Wood tends to be hard and relatively inflexible, especially when it's beendried. This is why wood is an excellent building material. Is this a chemical or physical property explain.

The soviet union beat the us to the first successful launch, with the october 4, 1957, orbiting of sputnik 1, and later beat the us to have the first human in earth orbit, yuri gagarin, on april 12, 1961. the "race" peaked with the july 20, 1969, us landing of the first humans on the moon with apollo 11

Humans can affect weathering and erosion in several ways.  humans cause  increases in acid rain and pollution, which increase the amount of  weathering  agents in the air and water, and then on land.for an easy answer: 1) acid rain2) pollution

Homologous chromosomes with heterozygous alleles d) heterozygous chromosomes with homozygous alleles