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Neko [114]
3 years ago
13

Which if the following accurately describes the life cycle of most gymnosperms

Biology
2 answers:
love history [14]3 years ago
6 0
I found the exercise on the internet and bellow are the options:
"A. Seed cones contain ovules. 
B. Germinated seeds are haploid. 
C. A pollen tube is used to prevent the fertilization process. 
<span>D. Pollen grains undergo meiosis to form egg cells."

The correct answer is D.
There are no seed cones, but pollen cones, where the ovules can be found. Germinated seeds are diploid, not haploid. The pollen tube role is to promote the fertilization process by leading the sperm to the egg, once the sperm in this type of plants do not have flagella and therefore no movement.
The correct answer is D because pollen grains are really the diploid germinative cells that </span><span>produce sperm cells.</span>
Mazyrski [523]3 years ago
3 0
Pollen grains undergo meiosis to form egg cells.
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A field of corn contains a certain amount of food energy. Compare the following situations and then answer the questions. Use th
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Before assessing the two given cases, an assumption needs to be made about the digestion of the two types of food items, corn and beef. Let us assume that both get digested by expending same amount of energy by the human body. Let the amount of energy at producer level be an arbitrary X.

Case 1: Corn to human:

Since corn is at the producer level, it will have X amount of energy. The transfer of energy from corn to human will take place with a loss of 90% energy at the producer level. Hence the humans will receive 10% of X amount of energy.

Case 2: Corn to cow to human:

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It can be seen that humans receive more energy in case 1 than case 2. Hence we can say that it is more efficient for humans to feed on corn.

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If you stopped eating what would be the first, second, and third organic compound your body would use for energy
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Take the place of part of an mRNA within the ribosome.

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The nucleotide sequence copy of a gene is present in the mRNA. Each amino acid is represented by a triplet of the four nucleotide bases that make up the genetic alphabet. The relationship between triplet sequences and amino acids is known as the genetic code.

A codon is a triplet of RNA nucleotides that codes for a particular amino acid. To the ribosome, where translation takes place, the tRNA transports certain amino acids. During translation, the anticodons in the tRNA bind to the codons in the mRNA templates. It is essential for the codon and anticodon to interact in order to pair the codon with the appropriate amino acid.

In mRNA, each trio of nucleotides is referred to as a codon, and each codon designates a certain amino acid (hence, it is a triplet code).

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