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Zigmanuir [339]
4 years ago
7

last year drought conditions settled into the ecosystem of garden snails. before the drought began, there were 500 garden snails

. last year, 50% of the population died and no offspring were produced. if these conditions contunue, in how many years will the entire population die off?

Biology
1 answer:
AURORKA [14]4 years ago
8 0
Because you need to find half of 500.

The answer is 250.

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Organism in which the embryonic blastopore becomes its anus Deuterostome

<u>Explanation:</u>

The term Deuterostome refers to second mouth. The first opening which is called blastpore becomes its anus in deuterostomes. In protostomes, this first opening will be the mouth.  The other name given to these Deuterostomes enterocoelomates. It is the enterocoely from which the   coelom of  Deuterostom starts emerging and growing.  

Chordata, Echinodermata, Hemichordata are the classes of deuterostomes:. The zygote is the one that gets developed first in  protostomes and deuterostomes.Radial cleavage occurs in deuterostom in which the division of cells lies either in parallel direction or in perpendicular direction with respect to the polar axis.

3 0
3 years ago
How is nitrogen returned to the atmosphere during the nitrogen cycle? a. it is returned to the atmosphere in a process called ni
AlladinOne [14]

Nitrogen is returned to the atmosphere during the nitrogen cycle in a process referred to as denitrification.

<h3>What is denitrification?</h3>

It is a process whereby nitrogen becomes mineralized from nitrogenous compounds. In other words, it is the reduction of nitrates to produce elemental nitrogen which is returned to the atmosphere.

Denitrification is a microorganisms-driven process. The nitrates are made to pass through a series of reactions with intermediate products before finally leading to the production of elemental nitrogen.

More on the denitrification process can be found here: brainly.com/question/13624886

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5 0
2 years ago
Pls helppppppp❤️❤️.
IgorLugansk [536]

Answer:

I think it's B

Explanation:

This is if the egg is not fertilized which your question implies it is not.

Good Luck!

5 0
3 years ago
Describe the fossil record
beks73 [17]

The Fossil record is the history of life as documented by fossils, the remains or imprints of the organisms from earlier geological periods preserved in sedimentary rock.

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Dna can make copies of itself through replication because the nitrogen bases always pair
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yes, true.

Explanation:

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