodium binds to it,

Scientists now know how much carbon dioxide was present in the atmosphere as far back as 800,000 years ago. How did they obtain this data?

How do farmers contribute to water pollution?