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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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What 2 types of point mutations will cause a frameshift mutation?
Bas_tet [7]

Answer:

Insertion and deletion

Explanation:

A frameshift mutation is when the entire reading frame of DNA is shifted, and incorrect.

Frameshift mutations can either be caused by insertion or deletion.

When insertion or deletion occur, a nonsense protein will be made.

So, the correct answer is insertion and deletion.

6 0
3 years ago
53 The plants in an ecosystem produce food
Finger [1]

Answer:

The plants in an ecosystem produce food  for most of the other organisras that live in  that ecosystem. The role of a plant in its  ecosystem is its <em>trophic level</em>

Explanation:

Plants are the least to be found in the trophic level, they are otherwisely called <em>autotrophs. </em>They make food for themselves while others among the trophic level depend on them

6 0
3 years ago
Explain how predators differ from parasites. give an example of each kind of organism
dsp73

Parasite: Parasites are different from predators because parasites only take resources from one host, whereas predators eat many prey. A good example of this is the trematode parasite Schistosoma mansoni. An adult schistosome parasite lives inside of just one human host

6 0
3 years ago
What does "chemical composition" mean when speaking of minerals and rocks?
Julli [10]

Answer:

the components

Explanation:

when talking about the chemical composition is the same thing as saying the chemical components

3 0
3 years ago
Write 8 examples on possible hazard in raising four-legged animals and fish​
dedylja [7]

Answer: The below are following hazards of four-legged animals and fish.

Explanation:

The four legged animals like cats, dogs, horse, and others need proper shelter, food, and care to survive.

They need to be taken outdoors for excretion, and walk.

The mating period is not fix and not easily done.

The four like fishes like turtle and squid are difficult to be handled in aquarium.

The four legged fishes do not come in fishing net during aquarium cleaning.

There are chances of being biten by four legged animals and their associated diseases like rabies.

These animals can lick the food we eat and contaminate the food.

The animal feces may produce air pollution.

The animal noise like dog bark can cause noise pollution.  Thus can lead to problem of hypertension.

3 0
3 years ago
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