During the evolution of animals , bilateral summetry accompanied cephalization . suggest a reason for this

Q: Why was the evolution of a coelom important?

A: Coelom is a fluid filled body cavity which is present between Alimentary Canal and Body Wall.

Q: Why is embryogenesis important in reptile specially in snakes?

A: Importance of embryogenesis in reptiles especially in snakes.

Q: make a concept map, to discuss how reproduction takes place in animals. (Include the modes, sexual…

A: Reproduction is the process through which which offspring are produced from their parents. Each…

Q: Using a table compare the patterns of development across the different vertebrate groups (fishes,…

A: Embryo development in different animals may differ. It also gives an indication evolutionary…

Q: The process forming the neural tube and plate via the intercalation of cells along the…

A: The fusion and fertilization of parental sex gametes give rise to a zygote. A zygote is the first…

Q: describe the evolutionary advantage that the cleidoic egg provided to terrestrial organisms.

A: The Cleidoic egg is a form of egg inhabited with the useful resource of reptiles and birds. Replica…

Q: Humans have a coccyx at the end of the vertebral column. What structure common to all vertebrate…

A: The coccyx is a triangular structure of bones near the bottom of the backbone, just below the…

Q: Which statement is true of Spemann’s organizer?a. It is unique to amphibian embryos.b. It arises…

A: Answer is a.)  it is unique to amphibian embryos.

Q: Comparison Explain the comparison between the reproductive systems of the pig and frog. How does…

A: Pig It belongs to the genus Sus. Frog Its scientific name is Anura.

Q: How is colostrum most important to a newborn?a. It helps boost the newborn’s immune system.b. It…

A: Immune system is a complex organization of cells, tissues, and organs. The immune system important…

Q: How many functional eggs (ova) result from one oogonium?     A. 1 and 3 polar bodies   B. 18…

A: In sexually reproducing organisms haploid gametes are produced. Female gametes are called eggs…

Q: Which of these characteristics best promoted the survival of offspring in reptiles, birds, and…

A: Reptiles are vertebrates that are covered in special skin made up of scales or bony plates. They are…

Q: Compare the male and female reproductive organs of reptiles and birds. Explain how are their…

A: Introduction Reptiles are cold-blooded animals that have vertebral columns at their backs. These…

Q: Where does fertilization of the egg by the spermtypically occur?a. vaginab. uterusc. uterine tubed.…

A: Sexual reproduction is a type of reproduction that involves a complex life cycle in which a gamete…

Q: Generate a hypothesis that may explain how contact by a sperm to the outside of the cell membrane of…

A: Calcium is stored in large amounts in endoplasmic reticulum and is released at the time of sperm egg…

Q: Of all birds, the flightless kiwi has the highest proportion of yolk in its eggs and the longest…

A: Eggs are the products of fertilization and house the developing embryo .

Q: Does sand temperature determines the sex of sea turtles? Discuss.

A: In some organisms the sex is determined before fertilization and in some organisms such as reptiles…

Q: In mammals, distinguish and differentiate the following germinal layers. Identify the organs that…

A: Introduction :- Mesoderm interacts with endoderm and ectoderm during organogenesis to give rise to…

Q: Larval development is common among marine crustaceans but very rare among freshwater ones. Can you…

A: The first step in hypothesizing why larval development is common among marine crustaceans but rare…

Q: determine the way in which the sperm production of male bees differs from the sperm production of…

A: Meiosis, spermiogenesis, and spermatocytogenesis are the three components of spermatogenesis. In…

Q: Explain the evolutionary advantage of the amniotic egg

A: Amnion is a membrane which enclose the embryo after it's formed.Embryo is the initial stage of…

Q: When genetic males lacked the enzyme that converts testosterone to dihydrotestosterone, what…

A: The correct option is B. They looked female at birth but developed male structures at puberty .

Q: Suppose we would want to have mirrored lateral sides (meaning both the left and right portion are…

A: During the development of a chick embryo, Blastodisc growth occurs only in a small area of the egg.…

Q: Explain how larger Horns in the males of dung beetles could have evolved?

A: The dung bettles are the type of beetles that feed on the dung and the faeces.  The male has a horn…

Q: What was important about the development of the egg as a part of the reproductive cycle of animals?…

A: Yolk formation in humans

Q: between  which  two consecuative stages did fertilization occur

A: Fertilization is a cell-to-cell interaction mechanism that takes place among two unique cells: a…

Q: This structure is the site of fertilization? a.E b.C c.A dD e.B

A: The reproductive system in humans is one of the 11 vital body organ systems that is concerned with…

Q: In animal gamely he did, a single primary spermatocyte generates blank sperm, while single primary…

A: The meiosis is the cell division process by which a diploid (2n) mother cell divides its nucleus…

Q: Are the similar structures among vertebrate species during embryogenesis homologous structures?…

A: The existence of similar structures in different species is one of the most important pieces of…

Q: Explain mesoderm where it is present in animal kingdom?

A: In an embryo, germ layer is a group of cells that interact with each other during the development of…

Q: Differentiate Protostomes from Deuterostomes in terms of the formation of cleavage

A:

Q: Researchers searched for an activator of neural tissue formation. What is the real pathway for this…

A: In this question, from the given choices, we have to select the correct option for neural tissue…

Q: Give two ways nature uses to hide differences between X- and Y-sperm in mammals?

A: Most cells of the mammals contain both an X and a Y chromosome, but in the process of…

Q: Assess the function of the uterine horns of the pig.

A: Anatomy can be defined as a branch of biology that is associated with the study of the organism’s…

Q: redict what would happen if Ca2+ was injected into an unfertilized sea urchin egg.

A: Sea urchins are tiny, round echinoderms usually found in the depth of the ocean. The body has radial…

Q: mine which end is its head and which is its tail?

A: Mammalian embryogenesis can be defined as the process of cell division that involves cellular…

Q: Using a concept map, discuss how reproduction takes place in animals. (Include the modes, sexual and…

A: The biological process by which new individual organisms – "offspring" – are formed from their…

Animal Diversity

Nematodes are commonly known as roundworms. They are free-living, very tiny organisms. They have an elongated and tubular body. These organisms have a nervous system and are mostly act as parasites to both animals and plants.

Platyhelminthes

Platyhelminthes are also known as "flatworms" because as they are dorsoventrally flattened from head to tail. They are invertebrate, soft-bodied, acoelomate, unsegmented and have bilateral symmetry.