View this time-lapse movie(http://openstaxcollege.org/l/conceptus) of a conceptusstarting at day 3. What is the first structure you see? Atwhat point in the movie does the blastocoel first appear?What event occurs at the end of the movie?

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A: In Cnidarians venom glands are small capsules filled with coiled, barbed threads that often contain…

Q: Why are cephalochordate considered classical

A: Cephalochordates are the marine fish-like invertebrates belonging to the subphylum Cephalochordata.…

Q: Sponges are.. Select the correct response: Plankton Nekton Sessile Pelagic

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A: A body cavity is a fluid-filled space inside the body that protects internal organs and are…

Q: Define the word antheridium?

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Q: Which is theextraembryonic membranewhose function is to storenitrogen wastes of theembryo? Is this…

A: The membrane that is known to assist the developing embryo is known as an extraembryonic membrane.…

Q: What is external cephalic version?

A: External cephalic is a type of external rotation of fetus in utero.The physician rotates the fetus…

Q: Sawfly larvae differ from Lepidoptera caterpillars | by having more prolegs. | by having…

A: Sawfly larvae ( belonging to order Hymenoptera) are immature stages of wasps or bees that have…

Q: The spiracles can be opened or closed. Why might this be adaptive?

A: The respiratory system of an insect is the biological system through which it introduces respiratory…

Q: Beings from four phyla ofthe animal kingdom “breath”(do gas exchange) bydiffusion. Which are…

A: Invertebrates are animals having no backbone. They are the most widespread animal on earth. Examples…

Q: Ductless glands are known as___?

A: There are two glandular systems in humans namely, a) endocrine gland b) exocrine gland

Q: A coelom (Gr. koilos, cavity) is a body cavity completely surrounded by mesoderm; the band of…

A: Deutrosomes in the greek mean second mouth. It makes a nephrozoa clade with protostomia clade. They…

Q: How many tissue layers does Daphnia have?

A: Daphnia are planktonic crustaceans that belong to the Phyllopoda which is characterized by flattened…

Q: Elytra Pterostigma Raptorial Fossorial Exopterygote Endopterygote Vas deferens Spermatheca…

A: Invertebrates belonging to the class Insecta are pancrustacean hexapods, or insects. They make up…

Q: Define cephalochordates

A: Cephalochordates can be defined as the group of organisms that belongs to the phylum Chordata and…

Q: Explain the Type of protostome that produces atrochophore larva ?

A: Larvae are seen across the animal kingdom and are a specific juvenile form before they metamorphose…

Q: Which of the following is NOT characteristic of both ctenophores and cnidarians? O C. epidermis A.…

A: Cnidarians are the animals which belongs to the phylum cnidarian which under the kingdom animalia…

Q: Which is the odd man out based on the third appendage? Asiomorpha, Tachypleus, Menalaides, or…

A: An appendage (or outgrowth) is an external body part, or natural prolongation, that protrudes from…

Q: What is labelled diagram of Necator americanus ?

A:

Q: Explain how cnidocytes with their nematocysts function in food capture and defense.

A: Cnidocytes are specialized cells and these define the phylum Cnidaria. These contain an explosive…

Q: What do you mean by elytra?

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Q: Explain C. elegans embryos.

A: Answer: Introduction: The nematode worm Caenorhabditis elegans is a minor and organized organism.

Q: Compare and contrast morula, blastula, gastrula, embryo and fetus.

A: The sequential and highly regulated processes that occur from the fertilisation of an egg (zygote)…

Q: Answer the following questions briefly but concise: 1. Justify the statement " Members of the Class…

A: Note: Upload 2nd question separately, here i have given answer of 1st question. Answer: 1.…

Q: Which structure stops large particles from going into the cephalochordates pharynx? A. mucous net…

A: Cephalochordates, urochordates, and vertebrates are the three major groups of chordate animals.…

Q: Question 25 of 29 Flame cells are associated with excretory organs of... Select the correct…

A: As per our guidelines, we are supposed to answer only one question. Kindly repost other question as…

Q: After the morula stage whatis the next stage? What is themorphological feature thatdefines this…

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Q: What is the distinguishing characteristic of each stage in the embryonic development of the sea…

A: Sea urchins are marine invertebrates that show in vitro fertilization where male and female sea…

Q: Siphonicle neck in ammonoidea is directed forwads Select one : True False

A: Ammonoidea These belong to the class of Cephalopoda. These are extinct marine molluscs which are…

Q: 1: Make a diagram of the life cycle of a diagenetic fluke worm (Class Trematoda).  2: Highlight the…

A: Liver fluke is a parasite called Fasciola hepatica. The liver fluke completes its life cycle within…

Q: How are the specific cell types patterned correctly? How does the flatwormtell the posterior…

A: Planaria are flatworms that reproduce asexually through fragmentation (not binary fission, which is…

Q: in a wolf house spider, lycosa   Locate the spinnerets at the posterior end of the abdomen. What…

A: Spinnerets are organs located outside the abdomen of spiders that produce silk fiber that helps them…

Q: All of the following develop from the same germ layer, except __________.   brain   thyroid gland…

A: All the structures present in our body are developed by the germ layers. Germ layers are specialized…

Q: At which stage of embryonic development does the embryo have a blastopore?   Group of answer choices…

A: Embryogenesis is the development embryo which starts with the fertilization of egg cell with a…

Q: What kind of body plan does Daphnia have (sac, or tube-within-a-tube

A: Daphnia is a small planktonic  organisms .

Q: What is the importance of blastopore formation in protostomes? There may be multiple correct…

A: Blastopore formation further helps in gastrulation i.e formation of body cavity or it mainly forms…

Q: The only members of Phylum Mollusca that have a radula are the gastropods (True/False)?

A: The radula is an anatomical structure used by molluscs for feeding. It is analogous to the tongue.…

Q: State the function of the following parts of the genus Romalea (grasshopper):

A: Invertebrates are some of the most available small animals present on the Earth. They share almost…

Q: D. Discuss the development interaction between the actoderm and the mesoderm in the evolution of the…

A: Chordates, including vertebrates, evolved within a group of animals called the deuterostomes.…

Q: How is the nervous system characterized in beings of the phylum Annelida? How can one compare…

A: Annelids are triploblastic, bilaterally symmetrical, metamerically segmented and a coelomate worm…

Q: QUESTIONS: 1. In a developing chicken, what is the opening of the future kidney tubules into the…

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Q: Which earthworms have a clitellum?a). adultsb). juvenilesc). juvenile femalesd). malese). adult…

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