Hermaphroditic animals can self-fertilize, except earthworms. Why? And is this an advantageous or disadvantageous trait to the earthworms?

Q: Female bees are diploid, and male bees are haploid. The haploid males produce sperm and can…

A: Ploidy refers to the number of chromosomes present in the nucleus of a cell. In normal somatic…

Q: Living organisms that are capable of producing both egg and sperm have both male and female…

A: Egg and sperm are two kinds of reproductive cells, sometimes known as gametes. Each carries half of…

Q: ow may positive feedback happen during parturition cycle (NOT uterine contraction cycle)? a) 0,…

A: Parturition: This term is used to define the process of giving birth to offspring or we can also say…

Q: Create a conclusion about spermatogenesis by using the objectives below.       To identify the…

A: Spermatogenesis is a long and precise cycle through which spermatozoa are delivered inside…

Q: What are the organizing effects of sex hormones? Compare the negative feedback loops in the male…

A: Steroid hormones that interact with steroid hormone receptors in vertebrates are known as sex…

Q: Give the differences between mammalian and frog oogenesis. OOGENESIS MAMMAL FROG 1.     2.     3.…

A: The difference between the mammalian and amphibian (frog) oogenesis are as follows:

Q: Discuss the following terms in detail: 1.1  Fertilisation  1.2  Cleavage   1.3  Gastrulation 1.4…

A: Gametes are defined as the reproductive haploid cells of the organism where they consists of 23…

Q: astrulation, are there any evidences of cephalization? Why or why not?

A: Gastrulation: During gastrulation, cell motions cause the embryo to reorganise massively,…

Q: The presence or absence of testosterone determines whether a mammal will differentiate as a male or…

A: In, mammals, estrogen is a hormone which is required to sustain the pregnancy, in coordination with…

Q: Which statement about menopause is  most correct? A. Menopause has to be adaptive because…

A: C. Several hypotheses for menopause as an adaptation have been proposed, but more evidence is…

Q: what are three difference between mammals and frog testis?

A: The architecture of human urogenital tracts differs dramatically from that of all other animals. The…

Q: The contraceptive 'SAHELI' is?

A: Contraception is the deliberate use of artificial methods or other techniques to prevent pregnancy…

Q: Is this true or false? a. Fertilization is followed by a cleavage, a period of rapid cell…

A: The science of how plants and animals develop and grow is known as developmental biology.…

Q: Contrast the biological advantages of hermaphroditism that involves cross-fertilization with…

A: Hermaphroditism is referred to as intersex which is a condition in which there is a discrepancy…

Q: What will be the advantage and disadvantage of producing through asexual and asexual method?

A: BASIC INFORMATION ANIMAL KINGDOM  It is among one of the five kingdom classified by R.H. Whittaker.…

Q: Match the germ layer with the correct derivative Gastrodermis v [ Choose ] Ectoderm Endoderm…

A: There are 3 germ layers ectoderm, mesoderm and endoderm giving rise to different organs in…

Q: Compared to separate sexes and assuming self-fertilizing is not possible, what might be one…

A: Hermaphrodite  The organism that possess both sex organ male and female together inside the body are…

Q: 1. Zygote 2. Morula 3. Oocyte 4. Fertilization 5. Clevage 6. Blastocyte The order in which…

A: The stages are as follows : Oocyte Fertilization zygote  cleavage Morula Blastocye

Q: Why are sea urchins have external fertilization? What are the adaptive advantages of external…

A: Sea urchins are significant herbivores on coral reefs, & in certain environments they assume a…

Q: A female egg cell has two outer membranes how does the egg cell prevent polyspermy? if polyspermy…

A: Sexual reproduction refers to the form of reproduction that occurs through the union of male and…

Q: As discussed in the introduction to this chapter, sex in bearded dragons is determined by both sex…

A: The sex determination system regulates the development of sexual characters in any organism.…

Q: Which of the following scenarios does NOT describe an event that leads to the conceptions of twins?…

A: While twin pregnancies can occur by some coincidence, there are a few factors that may expand your…

Q: How do the two kinds of mammalian reproductive cycles— estrous and menstrual differ?

A: Fertility is more tightly regulated in the female then males. Female placental mammals have one or…

Q: Which of the following statements does NOT describe the role of progesterone in the female…

A: Fertilization, pregnancy and other reproduction related processes are controlled by acts of some…

Q: 1. How long is one menstrual cycle? 2. On which day of the menstrual cycle does the period start?…

A: Hello. Since your question has multiple parts, we will solve the first question for you. If you want…

Q: Which of the following occurs to the blastocoel during Xenopus development?     is replaced by the…

A: Xenopus It refers to the genus of highly aquatic frogs that are mostly found in the regions of…

Q: Why are pregnant women cautioned against cleaning litter boxes?

