Mature Medusa 1. Look at the life cycle diagram of a jellyfish species on the right. Immature Medusa a) Indicate which type of reproduction (asexual or sexual) takes place at each of the four stages indicated on the diagram. Explain how you can tell. Fertilised Egg 4 1 Blastula b) What are the advantages of having Medusa Planula - Bud Larva both asexual and sexual reproductive capabilities? c) Under which circumstances do many organisms, such as rotifers and single-celled plankton, switch from asexual to sexual 3 Colony Polyp Bud Polyp reproduction? Why? Frustule Bud Frustule Larva

Mature Medusa 1. Look at the life cycle diagram of a jellyfish species on the right. Immature Medusa a) Indicate which type of reproduction (asexual or sexual) takes place at each of the four stages indicated on the diagram. Explain how you can tell. Fertilised Egg 4 1 Blastula b) What are the advantages of having Medusa Planula - Bud Larva both asexual and sexual reproductive capabilities? c) Under which circumstances do many organisms, such as rotifers and single-celled plankton, switch from asexual to sexual 3 Colony Polyp Bud Polyp reproduction? Why? Frustule Bud Frustule Larva

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

See similar textbooks

Similar questions

1) Which statement below about asexual reproduction is FALSE? a) With asexual reproduction, offspring are genetically equivalent to the parent b) Asexual reproduction requires no partner c) Asexual reproduction requires meiosis d) Some organisms can reproduce both sexually and asexually
In Ascaris, meiosis and oocyte maturation occur at the same time. Describe the stages that oocytes go through as they pass from the ovaries to the uterus in these worms.
Give typing answer with explanation and conclusion
2)Why are organisms that broadcast spawn useful for studying fertilization & development? a)Fertilization does not require multiple gametes b)Fertilization occurs outside the bodies of the parents, so it can be directly observed c)Fertilization is observable because the eggs are large enough to see d)Fertilization occurs without the need for parents
Let's Check Activity 9. Let us try to check your understanding of the discussion. Read the questions carefully. Encircle the letter that corresponds to the correct answer. 1. Which of the following pairs share 50% of their genes? Any two siblings A pair of dyzogotic twins A pair of monozygotic twins a and b 2. Regarding types of multiple pregnancy, which of the following are true? a. Dizygotic twins result from fertilization of different oocytes by the same sperm. b. Monozygotic twins result from mitotic division of a single zygote into 'identical' twins. c. Dizygotic twins result from the division of a single fertilized egg. d. Monozygotic twins result from 2 egg cells merged together, eventually fertilized by a sperm cell. 3. Fraternal twins make up approximately. of the twin population.
14. Nematode Life Cycle Matching: Match each of the descriptions below with the correct nematode worm species (A-D). Note that some descriptions may not apply to any of the 4 species (in which case just write “none") and some descriptions may apply to multiple worms species (in which case write the letters of all applicable species). (A) Dirofilaria (heartworms) (B) Dracunculus (Guinea worm) (C) Ascaris (D) Hookworms 1. Life cycle includes only a single host 2. The infective stage is a free-living larva that can enter the skin directly 3. On target to become the first parasite-caused human disease to be eradicated 4. Has an arthropod intermediate host 5. Traditional treatment involves winding the female worm around a matchstick 6. Infections can be prevented by not defecating on soill improving sanitation of soil 7. Female lays eggs around the anus of the host 8. Produce microfilaria that circulate in the blood 9. Has multiple larval stages and a snail intermediate host 10. Migrate…
1.Define a life cycle. 2. Explain briefly the difference between asexual and sexual reproduction. 3. What is the difference between a spore, a sperm cell and an egg cell?
Gastrulation... A. Is a specialized form of cell division that partitions the cytoplasm of a fertilized egg B. Refers to the fusion of haploid gametes to give a diploid zygote C. Produces an embryo with either two or three distinct cell layers D. Is a developmental stage consisting of a cell layer surrounding a fluid-filled space E. None of the above
Human Reproductive Systems Diagram 1 Diagram 2 A H I J K C- 'D 1. What is the function of the reproductive system? 2. Which diagram above represents the male reproductive system? 3. Which diagram above represents the female reproductive system?
1. Define sessile. Name an invertebrate with a sessile adult stage. 2. Sponges have specialized cells called collar cells. Describe how collar cells are specialized for the functions they serve. 3. What is a nematocyst? What is its function? 4. How do coral reefs form? 5. How do free-living nematodes contribute to the carbon cycle? 6. Describe the basic body plan of a mollusk. 7. What are gills? What is their function?
Cleavage is a unique type of cell division that occurs____ a ) during meiosis I only b) during meiosis II only d ) after fertilization of the egg e ) in both meiosis I and II
Describe the life cycle of the human hookworm? How was john D. Rockfeller and southern US commerce involved in this story?how far away from a pile of poop can a hookworm crawl before dying? How did Rockfeller's medical investigators eradicate the hookworm problem, as well as many excrment- related parasitic disease?