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Pepsi [2]
3 years ago
5

What are four major characteristics of the phylum Echinoderms?

Biology
1 answer:
umka2103 [35]3 years ago
6 0

Answer:A calcareous, spiny endoskeleton of plates or ossicles

A water-vascular system

Pedicellariae

Dermal branchiae

Basic penta-radial symmetry

Explanation:

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Hemoglobin buffers the pH of the cytosol of RBC by combining with ______ions.
jarptica [38.1K]

Answer:

H+

Explanation:

Hemoglobin is the major protein of red blood cells. It has many exposed amino groups and carboxylic groups at its surface. These NH3 and COOH groups serve as weak acids and bases respectively and allow hemoglobin to serve as a buffer to maintain the pH of the RBC cytoplasm.

As the exposed amino groups of hemoglobin protein bind to the H+ ions, the free H+ concentration of the cytoplasm of RBC is reduced leading to a buffer action to maintain the pH.

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4 years ago
A client has been prescribed timolol eye drops. what are three (3) possible adverse effects of this medication and nursing inter
vlada-n [284]
The three (3) possible adverse effects of this medication and nursing interventions/client are the following;
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7 0
3 years ago
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Which human activity has the lowest effect on global stability?
GREYUIT [131]

Answer:

I think the answer is C

''Reusing plastic bags''

Explanation:

Removing carnivores from a forest  has a great impact on a environment since the population of the herbivores will increases drastically and the dynamic equilibrium of the area will be greatly effected.

If we look at choice B '' Heating homes with fossil fuels'', this will also have a big impact on the earth since fossil fuels are non-renewable and take centuries to form. Heating homes with them will result in loss of fossil fuels.

Now let's look at choice D ''Adding heavy metals to the water supply''. Heavy metals are dangerous to the human health and even cause cancer. This will cause thousands of deaths and will also have a great impact on the global stability.

This leaves choice C ''Reusing plastic bags''. This will cause less pollution and less harm to wildlife but doesn't have any big threat to the global stability. As in changing the world population or causing deaths in large numbers.

so I think choice C is the answer

7 0
3 years ago
A solar flare is observed on Earth
bixtya [17]

D) Approximately eight minutes after it happens on the sun.

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3 years ago
Light acts like a
timama [110]

Answer:

Reflection

Explanation:

6 0
3 years ago
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