In the human respiratory system,where does the actual exchange of gases takes place?
Alveoli
Bronchi
Diaphragm
Trachea
Which chamber of the human heart pumps oxygenated blood out to the rest of the entire body?
Right atrium
Right ventricle
Left atrium
Left ventricle
Which tissue is responsible for transporting water and minerals upwards from the roots to leaves?
Cambium
Stomata
Xylem
Phloem
In genetics,if an organisms has two different alleles for a particular trait,it is said to be?
Homozygous
Recessive
Heterozygous
Haploid
What is the term for a relationship between two organisms where one benefits and the other is neither helped nor harmed?
Parasitism
Predation
Commensalism
Mutualism
Through which specific structures on a leaf does a plant perform gas exchange taking carbon dioxide and releasing oxygen?
Stomata
Xylem
Chloroplast
Phloem
In DNA replications,which nitrogenous base always pair with cytosine?
Guanine
Thymine
Uracil
Adenine
Which organelle is often referred to as the powerhouse of the cell because it generates most of the cells supply of adenosine triphosphate ATP?
Mitochondria
Nucleus
Golgi apparatus
Ribosome
Which process results in two genetically identical daughter cell?
Mitosis
Meiosis
Transcription
Fertilization
What is the primary product of photosynthesis that plants use for food?
Nitrogen
Glucose
Carbon dioxide
Oxygen
