QUESTION 3 Which of the following statements is true regardng neurulation? The notocord is formed from ectoderm The notochors is present throughout development and disappears after birth The notochord produces signals that induce neural plate formation The notochord produces signals that induce neural tube formation

Match the asexual reproductive strategy to its definition fission gemmulation budding fragmentation parthenogenesis [Choose ] [Choose ] both reproductive systems can be found in the same organism enhances reproductive success by encouraging genetic diversity the organism breaks into one or more pieces uses unequal mitosis relies on mitosis to produce "daughter cells" the female transforms herself into a male cells are surrounded by a resistant capsule no sperm required for progeny to be made [Choose ] [Choose ] <

What is a dauer larva ? It's a larva from a special variant of C. elegans that was first identified in samples from soil in Germany It is a larva that shows accelerated development in highly nutritious environments Dauer is just the technical term for "hermaphrodite" - so dauer larva means hermaphrodite adult It's a larva that arrests development in a low metabolic and enduring stage, caused by harsh environmental conditions. The larva will remain in the dauer stage until the conditions improve, at which point they'll resume development.

8. The major event in the embryonic development of animals that results in a layered embryo is called Group of answer choices choanoflagellation transmogrification ecdysis compartmentalization desagellation gastrulation gelatinization cephalization

Match each hypothesis to its theory. Preformationism Genetic information is inherited from one parent or the other, not both. Pangenesis concept Reproductive cells have complete genetic codes for their species. Germ-plasm theory Cells in different tissues have unique genetic codes that are transferred to the gonads to produce gametes.

What critical developmental process/es are altered following retinoic acid-exposure, which may cause protrusion of the spinal cord through the vertebral arches? Select one or more: O A. Primary neurulation, where the neural plate creases inward until the edges come in contact and fuse. O B. Secondary neurulation, where the tube forms by hollowing out of the interior of a solid precursor. O C. Regulation of neural crest migration from the neural tube to generate segmental ganglia. O D. Abnormal somite formation affecting the development of muscles of the back.

The route followed by a sperm from production to fertilization in a flowering plant is: -A sperm cell, enclosed in a pollen grain with another sperm, is produced in the filamentIt is transported to a stigma where it passes through a pollen tube that grows down the style to the ovaryThe pollen grain enters the ovule and joins with the egg cell. -A sperm cell is produced in the antherIt is transported to a stigma where it becomes enclosed along with another sperm cell into a pollen grainThe pollen grain grows down the style to the ovaryIt enters the ovule and joins with the egg cell. -A pollen grain is produced in the pistil, which explosively ejects it into the airThe pollen grain is transported to a stigma where it forms two sperm cells.One of the sperm cells passes through a pollen tube that grows down the style to the ovaryThe sperm enters the ovule and joins with the egg cell. -A pollen grain is produced in the antherIt is transported to a stigma where it produces two sperm…

Question 11 10. In the center of the embryo sac are the: ovules. synergids. eggs. O polar nuclei. O antipodals.

QUESTION 3 What causes the Wolffian duct to develop into male reproductive structures? This will happen in the absence of anti-Wolffian hormone This will happen in the absence of estrogens This will happen in the presence of high levels of androgens This is the default pathway

-4. In the diagram below, the stages of development in a frog embryo are NOT arranged in the correct order. In what order should they be placed to show the normal sequence of development in the embryo? What process is occurring in this diagram? B. D Dorsal lip of blastopore Dorsal lip of blastopore Dorsal lip of blastopore Dorsal lip blastopon