What is the difference between an organism's habitat and its ecological niche?

How does crossing over, the distribution of random mixes of homologous chromosomes into gametes, and fertilization all contribute to variation in the traits of offspring?

Which of the following is an example of density? A ice floating on top of a river B Convention currents that cause wind C Oil spill cleanup D all the above What type of property is density?

Which of the following is a chain smoker likely to develop? select one of the options below as your answer: a. hepatitis b. lung cancer c. blood cancerb. lung cancer is a desease a chain smoker most likely to develop?

A group of scientists examined a meteorite from Mars and found a carbon-rich substance that is produced when microorganisms decay. They concluded that the meteorite provided evidence there was once life on Mars. Why is this an emerging idea?

Liverworts, hornworts, and mosses are grouped together as the bryophytes. besides not having vascular tissue, what do they all have in common?

Rock made of shells and coral cemented together

Hemoglobin is A. a digestive enzyme. B. a tiny nutrient carried in capillaries. C. an oxygen-carrying pigment in blood. D. part of the vertebrate nervous system.

What is needed for DNA replication? Select all that apply.

In which process is a zygote formed in a plant from the joining of a sperm and an egg? fertilization pollination seed dispersal vascular transport

How does anthracite form?