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LekaFEV [45]
3 years ago
7

The element with an atomic number of 4 is?

Biology
1 answer:
S_A_V [24]3 years ago
8 0

Answer:

Be

Beryllium

Explanation:

number of protons = atomic number.

number of electrons = atomic number

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Regardless of cost, which biomass fuel provides the most energy?
Ostrovityanka [42]

Answer:

Wood

Explanation:

Trapped energy is <u>released</u><u> </u><u>by</u><u> </u><u>burning</u><u> </u><u>and</u><u> </u><u>can</u><u> </u><u>be</u><u> </u>converted into Biomass Energy.

so, wood would remain the largest Biomass Energy source.

Good Luck. ☺

6 0
3 years ago
Is the pH of Claire's small intestine below, within, or above the optimal range of each enzymes?
Margaret [11]

Answer: Protease is within

Lipase is within

Carbohydrase is within

Explanation:

Because a pH of 9.1 is within the green area for every graph, Claire’s pH is within the optimal range for every enzyme.

6 0
3 years ago
Calculate the mass of a liquid with a density of 3 g/mL and a volume of 20 mL.
yawa3891 [41]

Given that,

Density of the liquid, d = 3 g/ml

Volume, V = 20 mL

To find,

The mass of the liquid.

Solution,

The density of an object is given by its mass divided by volume such that,

d = m/V

m is mass

m = d×V

Put all the values,

m = 3 g/mL × 20 mL

= 60 grams

Hence, the mass of a liquid is 60 grams.

5 0
4 years ago
Why did gregor mendel use peas in his experiments?peas grow very slowly.pea reproduction cannot be controlled.peas normally prod
Dmitriy789 [7]

Answer:

The correct answer is peas have characteristics that have two forms.

Gregor Mendel used pea plant  <em>Pisum sativum </em>as a model plant for his experiments. There are many applications behind his choice, one of which is observable characteristics with contrasting traits.

Pea plant has many observable characteristics which exist in two forms for example:

  • Plant size (tall or dwarf)
  • Pea color (green or yellow)
  • Pod shape (yellow or green)
  • Flower color (purple or white)
  • Pea shape (round or wrinkled)

Other benefits were like: short life cycle, it produces a good number of offspring in a cross, easy to breed or cross-pollinate, hybrids were liable, bisexual flowers which makes it easy to produce true-breeding etc.

5 0
4 years ago
Read 2 more answers
The third stage of cellular respiration is
dexar [7]
B- Electron transport chain
7 0
3 years ago
Read 2 more answers
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