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RoseWind [281]
3 years ago
8

Explain your observations. What did you observe as you added phenolphthalein to the ammonia solution? What did you observe when

vinegar was added?
Biology
1 answer:
Bess [88]3 years ago
6 0

Answer:

Liquid ammonia is liquefied ammonia and is basic in nature. It dissolves in water to give ammonium hydroxide which ionizes to give hydroxyl ions. Therefore it turns red litmus blue and phenolphthalein solution pink.

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C. _____________________ store food or pigments.
Tcecarenko [31]

Answer:

Plastids

Explanation:

6 0
3 years ago
Angraecoid orchids provide nectar to the African moths. The moths in turn help in pollinating the plant. What type of evolution
Svetllana [295]

Answer:

A. Coevolution

Explanation:

Coevolution occurs when two species/organisms reciprocally affect the evolution of one another. An example is the coevolution is flowering plants and associated pollinators (e.g., bees, birds, and other insect species). Moths benefit form nectar and orchids benefit from pollinaton.

3 0
3 years ago
The length of linker DNA segments varies somewhat among organisms. The length of the linker DNA in sea urchin is 110 base pairs.
nasty-shy [4]

Answer:

362 nucleosomes

Explanation:

A nucleosome repeat is made up of the DNA (146 bp) wrapped around the core nucleosome particle and the linker DNA (110 bp as in this situation). We can conclude that, every repeat stands for 256 (146 + 110) base pairs of DNA.

We are given the length of the entire region to be 92,672 bp long,

To determine the number of nucleosomes to organize the region into the 10nm fiber structure

Let,

Number of nucleosomes =

the length of the entire region

------------------- -----

base pairs of DNA.

= 92,672

-------

256

= 362 nucleosomes

Therefore, 362 nucleosomes is needed to structure the region into the 10nm fiber structure.

5 0
3 years ago
the substance that are before any chemical reaction are called 1) dioxides 2) oxygen 3) products 4) reactants
Vesna [10]
The answer is Reactants :)


6 0
3 years ago
(HELP)
Sergeu [11.5K]
The answer is a. the abiotic components of an ecosystem
6 0
3 years ago
Read 2 more answers
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