Why is genetic variation within a population essential for evolution?

An overabundance of nitrogen in bodies of water causes algae to overgrow, leading to the death of fish. Which characteristic of nitrogen causes this problem? A. Nitrogen causes producers to grow. B. Nitrogen increases the salinity of water. C.

How do exhaust fumes affect the environment

Why are fewer animal species in grasslands a. grasslands have fewer habitats b. temperatures in grasslands vary more c. rainfall is low in grasslands d. the amount of solar energy is high in grasslands?

Which of statements is/are true for sexual reproduction in plants? 1. plants are obtained from seeds 2. two plants are always essential 3. only insects are agents of pollination 4. Fertilization can occur only after pollination

Where do the two chains of nucleotides bond to each other

Increased production of goods makes our lives more comfortable, but causes an increase in the demand for energy and other resources. One negative impact of this situation on ecosystems is an increase in

One of the most common causes of pneumonia is Streptococcus pneumoniae, a gram-positive bacterium. Surrounding the bacterium is a thick structural component layer known as a capsule.

What determines which of the two dna strands will serve as the template during transcription?

Which is a type of muscle that powers the cardiovascular system? A. Skeletal muscle B. Cardiac muscle C. Cartilage muscle D. Smooth muscle

To investigate how the sex of an offspring is determined