What does it mean when a biologist uses the term crossing-over? why is crossing over a good thing?

Why should we conserve biodiversity? Why should we conserve ecosystem?

What is the source of the infection Cyclospora? How did the biological characteristics of the pathogen influence you conclusion?

Where are proteins made in cell

A plant is starting to fall over because the plant can no longer support it's own weight. Students want to find out why this is happening. Which of the fallowing is a good hypothesis for their experiment? A.

What happens to waters density and volume when it freezes

Nucleotide are composed of phosphate group, a sugar, and a nitrogenous base. DNA is made up of long strands of nucleotide. which part if the above molecule can differ between nucleotide? A. the sugar B. the phosphate group C. the nitrogen group D.

What organ system detects stimuli, secretes chemical and electrical signals, and controls all other organs

Which tissue type allows for organ movement within the body

Explain the role of enzymes and how they affect the chemical reactions of living things

Many arthropods young do not look like adults and do not eat the same food as adults. how would this be an advantage in an environment where food is scarce