Examlex
Which type of soil has the best oxygen and water penetration to support plant growth?
Helium
A chemical element with symbol He and atomic number 2, known for being a lightweight, inert gas widely used in balloons and as a coolant.
Neon
A chemical element with the symbol Ne and atomic number 10, it is a colorless, odorless, inert monatomic gas under standard conditions, with about two-thirds the density of air and is used in fluorescent lamps and signs.
Argon
A noble gas element with the atomic number 18, colorless, odorless, and inert, making up about 1% of the Earth's atmosphere.
React
To react means to respond to a stimulus or to undergo a chemical change.
Q11: _ are heterotrophs that grow as a
Q11: sweat gland<br>
Q21: _ of our food crops are the
Q22: _-pollinated flowers are typically small, nonfragrant, and
Q27: The _ is a system of fluid-filled
Q33: The letter "A" in the accompanying figure
Q40: hair<br>
Q42: _ respond to mechanical energy such as
Q47: _ are tetrapods that live on land
Q62: Four of these statements are true about