Is human body or a cell close or open system?

The small paired structures at the base of the penis that secrete a thick is called

Describe the pathway of an unfertilized egg as it travels through the femal reproductive system. Explain the function of each reproductive organ through which it travels.

Gregor Mendel's research formed the basis of the field of genetics. dominance. recessiveness. selective breeding.

Unlike prokaryotic cells, eukaryotic cells have the capacity to A) assemble into multi-cellular organisms B) establish symbiotic relationships with other organisms C) obtain energy from the Sun D) store genetic information in the form of DNA

A scientist is studying a population of frogs in a pond. One day, copious amounts of pesticides are mistakenly released into the pond, killing off the majority of frogs (leaving only a few survivors).

Clouds have many effect, such as

A woman with ab blood type and a man with blood type o have three children, one of whom is adopted. the blood types of the children are a, b, and o. what is the blood type of the adopted child?

Explain why the prokaryote/eukaryote dividing line represents a fundamental division among organisms.

Without selective breeding, dogs today would probably have a greater number of differences. T or F

What does haploid me? What type of cells are haploid? What is the haploid number for humans?