1. During inhalation the diaphragm contracts or moves down, what happen to the chest
cavity?
a. Expand
Answer:
There will be three spots that will light up.
Explanation:
There is a research paper published which demonstrated the trisomy of 21 chromosome. They found out that there are total three spots that light up in Trisomy 21 (down's syndrome's fetus). I have attached picture from research paper and provided the reference below.
Reference
(Davies, A. F., Barber, L., Murer-Orlando, M., Bobrow, M., & Adinolfi, M. (1994). FISH detection of trisomy 21 in interphase by the simultaneous use of two differentially labelled cosmid contigs. Journal of medical genetics, 31(9), 679-685)
The materials John used in his science fair project include the following:
<h3>What is a Fertilizer?</h3>
This refers to a substance which is added to the soil in other to increase the fertility and is commonly used in agriculture so as to maximize yield and sales by farmers.
The experiment John did was to measure the fertility of the soil after several substances have been added to it through the growth of the plant.
It was discovered that the plant in which chemical fertilizer was added to the soil grew faster than the rest when it was measured by the ruler which therefore makes the materials listed the most appropriate choice.
Read more about Fertilizer here brainly.com/question/24544067
#SPJ1
<span>The correct option is D. An homologous structure is a type of structure that is found in different animals but have similar form of arrangement. Homologous structures indicate decent from a common ancestor or same evolutionary origin. Homologous structures in two animals may not be alike in appearance or function but genetically, they came from the same structure of the last common ancestor.</span><span />
