Fifty percent of the offspring produced by a cross between pea plants have seeds with a wrinkled (r) appearance caused by the presence of a homozygous recessive gene. What were the genotypes of the parents?

Which is an example of an organism? Which is an example of an organism? A. soil B. iceberg C. mold D. a molehill

4. How might similarities and differences in genetic codes, or the proteins built as a result of these codes, be used to determine how closely related different species are?

What is deposition? A. The formation of precipitation with lower pH B. When moisture is evaporated off the leaves of plants C. When moisture mixes with the dust particles in the atmosphere D.

How does X inactivation contribute to an organism's phenotype?

Which part of a seed plant develops into sprem cells?

Forest elephants in Africa have been confirmed as a different species from the larger savanna elephant seen here. Scientists believe the savanna elephant is as different from the forest elephant as Asian elephants are from woolly mammoths.

What competitive processes or forces are ever-present during a star's lifetime?

Which occurs during transcription? A. DNA is copied to create a second DNA strand. B. mRNA codons and tRNA anticodons assemble amino acids. C. DNA is unzipped with the aid of DNA polymerase. D. mRNA is synthesized from a strand of DNA.

In a beach ecosystem, what can limit growth of organisms? A. ocean and rocks B. oxygen C. abundant food source D. moderate temperatures

What process do the arrows for oxygen going in and water coming out represent in the Figure 9-2 diagram of the mitochondria?