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svlad2 [7]
3 years ago
9

Which of the following is true regarding extinction?

Biology
2 answers:
Serjik [45]3 years ago
5 0
B. because a mass extinction is caused by several causes to force a group of organisms to die.
ololo11 [35]3 years ago
5 0
<span>b. Single events or several causes working together to produce extinction in a short period is referred to as mass extinction.</span>
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Calculate the molarity of 0.75 L of a solution containing 0.83 g of dissolved KCI. A 0.015 M B 0.75 M C 1.1 M D 6.2​
marissa [1.9K]

Answer:

A 0.015M

Explanation:

Molarity, which refers to the molar concentration of a solution, can be calculated using the formula:

Molarity (M) = mole (n) / volume (L)

Based on the information provided in this question, the solution contains 0.83 g of dissolved KCI.

We can calculate the number of moles of KCl in the solution by using the formula:

Mole = mass ÷ molar mass

Where atomic mass of; K = 39, Cl = 35.5

Molar Mass of KCl = 39 + 35.5

= 74.5g/mol.

Mole = 0.83g/74.5g/mol.

mole = 0.01114

Approximately, n = 0.011mol

Hence, molarity = 0.011mol/0.75L

Molarity = 0.0146

Molarity = 0.015M

8 0
3 years ago
Which are examples of ecosystem diversity?
natita [175]

Answer:

Deserts.

Forests.

Large marine ecosystems.

Marine ecosystems.

Old-growth forests.

Rainforests.

Tundra.

Coral reefs.

Explanation:

3 0
2 years ago
Read 2 more answers
According to the fluid mosaic model of cell membranes, phospholipids
mina [271]

Answer:

I wasn't sure what you were asking

Explanation:

The fluid mosaic model explains various observations regarding the structure of functional cell membranes. According to this biological model, there is a lipid bilayer (two molecules thick layer consisting primarily of amphipathic phospholipids) in which protein molecules are embedded.

3 0
3 years ago
Smiling is a universal sign of happiness in all cultures. T/F
Zarrin [17]

Answer:

True

Explanation:

Smiling is considered as a universal sign of happiness. Smiling is something that makes a person happy internally. During birth babies smile. Some people smile even during sleep. It has been observed that when people are exposed to something they love or enjoy, they usually smile such as song, music, old photographs etc. Smiling is not a learned behaviour , it is considered as a sign of pleasure and openness across various cultures.  

Hence, the given statement is true

4 0
3 years ago
In anatomical, directional terminology, the esophagus is _________ to the mouth.
nadezda [96]

<u>Complete Question:</u>

In anatomical, directional terminology, the esophagus is ------------- to the mouth.

a.Superior

b.Lateral

c.Medial

d.Posterior

<u>Correct Option:</u>

In anatomical, directional terminology, the esophagus is<u> medial</u> to the mouth.

<u>Option: C</u>

<u>Explanation:</u>

  • The anatomical directional terminology is necessary to define the relative positions of different physical components.
  • Devote these words to recall in order to prevent ambiguity when you research or explain the positions of various parts of the body.
  • The terms consist roots, prefixes, and suffixes. The source of a word often relates to an organ, tissue or condition while the root is most often defined by the prefix or suffix.
  • The center of the body or its orientation towards the west is understood as medial.
5 0
3 years ago
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