1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
IgorLugansk [536]
3 years ago
12

Element are building blocks of matter that combine chemically to form countless compounds. which of the following are example of

elements?
A acid, base and salt
B silicon, iron, and aluminum
C water, methane, and glucose
D Proton, neutron and electron
Biology
2 answers:
Tresset [83]3 years ago
8 0
Your answer is B. Good luck with the rest of your homework!
Katen [24]3 years ago
5 0
It's either B or C. b would be more reasonable.
You might be interested in
Where are fats, carbohydrates, and proteins broken down into particles small enough to be absorbed into the body?
siniylev [52]

Answer:

Duodenum (option 3)

Explanation:

Digestion of carbohydrates, proteins, and fats continues in the small intestine. Starch and glycogen are broken down into maltose by small intestine enzymes. Proteases are enzymes secreted by the pancreas that continue the breakdown of protein into small peptide fragments and amino acids.

The duodenum is the first section of the small intestine and is the shortest part of the small intestine. It is where most chemical digestion using enzymes takes place

8 0
3 years ago
Read 2 more answers
When the concentration of a substance higher on one side of the cells selectively permeable membrane, certain molecules may move
grin007 [14]

Answer:

A.

Explanation:

osmosis and diffusion are both passive transport bc it doesnt require energy and only moves down cocentration gradient, never against concertration gradient. Give me a brainliest if i helped! ♡

8 0
3 years ago
When a living organism dies, it stops taking in new carbon. Thus, as the radioactive carbon-14 decays, the ratio of carbon-12 to
Alexxandr [17]

Answer: The fossil is 11459 years old.

Explanation:

Half-life of carbon-14 = 5700 years

First we have to calculate the rate constant, we use the formula :

k=\frac{0.693}{5700\text{years}}

k=1.21\times 10^{-4}\text{years}^{-1}

Now we have to calculate the age of the sample:

Expression for rate law for first order kinetics is given by:

t=\frac{2.303}{k}\log\frac{a}{a-x}

where,

k = rate constant  = 1.21\times 10^{-4}\text{years}^{-1}
t = age of sample  = ?
a = let initial amount of the reactant  = 100 g
x = amount decayed = 75 g
a - x = amount left after decay process  = 100 - 75 = 25 g  Now put all the given values in above equation, we get
[tex]t==\frac{2.303}{1.21\times 10^{-4}}\log\frac{100}{25}

t=11459years

The fossil is 11459 years old.

4 0
3 years ago
Which is true about factors that influence
baherus [9]

Answer:

B. The rain shadow effect causes equal

precipitation on both sides of a mountain.

Explanation:

A rain shadow is a patch of land that has been forced to become a desert because mountain ... On the other side of the mountain—the rain shadow side—all that precipitation is blocked. ... This cool air cannot hold moisture as well as warm air. Cool air forms clouds, which drop rain and snow, as it rises up a mountain.

3 0
3 years ago
Which was most likely an affect on society that resulted from improvements in blood handling during World War I and World War II
sammy [17]

Answer:

B. more soldies who had lost a limb returned home

4 0
3 years ago
Other questions:
  • Codominance is a form of inheritance in which two different alleles for a gene are both expressed, and neither allele is dominan
    5·1 answer
  • Need help with the following questions
    14·1 answer
  • Most of the lymph returns to the venous circulation by way of the ______.
    13·1 answer
  • A worker standing on a freshly mopped floor is adjusting products on a metal shelf. There is an exposed wire in contact with the
    10·1 answer
  • The blob operon produces enzymes that convert compound A into compound B. The operon is controlled by regulatory gene S. Normall
    7·1 answer
  • Which one I need help
    11·1 answer
  • Select the correct answer.
    6·1 answer
  • Which of the following materials helps plants use energy from sunlight? *
    15·2 answers
  • Fr.ee po.ints add sum memes tho
    8·2 answers
  • How is cytokinesis different between animal and plant cells?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!