Unlike a eukaryotic cell, a prokaryotic cell lacks A
DNA and cytoplasm.
B
a cell wall and cell membrane.
C
ribosomes and energy-propelled flagella.
D
a nucleus and membrane-bound organelles.

Many farmers prefer cattle without horns because it is safer for their herds. the allele for no horns (n) is dominant to the allele for the presence of horns (n). a farmer mates a male with horns to a heterozygous female without horns. what is the chance that the offspring will have horns?

Babies with very low or very high birth weight are less likely to survive. observe a graph of the data.

The serengeti plains are part of the african savanna ecosystem and are home to a variety of different species of plants and animals. the serengeti plains experience a seven-month period of seasonal drought each year, during which the ecosystem receives only four inches of rain and the availability of some resources becomes very scarce. which type of limiting factors does the seasonal drought in the serengeti plains affect?