What kind of galaxy has arms of gas and dust?

elliptical galaxy

spiral galaxy

irregular galaxy

bar galaxy

In the 1950s, when Watson and Crick were working on their model of DNA, which concepts were well accepted by the scientific community? Select all that apply. (a) - Genes are made of DNA. (b) - Chromosomes are made up of protein and nucleic acid.

During which phase of the cell cycle does dna duplication

Wich is an, example of bottleneck effect

Why arent climax communities the same anywhere on earth?

Which of the following are characteristics of generalist species? a. small habitat and restricted diet b. large habitat and varied diet c. restricted diet and physiological adaptations d. behavioral and physiological adaptations

Do you agree with this statement? Single-celled organisms are very simple creatures Why or Why noy?

What is the main purpose of sustainable agriculture? A. To feed a growing world without damaging the ecosystem B. To produce cheap and abundant food at a high cost C. To increase farming efficiency and profits D.

How is the United Kingdom planning to use driverless cars beginning in 2015?

Is selection more effective against recessive alleles in haploid or diploid organisms?

Why are lipids and proteins free to move laterally in membranes?