Spermatozoa and ovum are specialized cells that contain half the number of chromosomes from both parents. The spermatozoa and ovum combine chromosomes to create a fertilized egg with a full set of chromosomes. Which process creates spermatozoa and ovum?

cell differentiation

cell growth

meiosis

mitosis

What are two ways in which waves erode the land?

Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.

Which particle controls what element an atom is?