What do closely spaced contour lines on a topographic map indicate?

Are responsible for the structures and functions of organisms.

The theory of plate tectonics explains how some coastal mountain ranges may have been formed. True False

A child has sickle-cell disease (ss) but neither parent is ill. What must be true of her parents' genotypes? One parent has two recessive alleles. Both parents are heterozygous carriers. The father is heterozygous; the mother is normal.

In two communities of similar size and age structure (A and B) there were outbreaks of viral illness (virus A in community A and virus B in community B), both of which were traced back to a single source.

How you know the tomato comes from a flowering plant?

The Kobe habor wharfs where the center of Japanese exports to other countries. It had 200 wharfs before the earthquake. How many wharfs remained undamaged after the earthquake? A. 130 wharfts B. 3 wharfs C. 30 wharfs

How do the pollutants that cause acid rain get into the air?

Hunters kill all of the wolves in a region. The wolves mostly ate deer. Why might there be fewer deer a few years after the wolves are killed?

Normal chlorophyll development in plants requires the presenceof at least one dominant allele at gene A and at least one dominantallele at gene B. Double homozygous recessive plants (a b / ab) lack chlorophyll and are white.

Onion cell and elodea cell