Toxic substances such as alcohol and nicotine that cross the placenta and may result in birth defects are called

The answer is Teratogen.

Explanation:

It is defined as any physical, chemical or biological substance, which is capable of producing an attraction in normal embryonic development, always causing congenital malformations in the child. Teratogenic agents are substances that cross the placental barrier and damage the fetus that grows inside it. Teratogenic agents do not work the same in all women. Influence the exposure time and the dose of harmful effect. It also depends on the trimester in which the pregnancy is found.

velocity and height

i think the answer is g1

hope i

-lavira: )