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3 years ago

What do cuticles do for land plants that was not necessary for ancestors that lived in water?

Chemistry

1 answer:

Vera_Pavlovna [14]3 years ago

8 0

Answer:

What do cuticles do for land plants that was not necessary for ancestors that lived in water? Cuticles help prevent water loss. ... The next groups of land plants to evolve were ferns, which could grow bigger and taller because they could transport water and food.

Explanation:

You might be interested in

Which transition represents a time when water molecules are moving closer together? Frost forms on a window pain. Sleet turns to

Anettt [7]

The correct answer here is C. Dew forms on the grass.

Water is a polar substance, which means it has many unique properties. One of which, is its ability to adhere and cohere to surfaces and substances. This particular question is asking about the cohesive properties of water, meaning it’s ability to stick to itself (through bonding.) The only answer choice that represents a situation where water is linking up with other molecules of water are dew drops. The water comes together using cohesion to form the drop and hen the water’s high surface tension properties meet the dew drop’s shape. The other answer choices describe alternate processes like: freezing, melting, and evaporation, respectively.

I hope this helps! :)

4 0

3 years ago

How much heat is required to vaporize 31.5 gg of acetone (C3H6O)(C3H6O) at 25 ∘C∘C? The heat of vaporization for acetone at this

KiRa [710]

Answer:

≅ 16.81 kJ

Explanation:

Given that;

mass of acetone = 31.5 g

molar mass of acetone = 58.08 g/mol

heat of vaporization for acetone = 31.0 kJ/molkJ/mol.

Number of moles = $\frac{mass}{molar mass}$

Number of moles of acetone = $\frac{31.5}{58.08}$

Number of moles of acetone = 0.5424 mole

The heat required to vaporize 31.5 g of acetone can be determined by multiplying the number of moles of acetone with the heat of vaporization of acetone;

Hence;

The heat required to vaporize 31.5 g of acetone = 0.5424 mole × 31.0 kJ/mol

The heat required to vaporize 31.5 g of acetone = 16.8144 kJ

≅ 16.81 kJ

4 0

4 years ago

Question 16(Multiple Choice Worth 5 points)

stiks02 [169]

Answer:

It is equal to the total mass of the products.

Explanation:

Hope this helps :)

8 0

3 years ago

5. The surface area of a desk is 31 dm2. Change this area to,um2

Oxana [17]

Answer:

$\large \boxed{3.1 \times 10^{11} \, \mu\text{ m}^{2}}$

Explanation:

1. Convert square decimetres to square metres

$\text{Area} = \text{31 dm}^{2} \times \left (\dfrac{\text{1 m}}{\text{10 dm}}\right )^{2} = \text{0.31 m}^{2}$

2. Convert square metres to square micrometres

$\text{Area} = \text{0.31 m}^{2} \times \left (\dfrac{\text{1 $\mu$m}}{10^{-6} \text{ m}}\right)^{2} = 3.1 \times 10^{11} \, \mu\text{m}^{2}\\\text{The surface area of the desk is $\large \boxed{\mathbf{3.1 \times 10^{11} \, \mu} \textbf{ m}^{2}}$}$

4 0

3 years ago

What is the key difference between organic and inorganic molecules

Naya [18.7K]

Answer:

See the answer below, please.

Explanation:

Organic compounds are those produced by living beings (molecules associated with living beings) and correspond to carbon compounds (the main difference with inorganic compounds). The latter are produced by natural processes or in the laboratory.

Example of organic products: alkanes (methane), alcohols (ethanol or ethyl alcohol)

Example of inorganic products: sodium hydroxide, sodium chloride

4 0

4 years ago