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Gelneren [198K]
3 years ago
15

Do you label a container before or after putting a substance in the container?

Biology
2 answers:
hammer [34]3 years ago
6 0

Answer:

yes so you don't get confused on what the substance is

Explanation:

eg 2021!!!!!

Pani-rosa [81]3 years ago
6 0
Pretty sure it’s before
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Explain the difference between El Nino and La Nina.
MAVERICK [17]

Hey there!

El Nino typically involves waters with a warmer than usual surface temperature, a flatter thermocline (cooler water moves to the surface), and weaker trade winds. As for La Nina, think of it as the opposite of El Nino. There will be stronger trade winds, and cooler surface water temperatures.

Hope this helps!

6 0
3 years ago
According to the competitive exclusion principle, two species cannot continue to occupy the same A) habitat. B) niche. C) territ
levacccp [35]

Answer:

Niche

Explanation:

Niche basically is the lifelihood of a species that involves feeding on what, drinking from what....

If both species are competing for the same resources, they would compete until a certain species is eradicated. (think of it as 2 species of ants in 2 colonies that are close to each other, take the same leaves, prey and stuff. They would fight with each other in other until one colony is eradicated.) hence, unless a species and adapt and change its niche, both species would fight until one is eliminated. Thus, the principle states that 2 species cannot continue to occupy the same niche, not living environment.

6 0
3 years ago
Read 2 more answers
When the source of a wave is moving relative to an observer of the wave, which of the following is true?
galina1969 [7]

Answer:

Observers ahead of the wave observe an apparent increase in wave frequency  

Explanation:

This is the Doppler Effect. The frequency of a wave increases when the source approaches the observer and decreases as the source recedes.

B, C, and D are wrong. Observers behind the source notice a decrease in frequency.

4 0
3 years ago
Help me with this _XX
expeople1 [14]

Answer:

B. Hardness

Explanation:

Physical properties of a substance is defined as the properties which can be observed or measured without changing the composition of matter.

Physical properties include odor, appearance, color, texture, boiling point, melting point and many others.

Hardness is a physical property of a substance as it describes the  resistance of substance to deformation and can be observed by simple touch or without changing the composition of matter.

While reactivity, toxicity and flammability are chemical properties of substances that change one type of matter into another type.

Hence, the correct option is B.

5 0
3 years ago
Hormones such as calcitonin, parathyroid hormone, and the pituitary hormones are protein-based and water-soluble. How does a hor
sashaice [31]

Answer: Substances that are protein based cannot cross the lipid cell membrane, but can exert their effect by binding to the proteins based receptors present on the lipid bilayer.

Explanation:

Hormones such as calcitonin , Parathyroid hormone and pituatry horomones are proteins and water soluble.They cannot cross lipid bilayer but can bind to ligand binding protein receptors.

These receptors are protein macromolecules that are specific in nature for specific hormones.

After binding to the receptors, these hormone-recpetor complexes activate second messengers and regulate the downstream effects.

8 0
3 years ago
Read 2 more answers
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