BIOLOGY HIGH SCHOOL

Relate the human genome to blueprints for a house?

Answers

Answer 1
Answer: A genome is an organisms complete set of DNA. DNA is what makes you, you. It provides the "blueprints" for what proteins need to be created in order to make each organism. Thus, the human genome is like the blueprints of a house as they are both the starting point for each new creation.

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20 heterozygous purple flowering pea plants are crossed. If purple is dominant over white, what are the expected phenotypic results?

Answers

Let's call the colour alleles C for dominant purple, and c for recessive white.

We have crossed Cc with Cc.  So if we put that in a Punnett square, we'd have a CC, two Cc and a cc.  That would give us a 3:1 ratio of purple to white, so you'd expect 15 purple and 5 white flowers. :)

What male reproductive structure releases sperm into the vas deferens?

Answers

The answer is epididymis.

Testicles contain seminiferous tubules, in which sperm is produced, and an epididymis, in which sperm matures. Mature sperm passes through the epididymis to the vas deferens. There, it combines with a liquid secretion from the seminal vesicles and continues through the prostate gland to the urethra. Sperm containing fluid is called semen and it is ejected through the urethra.

The trend of declining ecosystem resource availability and increasing demand for these resources can best be countered by _______.

Answers

The answer is applying sustainable development.

The trend of declining ecosystem resource availability and increasing demand for these resources can best be countered by applying sustainable development. Sustainable development refers to the development in which the needs in the present is meet without compromising the future generation's ability to meet their own needs.

Answer:

C

Explanation:

What may occur when the burning of fossil fuels releases gaseous nitrogen oxides and sulfur dioxides into the atmosphere?-deforestation
-sharp decrease in global temp
-faster rate of photosynthesis
-acid rain

Answers

Acid rain occurs when the burning of fossil fuels releases gaseous nitrogen oxides and sulfur dioxides into the atmosphere.

Answer:

-acid rain

I hope this helps

Which best describes a difference between transcription and DNA replication?A. DNA replication produces mRNA.
B. They use different nucleotide bases.
C. Transcription does not use DNA.
D. Only DNA replication happens in the nucleus.

Answers

Ans. (B). They use different nucleotide bases.

DNA replication involves synthesis of DNA molecules, while transcription is a process that involves synthesis of RNA molecules. In both processes, DNA acts as template and provides information for synthesis of new daughter DNA or RNA strand.

Process of replication and transcription differs from each other as each process uses different nucleotide bases. This is because, nucleotide bases in DNA include adenine, guanine, cytosine, and thymine, while in RNA uracil is present instead of thymine along with three similar bases.

Thus, the correct answer is option (B).

The answer is: [B]:  They use different nucleotide bases.
______________________________________________________
Specifically, DNA replication uses thymine; whereas transcription uses uracil.
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A. In a purebred tall plant, what gametes are possible?

Answers

A dwarf is a recessive trait. In order for the plant to be shorter, it would have to have 2 recessive alleles. The plant is also purebread so it wont contain the tall allele. The gametes that are possible are tt.

What do you mean by gametes?

A gamete is a reproductive cell of an animal or plant. In animals, female gametes are called ova or egg cells, and male gametes are called sperm. Ova and sperm are haploid cells, with each cell carrying only one copy of each chromosome. During fertilization, a sperm and ovum unite to form a new diploid organism.

Moreover, the term haploid can also refer to the number of chromosomes in egg or sperm cells, which are also called gametes. In humans, gametes are haploid cells that contain 23 chromosomes, each of which a one of a chromosome pair that exists in diploid cells.

Therefore, the primary function of gametes is to carry out fertilization in sexually reproducible organisms. During fertilization, a male gamete (sperm/spermatozoa) fuses with female gamete.

Learn more about gametes:

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A dwarf is a recessive trait. In order for the plant to be shorter, it would have to have 2 recessive alleles. The plant is also purebread so it wont contain the tall allele. The gametes that are possible are tt.
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