Fertilization produces a diploid cell is the common phase that occurs in the life cycle of both the moss and fern. Hence, the correct option is D.
Fertilization refers to the fusion of haploid gametes of the male and female to produce a diploid cell, which is called zygote.
Mosses belong to bryophytes and ferns belong to class pteridophytes. Both undergo sexual and asexual reproduction. They undergo asexual reproduction by the production of spores, while sexual reproduction with the formation of gametes.
Both undergo oogamous mode of sexual reproduction with the formation of zygote that is diploid in nature. It is facilitated by the fusion of non-motile female gamete with the motile male gamete, which is termed as sperm.
Therefore, the correct option is D.
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Answer;
D) Fertilization produces a diploid cell.
Explanation;
In mosses; A single spore germinates to form a branched, filamentous protonema, from which a leafy gametophyte develops. The gametophyte bears organs for sexual reproduction. Sperm, which are released by the mature antheridium (the male reproductive organ), are attracted into the neck of an archegonium (the female reproductive organ). Here, one sperm fuses with the egg (fertilization) to produce the diploid zygote.
The life cycle of a fern is very different from the life cycle of many other plants. Ferns have an intermediate stage, called a gametophyte, which then grows into a mature fern. During Gametophyte stge, the spores are produced on the underside of mature plants. These will germinate and grow into small, heart-shaped plants called gametophytes. The gametophytes produce both sperm and egg cells, and will fertilize itself, or others to yield a diploid cell.
B). Genes are expressed differently in liver cells and hair follicles
C). Hair follicle cells contain different genes from liver cells
D). Hair follicle cells do not produce DNA, but liver cells do
Answer:
B). Genes are expressed differently in liver cells and hair follicles
Explanation:
In given organisms all the cells of the body have the same number of genes, however, their activity varies due to differential expression of genes.
The differential expression of genes is regulated by several factors, such as histone modifications, DNA, etc. which may silence or activate the genes differentially in different cells.
Since the hair cells and liver cells of the organisms will have the same genes, they only vary due to the differential expression fo the genes.
Answer:
B) Genes are expressed differently in liver cells and hair follicles
Explanation:
Cell differentiation helps produce different cells with different functions that express different genes in the genome.
Liver cells and hair follicles are an example of cell differentiation creating different functions in multi-celled organisms.
B.monosaccharide
C.dissacharide
The milk sugar, lactose, is made up of glucose and galactose it is a dissacharide.
Thus, A disaccharide is the sugar that results from the glycosidic connection of two monosaccharides, often known as a double sugar or biose.
Disaccharides are simple sugars that are soluble in water, just like monosaccharides. Maltose, lactose, and sucrose are three typical examples.
One of the four chemical classifications of carbohydrates (the others being monosaccharides, disaccharides, oligosaccharides, and polysaccharides) is disaccharides. Disaccharides having 12 carbon atoms, such as sucrose, lactose, and maltose, have the general formula C12H22O11.
Thus, The milk sugar, lactose, is made up of glucose and galactose it is a dissacharide.
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Answer:
One allele is on one chromosome, and the other is in the same position (locus) on the homologous chromosome.
Explanation:
The genotype of an organism refers to the genetic makeup or complete set of genes. The genes control the trait of an organism and exist in an organism in their alternative form called alleles.
Since the alleles are the alternative form of a gene, therefore, they must be present at the same position called a locus.
These alleles are present on the homologous chromosome in which each homologous chromosome is contributed by each parent.Therefore when the genotype is aa then a and a allele will be present on homologous chromosomes in the same position.
Thus, the selected option is correct.
Answer:An alternative version of a gene
Explanation:
Answer: Light intensity
Explanation:
The total amount of nutrient( organic material) which is left after respiration, in order to support the other levels of the food chain is known as the net primary productivity.
More than 90% of the producers are the pytoplanktons that performs the process of photosynthesis.
The intensity of light falling on the water surface affects the rate of primary productivity.
Answer:
the answer is B beaks, finches.
Explanation:
A person does have basic human rights and one is the freedom of expression. Though this is the case, we should understand that our right to freely express ourselves (from political to religious views), it does not necessarily give us the right to impede another person’s. A play with words can easily hurt or even harass other people, and in return may be a form of human right violation.