Density is mass per unit of volume. which pair of lab instruments would a student use to measure the density of seawater?

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?

The specific heat of ice is 0.5 calories/gram°c. 20 grams of ice will require ll calories to raise the temperature 1°c. 05

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?