BIOLOGY HIGH SCHOOL

The germ cell has 2 sets of chromosomes, and the four gametes will each have one set of chromosomes. ​​​​​​​ To have enough DNA for each gamete, the DNA in the germ cell must be gizmo

Answers

Answer 1
Answer:

Answer:

This question lacks options, the options are:

A. Halved

B. Doubled (x2)

C. Quadrupled (x4)

D. Octupled (x8)

The answer is B.

Explanation:

Via the process of meiosis, gametes are formed in order for sexual reproduction to occur. However, the chromosomal content of the gametes are reduced by half. According to this question, a germ cell is said to have 2 sets of chromosomes i.e. diploid, meaning that each daughter cell after meiosis will have one set of chromosome (haploid, n).

However, before any form of division can occur, the DNA (genetic material) of the cell must be replicated i.e. doubled in order to ensure that each resulting gamete has enough chromosomes. This is applicable in this question as well as the DNA in the germ cell must be DOUBLED (×2) via replication in order to have enough DNA for each gamete.

Answer 2
Answer:

Final answer:

The germ cell, or diploid cell, duplicates its DNA to create haploid cells (gametes) with one set of chromosomes each. This process of duplication is part of meiosis, ensuring that offspring receives the correct number of chromosomes from each parent.

Explanation:

The germ cell, a type of diploid cell, contains two sets of chromosomes. Each gamete, typically described as haploid cells, needs to have one set of chromosomes. To have enough DNA for each gamete, the DNA in the germ cell must be duplicated, which is a part of the process of meiosis.

This process of meiosis helps reduce the number of chromosome sets in each cell so that when two gametes (like a sperm cell and an egg cell) combine during fertilization, they can create a new diploid cell with two sets of chromosomes - one from each parent. If meiosis didn't occur, the resulting cells would have too many chromosomes, which is not sustainable for life.

Most animals and plants are diploid, meaning they have two sets of chromosomes in their body cells or somatic cells. However, gametes, the reproductive cells, are haploid and carry just one set. This ensures that upon fertilization, the embryo will have the correct number of chromosomes.

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How long does it take for a new species to arise? Have we ever witnessed a new species arising - like in any laboratories or otherwise - possibly with creatures with short life spans? Does it happen all the time, or is it incredibly rare?

Answers

Arising of a new species is not a rare thing. Organisms are always in a competition to survive long. Speciation, as what they call it, is happening from time to time because organisms evolve in order to adapt to the environment where they are in. However, this process is a slow one thus it is almost impossible to see a new species arising.

Bones protect internal organs and help the body move. true or false?

Answers

True. This is because bones provide the structural support and act as levers- along with your muscles, you can move. They protect internal organs by creating a hard framework around them, in a way.
Hope that helped you.

Which of the following is not a characteristic of an animal?A.) They are heterotrophic
B.) They are photosynthetic
C.) They are multicellular
D.) Their cells contain a nucleus

Answers

B . Thy are photosynthetic
Only plants are photosynthetic as they make their own food through the process photosynthesis not animals.

 Hope i helped .....

Final answer:

The characteristic that is not typical of an animal is B.) They are photosynthetic. Animals are heterotrophic, consume organisms for energy, and do not photosynthesize like plants.

Explanation:

The characteristic among the provided options that is not typical of an animal is B.) They are photosynthetic. Animals are heterotrophic, signifying that they need to consume other organisms for energy, unlike plants which are photosynthetic and can generate their own food using sunlight.

Additionally, Animalia Kingdom is classified by its members being multicellular and having cells with a nucleus. B.) They are photosynthetic is a characteristic more closely associated with plants than animals.

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1.If you cross two pea plants that are heterozygous for flower color (Pp), what is the percent chance that the offspring will be white? 2.Round peas (R) are dominant to wrinkled peas (r). If a pea plant with the genotype Rr is crossed with a pea plant with wrinkled peas, what are the odds that the offspring will have wrinkled peas?

Answers

The principle of dominance. The gene for purple flowers is dominant, while the gene for white flowers is recessive. We know this because both flowers are homozygous, meaning their genes are the same
1. There is a 25% chance that the flowers will be white.

2. There is a 50% chance that the peas will be wrinkled.

Without the rough ER, cells would ?

Answers

Hi There! :)

Without the rough ER, cells would ?

The endoplasmic reticulum serves many functions thus without it all those functions would vanish leaving the cell incapable to manage properly resulting in death. The endoplasmic reticulum is divided into the smooth and rough endoplasmic reticulum; both vary in function. First, the smooth ER serves as a structure which catalyzes foreign substances to make them less harmful, i.e. detoxification. The rough ER serves as a structure which performs protein synthesis.

In 1831, Charles Darwin visited the Galapagos Islands. While observing the giant land tortoises that lived on these islands, Darwin noted that the shape of the tortoise shell varied depending on which island the tortoise lived. Tortoises on one island had round shells, for example, whereas tortoises on a neighboring island had more flattened, saddle-shaped shells. Which statement BEST summarizes Darwin's explanation for these differences?A) Random mutations caused the shape of the shells to fluctuate periodically.
B) The shape of the tortoise shell varied because the predators on the islands were different.
C) The particular shape of the shell was best suited for the island on which the tortoise was living.
D) Tortoises who used their shells in special ways caused the shells to become larger, rounder, or flatter.

Answers

B) The shape of the tortoise shell varied because the predators on the islands were different. 

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Darwin’s theory of evolution 
1)      Variation exists among individuals within species. 
2)      Organisms produce more offspring than the environment can support 
3)      Competition exists among individuals.
 4)      The organisms whose variations best fit them to the environment are the ones who most likely to survive, reproduce, and pass those desirable variations on to the next generation. 
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