Answer:
They both were a downfall
Explanation:
Answer:
b) The rate of oxygen transport by diffusion across the lungs must generally match the rate of transport by the circulatory system.
Explanation:
The respiratory and cardiovascular system works sin synchronization with each other to transport oxygen to tissue and eliminate carbondioxide.
example: Exercising skeletal muscles has increased metabolic rate which in turn cause increase requirement of oxygen and as a result increased carbondioxide will be produced.The body will function by releasing local metabolites which in turn effects on heart simultaneously blood vessels will dialates. The heart will pump more blood to deliver the oxygen and nutrient to match the metabolic requirement and will washout carbon dioxide.
Concrete is a composite, since it is composed of various elements like, sand, gravel & water. When mixed together with the proper measurements, it produce cement which is used for building construction, road concreting, etc.
Answer:
Option. A) 12
Explanation:
An organism with 24 chromosomes in each body cell will produce sex cells with 12 chromosomes. The chromosome number is half because meiosis occurs in sex cells in which parent cell is divided into four daughter cells having half number of chromosome i. e. haploid. So the parent cell has 24 chromosome when division occurs, the number of chromosome becomes half i. e. 12.
Answer: D
Explanation:
Seems the most reliable to me :) good luck