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