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Studentka2010 [4]

3 years ago

13

Suppose someone told you that you can get rid of lizards in your house by using eggshells. Explain how you would carry out a sci

entific investigation to test the validity of the statement.

1 answer:

Angelina_Jolie [31]3 years ago

3 0

You can test the different between using less eggshells and more eggshells and record the data to see which one works better

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Skin tanning is an example of which adaptation technique? O A behavioral adaptation OB. cultural adaptation OC. structural adapt

Zarrin [17]

Answer:

Physiological

Explanation:

Definition

A metabolic or physiologic adjustment within the cell, or tissues, of an organism in response to an environmental stimulus resulting in the improved ability of that organism to cope with its changing environment

3 0

3 years ago

Volume is defined as the amount of mass that an object has? True or false

maria [59]

Answer:

False

Explanation:

Mass and volume are two different quantities. In fact:

- Mass is a scalar quantity representing the "amount of matter" contained in a certain substance. It is measured in kilograms (kg), which is one of the 7 fundamental SI units.

- Volume is a scalar quantity representing the amount of "three-dimensional space" occupied by an object or a substance. It is measured in cubic meters ( $m^3$ ).

Therefore, mass and volume are two different quantities. They are related through another quantity called density, given by:

$d=\frac{m}{V}$

where

m is the mass

V is the volume

So the density of a substance represents the amount of mass contained in a certain volume of the substance.

3 0

3 years ago

What term best describes the following organism: the so-called blue-green algae, they are photosynthetic bacteria; producing oxy

Olegator [25]

Answer:

The correct answer will be option E.

Explanation:

The features given in the question are the characteristics features of the group of bacteria belonging to Cyanobacteria.

These Cyanobacteria are the prokaryotes which are capable of synthesizing the food through a process called photosynthesis. These bacteria use sunlight as their energy, use water and air to synthesize food. They under anaerobic condition synthesize the nitrogen in special structures called heterocyst, a characteristic feature of cyanobacteria.

Thus, the features given in the question are:

1. contain photosystems to carry out photosynthesis.

2. producing oxygen

4. contain phycobilins

6. Hetrocysts: nitrogen-fixing structures.

7. The ancestor of plant chloroplasts.

Thus, option E is the correct answer.

8 0

3 years ago

a reessive allele on the x chromosome is responsible for red-green color blindness in humans. a woman with normal vision whose f

Ray Of Light [21]

Answer:

50%

Explanation:

Let the allele for red-green color blindness be represented by c.

Normal vision woman whose father is color-blind will be $X^CX^c$

Color-blind male will be $X^cY$

$X^CX^c$ x $X^cY$

Progeny: $X^CX^c, X^CY, X^cX^c, X^cY$ (See the attached image)

<em>Out of the 2 male progeny, 1 is affected for color-blindness while the other is not affected. This gives a 50% probability that a son of the couple will be color-blind.</em>

4 0

3 years ago

Help me with this pleaseeeeeeeeeee

KatRina [158]

A: Energy hope this helps

6 0

3 years ago