Answer : The correct answer for the blank is -
a. zygote.
A zygote can be described as a diploid cell that is produced by the fusion of gametes (from each parent such as egg and sperm). The process of fusion is called fertilization and zygote is also called fertilized ovum/egg.
Zygote undergoes multiple rounds of proliferation (cell division through mitosis) and ultimately differentiates to produce the highly advanced stage, fetus (which is fully developed baby).
Thus, a zygote is formed when sperm meets egg and contains all DNA necessary to create a person.
B.)temporal isolation
C.)geographic isolation
D.)behavioral isolation
Answer:
b
Explanation:
temporal isolation
different alleles.
B. Plants can grow to a wide range of
heights.
C. Humans either have attached
earlobes or detached earlobes.
D. Human body mass is controlled by
many genes.
The Mendelian trait are those controlled at only single gene locus. The Mendelian trait have two alleles (one form each parent), out of which one allele is dominant while the other is recessive. The dominant allele will express in both homozygous and heterozygous conditions while the recessive allele will express itself only in homozygous condition. An example of the human Mendelian trait is the attached or detached earlobes. A human will either have attached earlobe or detached earlobe.
Hence, the correct answer is 'Option C - humans either have attached earlobes or detached earlobes'.
It's insightful learning.
2. an early stage in the development of an animal or plant
(hydroskeleton)
3. the period of time offspring is carried in the womb before birth
(chitin)
4. gamete-producing organ in animals
(gonad)
5. support and movement structure of animals that is maintained by water or body fluid (gestation period)
6. an early growth stage or phase of life of an organism that undergoes metamorphosis
(embryo)
Answer:
a polysaccharide-based substance that forms the exoskeleton of arthropods
(chitin)
an early stage in the development of an animal or plant
(embryo)
the period of time offspring is carried in the womb before birth
(gestation period)
gamete-producing organ in animals
(gonad)
support and movement structure of animals that is maintained by water or body fluid
(hydroskeleton)
an early growth stage or phase of life of an organism that undergoes metamorphosis
(larva)
Answer:
The presence of DNA, RNA, and membrane components suggest that the cell was destroyed during the process of secretion. This is consistent with a holocrine type of secretion.
Explanation:
Holocrine is a term used to classify the mode of secretion in exocrine glands in the study of histology. Holocrine secretions are produced in the cytoplasm of the cell and released by the rupture of the plasma membrane, which destroys the cell and results in the secretion of the product into the lumen. Skin glands in mammals are classified into holocrine (e.g., sebaceous glands), and merocrine (e.g., sweat glands). The sub mandibular or chin gland of rabbits is a modified sweat gland (apocrine; Lyne et al., 1964) developed from the external root sheath of the hair follicle and attached to it
The secretion described is likely an 'apocrine secretion', a type of glandular secretion involving the release of cytoplasmic materials. This process includes the release of DNA, RNA and membrane components like phospholipids.
The secretion you've described is most likely an instance of a cell's apocrine secretion, which is a form of glandular secretion that involves the release of cytoplasmic materials. In this type of secretion, parts of a cell's cytoplasm (which contains DNA and RNA) are pinched off into the secretory vesicle, along with membrane components like phospholipids. Once the vesicle reaches the cell surface, it fuses with the plasma membrane and the contents are released outside the cell. This type of secretion is common in mammary glands and some sweat glands in humans.
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