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shepuryov [24]
3 years ago
9

Warm air creates a rising, low pressure zone. A. True B. False

Biology
1 answer:
Whitepunk [10]3 years ago
6 0

Answer:

B. False

Explanation:

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A population of tree salamanders is highly variable in color and blends easily with the surrounding, colorful vegetation. After
sweet-ann [11.9K]

Answer:

This is an example of directional selection.

Explanation:

Directional selection is a type of positive selection where the evolutionary fitness of one genotype is higher compared to the other ones, thereby favoring the selection of one particular phenotype and shifting allele frequencies towards the selected genotype. In a biological context, the directional selection increases the chances for surviving and for reproducing in those organisms that have the alleles favored by this type of selection. Thus, the directional selection produces the loss of genetic variability and leads to the fixation of the dominant alleles.

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3 years ago
Which cell structure forms a barrier around a eukaryotic or prokaryotic cell
quester [9]
Its the Cell Membrane
6 0
3 years ago
The medial surface of the left lung has a cavity that accommodates the contents of the mediastinum. It is called the ________.
nataly862011 [7]

The cardiac notch is the concave area in the left lung that leaves a space for the heart to accomodate. The corrcet answer is <u>cardiac notch</u>.

<h3>What is the cardiac notch?</h3>

The left lung has superior and inferior lobules, one oblique fissure, it is adjacent to the heart, the aortic arch, the thoracic aorta, and the esophagus. It also has a cardiac notch.

The cardiac notch is a concave lung area where the heart accommodates. Its main function is to leave a space for the heart to lay. It is placed in the anteroinferior border of the superior lobule of the lung.

Since the cardiac notch is the area where the heart is placed, it only appears in the left lung.

The correct answer is cardiac notch. The medial surface of the left lung has a cavity that accommodates the contents of the mediastinum. It is called the _<u> cardiac notch</u>_.

You will learn more about the lungs at

brainly.com/question/19135226

brainly.com/question/4623601

brainly.com/question/1259618

7 0
2 years ago
Use the visuals to answer the question. Which describes the order of how the continents changed positions, according to the theo
Assoli18 [71]

It should be B) B,C,A

hope i helped

4 0
3 years ago
Read 2 more answers
You have a large bottle of 2% saline solution in the lab (2% NaCl, which is sodium chloride). You need 5 ml of 0.1% saline for a
zvonat [6]

Answer:

volume of 2% saline (V₁) = 0.25ml

volume of water = 4.75ml

Explanation:

The requirement in the question is to obtain 0.1% of NaCl from 2% NaCl, and the process is dilution. The general dilution equation is guven by:

C₁V₁ = C₂V₂

where:

C₁ = initial concentration = 2%

V₁ = initial volume = ?

C₂ = final concentration = 0.1%

V₂ = final volume = 5ml

C₁V₁ = C₂V₂

calculating for V₁

∴ V₁ = (C₂V₂) ÷ C₁

= (0.1% × 5) ÷ 2%

V₁ = 0.25ml

Now, let us calculate the volume of water needed:

V₁ + Volume of water = V₂ (volume of 0.1% NaCl)

0.25 + volume of water = 5

volume of water = 5 - 0.25

volume of water = 4.75ml

8 0
3 years ago
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