A: Litter box A litter box, or cat box, is used for collection of urine and feces of cats as well as…

Q: differentiate the frog and mammalian spermatogenesis. Spermatogenesis Frog Mammal

A: Spermatogenesis is the development of haploid sperm cells from germ cells in the testis'…

Q: The endometrium thickens during the uterine cycle, but disintegrates if the egg is not fertilized.…

A: Menstrual cycle is the cycle of changes in hormone levels and endometrial lining of female…

Q: why an increased level of FSH raises the likelihood of fraternal twins.

A: Sperm and egg (ova) are male and female gametes respectively. Fertilization is the process of fusion…

Q: Direction: Explain the following in paragraph form consists of at least five sentences for each…

A: Introduction Sex determination is the process, by which the sex of the organism is initially…

Q: How do the two kinds of mammalian reproductive cycles—estrous and menstrual—differ from each other?

A: The reproductive cycles refers to the change in the physiological changes in the reproductive organs…

Q: Which of the following is not true about neurulation? Choose all possible answers. a. Segregation…

A: The brain is a complex organ that controls the thought, memory, emotion, touch, motor skills,…

Q: You find two closely related species of fly, one (P) of which appears to reproduce…

A: Closely related species are the group of species that they have very few boundaries.  The…

Q: Fishes and some species of amphibians like frogs fertilize their eggs outside of their body. Which…

A: External fertilization  Syngamy of gametes outside the female body/outer environment, notably in…

Q: Could the number of eggs or young ones produced by an oviparous and viviparous mother be equal? Why?

A: Fertilization is a phenomenon in which male as well as female sex cells combine with each other…

Q: Why are most babies born in the spring?

A: The Center for Disease Control and Prevention (cdc) presents birth rate by month data, noting July…

Q: Which factors are responsible for successful reproduction in male? Do you think the reproductive…

A: Male reproductive system consists of testis, epididymis, ductus deferens, ejaculatory duct and…

Q: If there are 7 spermatogonium that will undergo cell division, how many primary spermatozoa will be…

A: Spermatogenesis is the process of producing sperms from spermatogonium in the seminiferous tubules…

Q: This experiment is an example of a research approach in which scientists infer how something works…

A: Male and female gonads are the main reproductive organs. The testes are the male gonads, and the…

Q: How many somites are there in mouse? In chicks? In humans

A: In embryology, a somite is among a series of longitudinal blocklike sections into which the…

Q: If a woman is DdHH, how many different types of eggs can she produce?

A: Homozygous is the genotype of an organism with two identical alleles at a locus. Heterozygous refers…

Q: in mammals, the luteinizing hormone has what impact on gamete development? select all that apply.…

A: Luteinizing hormone is produced form the Anterior pituitary gland.It is produced from the…

Q: Could the number of egg or young ones produced by an oviparous and viviparous mother be equal why?

A: Oviparous animals produce eggs and that can be fertilized or unfertilized. The viviparous animals…

Q: Why do sea urchins have external fertilization?

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: In comparing external and internal fertilization, what evolutionary change can be seen in the coats…

A: In sexual reproduction, the process of fusion of two gametes to form a zygote is known as…

Q: What organ does the somatic hypomere originating from the general mesoderm give rise to?    a.…

A: Somatic hypomere is found to give rise to skeleton of the body, limbs and bony girdles. The mesoderm…

Q: Which of the following organisms practice internal fertilization and external development. Chickens,…

A: Introduction :- Internal fertilisation is the joining of an egg and sperm cell inside the female…

Q: Explain the following in paragraph form consists of at least five sentences for each question.…

A: Hermaphroditism is the process in which both the  types of reproductive organs are present in the…

Tissue renewal

In multicellular organisms, tissue is a level of structure that consists of a group of physically and functionally identical cells and their intercellular substances. Unicellular organisms do not have tissues. Tissues are absent or poorly differentiated even in the simplest multicellular animals, such as sponges. However, more evolved multicellular animals and plants have specialized tissues that may organize and govern an organism's reaction to its surroundings. The word tissue is derived from the Latin word 'weave.' Plants and animals have various kinds of tissue systems that differ in their work and composition according to the different requirements.