Answer:
1. Increase
2. Decrease
Explanation:
During inspiration, diaphragm contracts and lowers down. There is a simultaneous contraction of external intercostal muscles and movement of rib-cage upward and outward. All these events lead to an increase in the volume of the thoracic cavity. Increase in volume of the thoracic cavity results in expansion of lungs and lowering down the air pressure within alveoli of lungs.
Answer:
2.ln the analysis you calculate heart rate average over 15 second and instaneous
Answer:
Postzygotic reproductive barriers
Explanation:
Post-zygotic reproductive barriers are the adaptations developed in the organism which occur after the zygote (fertilization product) has been formed.
The Post-zygotic barrier involves the hybrid inviability which refers to the reduction on the viability of the offspring and hybrid sterility or that is the production of the fertile reproductive barriers.
The production of mule by the mating of horse and donkey results in the infertile mule which is considered the mechanism of the post-zygotic barrier.
Thus, Postzygotic reproductive barriers are the correct answer.
Answer:
When meteoroids enter Earth's atmosphere (or that of another planet, like Mars) at high speed and burn up, the fireballs or “shooting stars” are called meteors. When a meteoroid survives a trip through the atmosphere and hits the ground, it's called a meteorite.
Stem cell research has many potential future uses. Communication is vital because:
1) Through worldwide collaboration, progress is faster
2) Ethical issues may impede progress if not carefully considered
