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mixas84 [53]
2 years ago
12

Sid is observing an unknown cell under a microscope. The presence of which structure would help him to determine if the cell was

from a plant or from an animal?
O Nucleus
Cell wall
Ribosomes
O Cell membrane
Biology
1 answer:
vlada-n [284]2 years ago
6 0

cell wall

the main difference between animal cell and plant cell is in existing of cell wall on plant cell and existing of centriols in animal cell large vacules in plant cell ...

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What function does the structure shown below preform
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Its .C It stores genetic information 
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In "for more wonder, rewild the world," monbiot asserts that in the past, a far greater range of plant and animal species than w
kari74 [83]

George Monbiot is spearheading the Rewilding Movement. The environmentalist and writer is prominent in the platform. He was featured in TED Talk and talked about a large scale conservation approach aiming to restore the lost habitats. Here is an excerpt of his speech where he discusses the lost megafuna:

"What megafauna, you say? Well, every continent had one, apart from Antarctica. When Trafalgar Square in London was excavated, the river gravels there were found to be stuffed with the bones of hippopotamus, rhinos, elephants, hyenas, lions. Yes, ladies and gentlemen, there were lions in Trafalgar Square long before Nelson's Column was built. All these species lived here in the last interglacial period, when temperatures were pretty similar to our own. It's not climate, largely, which has got rid of the world's megafaunas. It's pressure from the human population hunting and destroying their habitats which has done so."

3 0
3 years ago
In guinea pigs, black fur color is dominant and brown fur color is recessive. Several matings between the same male black guinea
Fed [463]

Answer:

BB x BB

Explanation:

All of the offspring inherit traits from the dominant gene. This means there are no recessive present.

4 0
3 years ago
A certain buffer is made by mixing a weak acid HA and its conjugate base A–. When HA is present at a concentration of 0.5 mM and
MAVERICK [17]

Answer:The ratio of the concentrations of HA  and A^- when the buffer has a pH of 7.02 is 0.69

Explanation:

The dissociation constant for formic acid = K_a=1.8\times 10^{-4}

Concentration of HA= 0.5 mM

Concentration of A^-= 0.1 mM

pH = 6.16

First we have to calculate the value of K_a.

Using Henderson Hesselbach equation :

pH=pK_a+\log \frac{[A^-}{[HA]}

Now put all the given values in this expression, we get:

6.16=pK_a+\log (\frac{[0.1]}{0.5})

pK_a=6.86

To calculate the ratio of the concentrations of HA  and A^- when the buffer has a pH of 7.02.

Using Henderson Hesselbach equation :

7.02=6.86+\log \frac{[A^-]}{[HA]}

7.02=6.86+\log \frac{[A^-]}{[HA]}

\frac{[A^-]}{[HA]}=1.44

\frac{[HA]}{[A^-]}=0.69

Thus the ratio of the concentrations of HA  and A^- when the buffer has a pH of 7.02 is 0.69

7 0
3 years ago
People often say that dogs are "man's best friend.How closely related are dogs and humans? To complete this activity, you will n
Svetllana [295]

Answer:

See explanation

Explanation:

Taxonomy actually means “arrangement law”. It is the branch of biology that deals with the classification of organisms.

The taxonomic classification system was invented by Carl Linnaeus. It is a hierarchical model of classifying living organisms based on shared characteristics.

Dogs are referred to as 'man's best friend' partly owing to some level of taxonomic relationship between the two species. Dogs and man belong to a class of vertebrates known as mammals- one of the shared characteristics of mammals is that they give birth to their young ones alive.

The taxonomic classification of man is:

Domain: Eukaryote - Kingdom - Animalia Phylum - Chordata Subphylum - Vertebrata Class - Mammalia Order - Primates Family - Hominidae Genus - Homo Species - sapiens.

The taxonomic classification of dog is:

Domain: Eukaryote - Kingdom - Animalia Phylum - Chordata Subphylum - Vertebrata Class - Mammalia Order - Carnivora Family - Canidae Genus - Canis Species - lupus familiaris

8 0
3 years ago
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