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notka56 [123]
3 years ago
10

Come up with one significant example of artificial selection and not natural selection. Explain why/how it has changed the speci

fies?
Biology
1 answer:
Masja [62]3 years ago
4 0

Answer:

Dog breeding

Explanation:

Humans select traits they desire in pets,

Some of these traits would be selected against by nature:

Ex: Toy breeds have fragile bones, poor health and few defensive capabilities, meaning they are a snack to any predator even small ones like a fox.

Nature wants healthy, strong individuals, in the wild big enough to hunt and strong enough to fight off other predators.

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Nucleus is present in the animal cell
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Answer:

Yes.

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The nucleus is present in both animal and plant cells.

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Which of the listed relationships between groups is correct?
iren [92.7K]

Answer:

A. Chelicerates are a group of arthropods

E. Sea urchins are a group of echinoderms

B. Gastropods are a group of mollusks

Explanation:

Chelicerates are primitive arthropods having 6 pairs of appendages. 1 oral appendage used for feeding and lack actual mouth parts for chewing up "suck up predigested food". Cephalothorax is the largest and Abdomen contains gills.

Sea urchins are a group of echinoderms as they have spin skin , all marine and found in the bottom of the sea.

Gastropods are the largest and most varied group of molluscs. Gastropod means stomach footed, a typical gastropod is a coiled mass of organs enclosed in a dorsal shell, which rests on the foot having a head ans sensory structures on head and having an operculum.

7 0
3 years ago
Which one of the following statements is true of enzyme catalysts? A) Their catalytic activity is independent of pH. B) They are
muminat

Answer:

D) They can increase the reaction rate for a given reaction by a thousand-fold or more.

Explanation:

Enzymes are like catalysts with the only difference that they are bio-molecules. Biochemical/chemical reactions are slow because of 'transition state barriers' which require a lot of energy to overcome so enzymes rather than overcoming transition state barrier provide an alternate pathway for biochemical reactions which require comparatively less energy. Thus presence of an enzyme leads to an increase in reaction rate because alternate pathway which requires less energy makes the rate of chemical reaction rapid by a thousand-fold or more.

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Coal is derived from which of the following materials?
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C) Rocks

May I have brainliest??

Hope This Helps!!
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