What do plants need to make chlorophyll

Why were the results with just water so much different than the trials with the detergent?

Which medical advancements are possible using adult and embryonic stem cells

A new plant species is introduced to daphne major and produces small, thin seeds. this plant species is highly adapted to drought and after 5 years has replaced over 80% of the native plants that produce large seeds.

If someone got sick with an intestinal infection from eating the yogurt, what type of antibiotics would you prescribe? Why?

How do you calculate how much energy is transferred from one trophies level to the next

What is the period during the cardiac cycle when the ventricles are completely closed and blood volume in them remains constant as the ventricles contract?

Forest elephants in Africa have been confirmed as a different species from the larger savanna elephant seen here. Scientists believe the savanna elephant is as different from the forest elephant as Asian elephants are from woolly mammoths.

What competitive processes or forces are ever-present during a star's lifetime?

Which occurs during transcription? A. DNA is copied to create a second DNA strand. B. mRNA codons and tRNA anticodons assemble amino acids. C. DNA is unzipped with the aid of DNA polymerase. D. mRNA is synthesized from a strand of DNA.

In a beach ecosystem, what can limit growth of organisms? A. ocean and rocks B. oxygen C. abundant food source D. moderate temperatures