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Likurg_2 [28]
1 year ago
6

During an investigation, Sam observes the number of hummingbirds that come to his large bird feeder at different times of day. H

e fills the feeder to the top the first day and counts the number of birds at 6 a.m., noon, and 6 p.m. over ten days. What are the independent and dependent variables in Sam’s investigation?
The number of birds is the independent variable, and time is the dependent variable.
Time is the independent variable, and the number of birds is the dependent variable.
The type of bird food is the independent variable, and the number of birds is the dependent variable.
The number of birds is the independent variable, and the type of bird food is the dependent variable.
Biology
1 answer:
Goryan [66]1 year ago
4 0
"Time is the independent variable, and the number of birds is the dependent variable" is the one among the following choices given in the question that states the independent and dependent variables in Sam’s investigation correctly. The correct option among all the options that are given in the question is the second option.
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Stomach cells are moderately well adapted to the acidity and protein-digesting activities in the stomach by having: a) Stomach c
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Answer:

The correct answer will be option-B

Explanation:

The environment of the stomach is acidic in nature maintaining value less than seven as it kills the microbes and helps activate the pepsin to digest the proteins.

The acidic nature of the gastric juice does not affect the stomach as the mucosa layer of the stomach secretes mucous and the if the cells get affected then the cells are repaired by the process of mitosis taking in the epithelial cells.

Thus, Option-B is the correct answer.

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2 years ago
Why is it better to describe ion formation as a “transfer of electrons” rather than as “losing and gaining” electrons?
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Explanation:

This is because the atom that ’donate’ the electrons and the one that ‘accepts’ the electrons – to become ions – will share an electrostatic association and form an ionic bond. So in reality, the atoms are only transferring electrons between themselves  rather than “losing and gaining” electrons. When the ionic bonds are broken, such as in chemical reactions, the atoms go back to neutral (regain their electrons) and form new associations with other atoms to form new compounds.

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5 0
1 year ago
To help explain surface tension, use a single water molecule in the template, and draw arrows representing the possible location
kramer

Answer:

The correct representation is attached with the explanation.

Explanation:

In this representation of the surface tension, blue arrows between green water molecules are the possible molecules that can be used as the location for forming hydrogen bonds by a single molecule. Surface tension is the tendency of a liquid surface strectch to neighbouring molecules or ability to shrink in minimum surface area possible. Hydrogen bonds is an intermolecular force or interaction responsible for the surface are of liquide molecules. This bonds is towards every direction where the similar molecule present.

3 0
2 years ago
Greg wants to build a tree house. He wants the house to last for a long time and to not be broken down by rain, snow, and wind.
bulgar [2K]

Build several models of his tree house out of different materials, and see which model holds up best to wind, water, and ice.

4 0
2 years ago
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Which of the Caulerpa taxifolia’s traits make it so dangerous to local ecosystem
k0ka [10]

<u>Answer:</u>

<em>Caurepa taxifolia is an invasive species of algae and is listed in the IUCN list of 100 invasive species. </em>

<u>Explanation:</u>

In is an algae usually found in the pacific ocean. It was earlier used in aquariums as  an <em>ornamental species of algae</em>. The dangerously invasive nature overshadows its attractive appearance.

It is inedible and  increases in numbers at a surprisingly <em>accelerated rate.</em>  The growth of other plants is difficult in areas dominated by the Caurepa taxifolia. The introduction of this <em>algae was in the Meditteranian sea. </em>

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