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victus00 [196]
2 years ago
14

Which of the following defines the Permian-Triassic? a The mass extinction that could occur if an asteroid were to hit the Earth

. b A catastrophic event where 90 percent of the ocean's species were lost and 70 percent of the land life was thought to go extinct. c The effects of repeated NEOs entering our Solar System d The Great Dying that is said to have completely destroyed all life, making it a mass extinction
Biology
2 answers:
Elena-2011 [213]2 years ago
4 0
It's (B) A catastrophic event where 90 percent of the ocean's species were lost and 70 percent of the land life was thought to go extinct.
Nataly_w [17]2 years ago
4 0

Answer:

Option b, A catastrophic event where 90 percent of the ocean's species were lost and 70 percent of the land life was thought to go extinct.

Explanation:

In the Permian period large mass extinction of the Earth took place. This incident took place some 299 years ago.

The super continent Pangaea was emerging during the Permian period which caused severe extremes of climate and environment as it was extremely large in size. Much of the region was under ice caps and was frozen.

Nearly 90 percent of all marine species and 70 percent of all land animals became extinct.

Hence , option A is correct

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Answer:

A) Lipid synthesis : Smooth endoplasmic reticulum.

B) Calcium ion storage : Smooth endoplasmic reticulum.

C) Poison detoxification : Smooth endoplasmic reticulum.

D) Protien synthesis : Rough endoplasmic reticulum.

E) Protien modification and sorting : Golgi apparatus

F) Cisternal maturation : Golgi apparatus.

G) Macromolecule digestion : Lysosomes

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Explanation:

<u>Smooth endoplasmic reticulum</u> is involved in the synthesis and storage of lipids . It also stores the calcium ions and contain enzymes responsible for the detoxification of the poisonous substances like CCL4 and other agents. SO the answer of A , B  and C is Smooth endoplasmic reticulum.

<u>Rough endoplasmic reticulum</u> contains ribosomes which synthesize protiens thus answer of D is RER.

The <u>Golgi apparatus</u> functions as a factory in which the protiens recieved from the endoplasmic reticulum are modified and sorted and is also involved in cysternal maturation so answer of option E and F is Golgi apparatus.

<u>Lysosomes</u> are the part of endomembrane system involved in the digestion of the macromolecules and in the recycling of the worn-out organelles hence also involved in autophagy. Hence answers of G and H is lysosomes.

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¿Que tipo de inmunidad participa en la defensa del cuerpo contra el Coronavirus.?
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Answer:Spanish is not what I speak so

Explanation:

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Which are factors of rock types that affect the rate of weathering? Select three options
vagabundo [1.1K]

Answer: Incomplete

"Check all that apply. porosity, moisture, temperature, mineral, softness, or ease of dissolving"

<em>From the options, the three answers are </em><u><em>mineral composition,</em></u><em> </em><u><em>ease of dissolving</em></u><em> and p</em>

Explanation:

Weathering is the phenomenon in which surface of rocks are broken down and leaches or washed away.

The factors that affect the rock type and rate of weathering of said rock include:

  1. Composition: this translates to the <u>mineral composition </u>in the rock and how susceptible to chemical weathering reaction
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