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STatiana [176]
3 years ago
15

Explain why sponges and cnidarians were the first animals to evolve

Biology
2 answers:
malfutka [58]3 years ago
6 0
Once the Earth was full of water (ocean) after volcanic activities the mainland became land ( sorry about my english i am hungarian and i am still learning the language )
alisha [4.7K]3 years ago
5 0
Sponges and cnidarians were the first animals to evolve from a multicellular ancestor. The oldest fossil evidence of multi-cellular animals is burrows that appear to have been made by smooth, worm like organisms. Between 620 and 550 million years ago large, complex, soft-bodied multi-cellular animals appear in the fossil record.
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Place the following steps of endomembrane system function in the correct order.
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Answer:

D

Explanation:

<em>The correct option here would be</em><em> D</em><em>.</em>

The endomembrane system refers to a group of membrane-based organelles whose primary function is to synergistically work together to modify, package, and transport lipids and proteins. The system includes organelles such as the lysosome, the nuclear envelope, the endoplasmic reticulum, and the Golgi apparatus.

For an endomembrane system function involving a protein, the protein would first of all need to be synthesized by the ribosome - the free ones or the ones attached to the rough endoplasmic reticulum. Thereafter, the synthesized protein would then be folded or packaged into transportable vesicles. The vesicles are then received by the Golgi apparatus which further modifies the proteins before transporting them accordingly.

Hence, the correct order of a typical endomembrane system function would be:

  1. <em>Ribosomes on the RER synthesize proteins.</em>
  2. <em>Proteins are packaged into transport vesicles.</em>
  3. <em>Golgi apparatus receives transport vesicles from the RER.</em>
  4. <em>Proteins are modified by the Golgi apparatus.</em>
  5. <em>Modified proteins may be secreted from the cell by exocytosis.</em>
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3 years ago
Strong storms most often occur along which type of front?
Marysya12 [62]

The answer is D) Stationary  

(Not a 100% on this but, I'm like 90)

7 0
3 years ago
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Why is carbon important
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It also plays a key role in shaping organic molecules. Carbon<span> is very </span>important<span> to the chemistry of living things, mainly because of the versatility of structures it can form with itself and with other atoms</span>
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Darwin’s hypothesis about evolution is considered a “theory.” What does this mean? Is it just a guess?
lozanna [386]

Answer:

yes

Explanation:

an hypothesis is a guess based on observation

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