1. What is the sex of a pigeon and the crest of a pigeon a product of?

Q: A zygote is formed from the fusion of what two cells ?

A: two haploid sex cells

Q: Provide three differences of the endodermal parts of the 72-hour chick embryo with the 10 mm pig…

A: A 10 mm pig embryo is more complex than the 72 hour chick embryo. In 10 mm pig embryo, it developed…

Q: 5. In honey bees, males are developed parthenogeretically while workers are developed after sexual…

A: Step 1 Parthenogenesis is the development of an embryo or new individual from a single gamete…

Q: What do you think is the reason why there is a diverse way of reproduction both in plants and…

A: Fertilization is a process in which male gametes fuse with the female gamete to produce zygote which…

Q: 5. Describe the 3 sexual causes of genetic variability and identify the stages of human development…

A: Genetic variability is defined as the formation of new species and which forms the basis of…

Q: 4. Into what cavity does the blastopore open? The gastrular slit? What becomes of each? 5. Explain…

A: Introduction :  The initial gut that develops during the gastrula stage is called the archenteron.…

Q: Where does fertilization occur? 2. What is Pap’s smear? Give its significance?

A: Reproductive system:- Is the system that produces gametes and sex hormones in both males and…

Q: #19 What is fertilization? 1.when the pollen lands on the stigma of a flower 2.when meiosis…

A: According to the question, we have to find out what is fertilization among the given options. So,…

Q: 8. How many Barr bodies would a Klinefelter male have? O A) 1 O B) 2 O C) 3 O D) None

A: Klinefelter syndrome is an inherited disorder that affects only men. The boy is born with one or…

Q: 1. What are the phases of group development and give example of each?

A: We know that Group Development means to form the association of individuals to work as a group and…

Q: Explain the significance and describe the features of fertilization and cleavage in early animal…

A: Animal embryonic development is also called as embryogenesis. After the fertilization of the zygote,…

Q: List the stages of embryonic development and what happens at each stage

A: Human fertilization occurs when the haploid sperm cells fertilize the haploid gamete. Embryonic…

Q: In species with environmental sex determination, a. sex is determined during development as an…

A: A sex-determination framework is a natural framework that decides the improvement of sexual…

Q: What happenes if fertilization doesnot takes place in utreus?

A: Humans, as mammals, have the capability to reproduce sexually. Sexual reproduction requires the…

Q: When considering pubertal maturation in domestic and marsupial species, describe the underlying…

A: Puberty is an important process in the development of all human beings — a series of hormonal…

Q: Compare and contrast animals with external fertilization to those with internal fertilization. What…

A: Fertilization is a phenomenon in which male gamete known as sperm fuses of female gamete that is ova…

Q: How do the starfish reproduce?

A: Starfish can replicate asexually and sexually. In sexual reproduction, reproduction happens in the…

Q: how does the  asexually produced individuals move across the landscape?

A: The process by which a new individual is generated from the parents is known as reproduction. Sexual…

Q: What are the features used to identify a male cockroach from a female cockroach?

A: Cockroaches are insects which also includes termites. They belong to kingdom-Animalia. About 30…

Q: Name the two indicated structures below the arrow, seen here in the Pinus ovule.

A: Pinus is a tree that belongs to a group of plants known as gymnosperms. This plant is mainly…

Q: 2. How does Meiosis work?

A: The fundamental and active biological process by which a parent cell, after replicating of its…

Q: 1. Match the early embryo characteristics with the correct stage of development. Not all choices…

A: Embryology is a branch of science which deals with the study of embryo development. Embryology helps…

Q: 30. A. Embryogenesis follows while the ovary matures into fruit. B. The ovule becomes the seed.

A: Embryogenesis is a process that occurs in plants after fertilization. Fertilization is the process…

Q: 1. What did calcium ions do during fertilization in sea urchins?

A: Sea urchins are free-living echinoderms that have venomous, sharp, brittle spines covering them as…

Q: Compare the male and female flies. Give a good photo of each, and describe 3 phenotypic differences.

A: It is quite easy to tell the difference between the two sexes. There are several characteristics…

Q: woman with severe discoloration of her tooth enamel has four children with a man who has normal…

A: The genes can exist in two versions called "allles", either as dominant where they are expressible…

Q: What are the different mechanisms the egg employed to ensure that only one sperm cell will fertilize…

A: Polyspermy refers to fertilization of an egg cell by numerous sperms. It is avoided during…

Q: A male of one species is bred multiple times to a female of a different species. No offspring are…

A: Cross-species breeding incompatibility is the inability of individuals from two different species to…

Q: Why is it more difficult to determine the sex of a newlyhatched canary than a newborn puppy?

A: A sex-determination mechanism is a physiological system that controls how an organism's sexual…

Q: 3. Which is TRUE about asexual reproduction? A presence of zygote B. does not involve gametes C.…

A: According to guidelines we have to answer the first question only. so please kindly post the…

Q: 5. Which of the following determines the sex of the offspring ? 1. The egg 2. Temperature 3. The…

A: Sex of an individual is either male or female. Male has XY genotype and female has XX genotype.

Q: How are sperm and egg cells produced?

A: The male and female gametes that are haploid by blood and fertilize to form a diploid zygote are…

Q: 4. As the embryo develops, what do the amnion and the yolk sac become, respectively? a. A sac that…

A: The amnion is filled with the amniotic fluid due to which the amnion expand and provides protection…

Q: 2. Name the two ways fertilization can occur. a. Give an example animal that practices each. b.…

A: WHAT IS FERTILIZATION ? Fertilization is a process of combining of male gamete or sperm with female…

Q: Describe the development of the amniotic cavity, the bilaminar embryonic disc, the yolk sacs…

A: There are many different stages in the development of the fetus. After fertilization, the zygote is…

Q: 7: Gorillas exhibit sexual dimorphism, which means ... Group of answer choices A: the males are less…

A: The term sexual dimorphism is used to explain the morphological differences (structure, body-color,…

Q: What are the three ways sex is determined in reptiles? Briefly describe each.

A:

Q: Distinguish between primary and secondary, sex characteristics.

A: In an organism, sexual characteristics, conduct features related to sex. Primary sex characteristics…

Q: 9. Some biologists contend that the term double fertilization is a misnomer and that the process…

A: Fertlizatiion is the process of the male gamete, sperm, fusing with the female gamete, the ovum,…

Q: What determines sex in birds, reptiles, humans, ants, and bees?

A: In most of the animals, sex is determined by sex chromosomes.

Q: Meiosis is necessary because: a. Fertilized ovum will have too much genetic material b. Fertilized…

A: Meiosis is necessary because Fertilized ovum will have too much genetic material.

Q: 16. In amphibian embryos, BMPS act on ectodermal cells in concert with Wnts to form the epidermis.…

A: Developmental biology describes how interacting mechanisms generate an organism's various size,…

Q: 4. Briefly explain how the mutation in one gene can trigger a cascade of genetic impacts in the…

A: The alteration in the sequence of DNA either due to a mistake during the copying of DNA or because…