BROOKER BIOLOGY
5th Edition
ISBN: 9781307656152
Author: BROOKER
Publisher: MCG/CREATE
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 33, Problem 8TY
Naturally occurring identical twins are possible only in animals that
- a. have spiral cleavage.
- b. have determinate cleavage.
- c. are protostomes.
- d. have indeterminate cleavage.
- e. have spiral and determinate cleavage and are protosomes.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Which of the following is not true about frogs eggs and blastula formation? Choose all possible answers
a. denser yolk in the animal hemisphere.
b. Cleavage is holoblastic
c. first cleavage plane is meridional and bisects the gray crescent, revealing the existence of some factor(s) that determine(s) the initial orientation of the cleavage spindle.
d. first furrow also marks the plane of bilateral symmetry in the body
e. All four blastomeres differ in sizes.
f. All of the following are true about eggs of frogs.
Which of the following is not true about starfish eggs? Choose all possible answers
a. eggs are fertilized prior to completion of the first meiotic divisions.
b. eggs are generally less yolky and therefore cleave meroblastically.
c. first two cleavage planes are meridional
d. Each quartet (blastomeres) occupies a plane lying perpendicular to the animal-vegetal axis.
e. All are true about the starfish eggs.
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
Chapter 33 Solutions
BROOKER BIOLOGY
Ch. 33.2 - Core Skill: Connections Look back to Figure 25.8....Ch. 33.2 - Prob. 2CSCh. 33.3 - Prob. 1CSCh. 33.3 - Prob. 1EQCh. 33.3 - Prob. 2EQCh. 33.3 - Prob. 3EQCh. 33 - Prob. 1TYCh. 33 - Prob. 2TYCh. 33 - Prob. 3TYCh. 33 - In triploblastic animals, the inner lining of the...
Ch. 33 - Prob. 5TYCh. 33 - Prob. 6TYCh. 33 - Prob. 7TYCh. 33 - Naturally occurring identical twins are possible...Ch. 33 - Prob. 9TYCh. 33 - A major finding of recent molecular studies is...Ch. 33 - Fierce debate centers on whether ctenophores or...Ch. 33 - Why was the evolution of a coelom important?Ch. 33 - Prob. 3CQCh. 33 - Discuss the many ways that animals can affect...Ch. 33 - Prob. 2COQ
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- In animal sexual reproduction the gametes are formed by the process of a. meiosis. b. mitosis. c. fusion. d. binary fission.arrow_forwardIn humans, gametogenesis results in the formation ofa. diploid egg and sperm cells.b. gametophytes.c. sporophytes.d. haploid egg and sperm cells.e. a zygote.arrow_forwardIn animals, a key difference between spermatogenesis andoogenesis is thata. only oogenesis involves meiosis.b. only spermatogenesis involves meiosis.c. spermatogenesis produces four sperm, whereas oogenesisproduces only one egg cell.d. None of the above describes a difference between the twoprocesses.arrow_forward
- The Brachyury and Tbx5 in vertebrates and the Ap3 gene in flowering plants a. are examples of Hox genes. b. are examples of co-opting a gene for a new function. c. are homologues for determining the body plan of eukaryotes. d. help regulate the formation of appendages.arrow_forwardWhich of the following statements relating to axis formation in chickens is FALSE? a. Henson's node secretes proteins that antagonize BMPs. b. The side of the epiblast facing the negative, basic albumin will become the ventral side of the embryo. c. Cells of the posterior marginal zone secrete Nodal to initiate the primitive streak. d. Water and sodium ions are transported from the albumin through the blastodisc cells and into the subgerminal space.arrow_forwardCleavage... A. Is a developmental stage consisting of a cell layer surrounding a fluid-filled space B. Is a specialized form of cell division that partitions the cytoplasm of a fertilized egg C. Refers to the fusion of haploid gametes to give a diploid zygote D. Produces an embryo with either two or three distinct cell layers E. None of the abovearrow_forward
- Humans produce skin cells by mitosis and gametes by meiosis. Which of the following statements about the nuclei of skin cells is correct? a. They contain half as much DNA as the nuclei of gametes produced by meiosis. b. They contain four times as much DNA as the nuclei of gametes produced by meiosis. c. They contain the same amount of DNA as the nuclei of gametes produced by meiosis. d. They contain twice as much DNA as the nuclei of gametes produced by meiosis.arrow_forward1. Which of the following is correct regarding the reptilian and mammalian vertebra? A. Their cervical vertebrae restrict their neck movement. B. They have seven cervical vertebrae C. The 2nd vertebra is known as the atlas. D. They have a variable number of cervical vertebrae depending on the length of the neck. 2. Which part of the egg lies close to the animal pole? A. Ribosome B. Mitochondria C. Nucleus D. Centriole 3. TRUE or FALSE. Vertebrates that evolved from fish pass through similar embryonic stages. 4. TRUE or FALSE. Chimpanzees and humans have the greatest number of sweat glands.arrow_forwardIn animals, which of the following distinguishes meiosis from mitosis? a. Meiosis is a form of asexual division, whereas mitosis is a form of sexual division. b. In mitosis, single loops of DNA are copied, whereas meiosis involves multiple linear chromosomes. O c. Mitosis is used for the repair of cells, whereas meiosis creates cells for sexual reproduction. d. Mitosis occurs in prokaryotic cells, whereas meiosis occurs in eukaryotic cells.arrow_forward
- Which of the following statements CORRECTLY describes the contribution of sperm to thezygote for most vertebrate species?A. flagella, acrosome vesicle,B. mitochondria, haploid DNAC. centriole, haploid DNAD. acrosome vesicle, mitochondriaarrow_forward5arrow_forwardMitosis occurs in which of the following situations? (select ALL that apply) A. Yeast cells reproducing asexually B. Certain plants that reproduce asexually C. Human adults who have stopped growing taller. D. The production of gamete cells E. Young multicellular organisms growing larger (normal growth) F. The development of a zygote after fertilization has occurred.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Biology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage Learning
Biology (MindTap Course List)
Biology
ISBN:9781337392938
Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher:Cengage Learning
Discovering the tree of life | California Academy of Sciences; Author: California Academy of Sciences;https://www.youtube.com/watch?v=AjvLQJ6PIiU;License: Standard Youtube License