Which of the following events happens first in the development of a new organism?

A. A zygote undergoes mitosis.

B. A sperm fertilizes an egg to form a zygote.

C. A blastocyst implants into the uterine wall.

D. A morula is formed.

What system is made up of the nose, pharynx, trachea, lungs, bronchi, and alveoli. circulatory endocrine immune respiratory

When earthworms bring fine rock particles to the surface what type of weathering is that?

Which of the following statements shows an example of operant conditioning? A.) A chicken learns that if it pecks on a button, a food pellet will be released into its cage. B.) Pavlov taught a dog to salivate every time it heard a bell. C.

If you were to use an adult cell's nucleus with intact DNA from a Tasmanian tiger to replace the nucleus of a Tasmanian devil's egg cell and make it produce to a new organism in a surrogate Tasmanian devils womb, what kind of organism will it make?

Where would the origin of endothermy map on the phylogeny?

When dust and ash particles from a volcanic eruption block out sunlight and reduce solar radiation, earth experiences the. This results in temporary climate cooling

Which of Jupiter's moons is volcanically active? Io Ganymede Europa Callisto

Risk assessment depends on

DNA is genetic material that makes up living things, and folic acid plays an important role in the formation of DNA. Jon wants to study the effect of folic acid on DNA formation in microbes.

Your alien friend from planet Xenon is visiting and wants to learn how to breed pea plants. You show your friend a recent batch of pea plants with purple flowers that you grew by crossing plants that had purple flowers with plants that had white