Describe and label a nematocyst and the cell containing it. Describe how nematocysts fire. How does the firing mechanism and structure vary phylogenetically [among classes]?

Q: Name the organ of sexually reproducing animal.

A: Sexual reproduction is the production of a new organism in which the male gametes fuse with a female…

Q: The Mullerian ducts in female mammalian embryos develop into…   a)   The vas deferens   b)   The…

A: During embryonic development, the reproductive system goes through a complex differentiation process…

Q: The visual pigment of a cone cell is

A: The eye is a complex sense organ. A layer of receptors is present in each eye along with a lens…

Q: What primary germ layer gives rise to the notochord? What is the function of the notochord?

A: Notochord It is a flexible, rod shaped body found in embryos of all chordates.

Q: Why is a second polar body expelled after fertilisation?   a)   To remove excess cytoplasm   b)…

A: The second polar body is a small, non-functional cell that is produced during oogenesis after the…

Q: How could you tell if a prepubertal female had an overly active zona reticularis?

A: Adrenal gland cortex is divided into  Zona glomerulosa Zona fasciculata  Zona reticularis  Zona…

Q: Nematocysts are  a.) reproductive cells b.)excretory organs c.) set of muscle cells d.)…

A: Answer  (e). Defensive cells

Q: During what embryonic stage can morphogenesis be seen?   Question 9 options:   a)  The morula…

A: Basically morphogenesis means the development of organs and organ system by the process of…

Q: Identify the stage of meiosis diploid cells of this species have 3 homologous pairs of chromosomes a…

A: Introduction  Cell division is the process by which a single cell divides into two or more daughter…

Q: All of the following describe a gamete, EXCEPT: a) sperm b) haploid c) zygote d) egg

A: Gametes are an organism's reproductive cells. They are also referred to as sex cells. Female gametes…

Q: What form of amplexus did you see with the Panamanian Golden frogs?

A: Amplexus  Amplexus is a type of mating behaviour in externally fertilizing animals.

Q: Most species reproduce sexually. Some species are entirely asexual, while others can reproduce in…

A: There are two main types of reproduction that are seen in living organisms, Sexual and Asexual Modes…

Q: In Deuterostomes, nutrient molecules (monomers) are taken in to the space between the endoderm and…

A: Option (a) is incorrect because, in Deuterostomes, nutrient molecules (monomers) are taken up into…

Q: Illustrate the top-to-bottom and head-to-tail orientation of the fruit fly embryo.

A: The fruit fly is known as Drosophila melanogaster is a common fly found on fruits like ripe bananas.…

Q: Unlike mitosis, meiosis in male mammals results in the formation of

A: Answer: MEIOSIS = It is the cell division where a cell is divides in to four haploid cells, It is a…

Q: Identify four functions of invertebrate neurohormones and describe the regulation of insect…

A: The four functions of invertebrate neurohormones are as follows- 1. Reproduction 2. Molting3.…

Q: With the whitefish blastual cell during interphase, prophase, metaphase, anaphase, telophase and…

A: Whitefish blastula cells are commonly used in cell biology research due to their high mitotic index,…

Q: Describe the mode and mechanism of nematocyst discharge in Cnidari

A:

Q: In the sexual reproducing phyla Nematoda, are the animal’s hermaphrodites or separate  sexes?

A: Hermaphrodites are the animals which have both the sexes present in the same body i,.e they are able…

Classification of Marine Organisms

Classification is a way of categorizing organisms that enables an easy process of identification of such organisms. All living things are classified by grouping them under specific categories. The grouping is done based on the close relativeness of the organisms. The classification tool requires knowledge of characteristics, differences, and similarities between different organisms.