trial assessment

How are water molecules bound to each other?

• Adhesion

• Covalent bonds

• Hydrogen bonds

• Ionic bonds

Tags

NGSS.HS-ESS2-5

Water is an important medium for life, but lipids do not dissolve in water. Think, what 3 types of interactions between molecules and water/lipids are represented in nature.

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Which components are not present in DNA?

• Nitrogenous bases

• Ribose

• Phosphate groups

• Deoxyribose

• Uracil

How many codons (triplets of nucleotides) may be presented in DNA? Calculate the maximal amount.

Select all correct statements regarding the origins of cells and early evolution on Earth.

• The first cells likely appeared in an environment with a high concentration of oxygen.

• Organic molecules could have formed from inorganic compounds.

• Simple molecules could combine into more complex compounds under early Earth conditions.

• Symbiosis between ancient prokaryotes might have led to the emergence of eukaryotic cells.

• The first living organisms were multicellular.

Tags

NGSS.HS-LS4-1

NGSS.HS-LS4-2

List the known hypotheses about the origin of life on Earth and briefly describe each.

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Choose the structures that can be found in plant cells:

• Cellulose cell wall

• Mitochondrion

• Cell membrane

• Large vacuole filled with cell cap

• Murein cell wall