Can someone help me please

Explain what a zygote is. use the terms egg cell, sperm cell, and fertilization in your explanation.

Match the following terms and definitions. 1. species that are adapted to live in equilibrium at carrying capacity population density 2. population growth that reaches equilibrium and carrying capacity population 3. death rate mortality 4. birth rate k-selected 5. a group of interacting individuals of the same species within the same geographic area natality 6. the number of organisms living in a particular area logistic growth

What are the three different shapes, or structures, of carbon-based molecules