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Human Health - SCHS EOC biology files
... How do the male and female reproductive systems work together to create a zygote? • Meiosis creates gametes in the male and female reproductive systems. – These gametes meet during fertilization and create a zygote. ...
... How do the male and female reproductive systems work together to create a zygote? • Meiosis creates gametes in the male and female reproductive systems. – These gametes meet during fertilization and create a zygote. ...
Animal Presentation
... • Adults live in the bile ducts of humans, dogs, and cats • There are 2 intermediate hosts: a snail and a fish • Eggs are passed out of the definitive host and hatch as ciliated larvae called miracidia • The miracidia penetrates a snail molluscan host and becomes a sporocyst • They undergo asexual r ...
... • Adults live in the bile ducts of humans, dogs, and cats • There are 2 intermediate hosts: a snail and a fish • Eggs are passed out of the definitive host and hatch as ciliated larvae called miracidia • The miracidia penetrates a snail molluscan host and becomes a sporocyst • They undergo asexual r ...
LC Biology Sample Paper 6 HL Solutions
... (ii) Pollen tube: After pollination the tube nucleus produces the pollen tube / This grows down the stigma of the ovary and / is nourished by the ovary as it grows / when the tube reaches the Micropyle / the front of the tube dissolves and the two sperm cells enter the embryo sac / The pollen tube i ...
... (ii) Pollen tube: After pollination the tube nucleus produces the pollen tube / This grows down the stigma of the ovary and / is nourished by the ovary as it grows / when the tube reaches the Micropyle / the front of the tube dissolves and the two sperm cells enter the embryo sac / The pollen tube i ...
Cell Theory and Mitosis Classwork Name
... balance. Perhaps recent extinctions caused by humans could be cloned. 18. Responses will vary but should show all stages (2 divisions of the nucleus). 19. Daphnia may not be able to find a mate in a lake. They can reproduce without one asexually. If they find a mate, the offspring can have variation ...
... balance. Perhaps recent extinctions caused by humans could be cloned. 18. Responses will vary but should show all stages (2 divisions of the nucleus). 19. Daphnia may not be able to find a mate in a lake. They can reproduce without one asexually. If they find a mate, the offspring can have variation ...
Answers
... The body of most fungi is composed of filamentous hyphae that can aggregate to form mats of mycelia (singular, mycelium) below ground or fruiting bodies that often appear above ground. b. Which fungi do not share this basic body plan? The yeasts are unicellular. 2. Fungi may be said to have both pla ...
... The body of most fungi is composed of filamentous hyphae that can aggregate to form mats of mycelia (singular, mycelium) below ground or fruiting bodies that often appear above ground. b. Which fungi do not share this basic body plan? The yeasts are unicellular. 2. Fungi may be said to have both pla ...
Issues of Sexuality In the Elderly
... people believe that older adults do not or should not have sexual activity. In fact, if an older person is physically able and has a partner, sexual activity and satisfaction with sex can persist well into the 90s. Sex, physical intimacy, and emotional intimacy are lifelong needs. Often because of p ...
... people believe that older adults do not or should not have sexual activity. In fact, if an older person is physically able and has a partner, sexual activity and satisfaction with sex can persist well into the 90s. Sex, physical intimacy, and emotional intimacy are lifelong needs. Often because of p ...
Part III
... three ways of reproducing, two are asexual and one is sexual. They can grow sex organs and produce gametes; they can produce little reproductive packets called capsules which fall off and germinate. If all else fails the group can go to pieces: fragmenting, each bit starting anew. In this lab, you w ...
... three ways of reproducing, two are asexual and one is sexual. They can grow sex organs and produce gametes; they can produce little reproductive packets called capsules which fall off and germinate. If all else fails the group can go to pieces: fragmenting, each bit starting anew. In this lab, you w ...
7th Spring Final Exam Review 2016
... 56. Describe how the endocrine system helps your body maintain homeostasis. ...
... 56. Describe how the endocrine system helps your body maintain homeostasis. ...
II - Zoology
... where the individual specimen changes sex after spawning (sex reversa1). For instance, Lates calcarifer are protandrous hermaphrodites, males often change their sex after spawning, though not all females are originally males (Moore, 1979; Davis, 1982). Hermaphroditism probably evolve under condition ...
... where the individual specimen changes sex after spawning (sex reversa1). For instance, Lates calcarifer are protandrous hermaphrodites, males often change their sex after spawning, though not all females are originally males (Moore, 1979; Davis, 1982). Hermaphroditism probably evolve under condition ...
Comparative Vertebrate Anatomy, 2nd hour exam Nov
... cloaca for internal fertilization. In sharks, claspers-projections on the pelvic fins provide a path for sperm to follow for internal fertilization. In reptiles there are hemipeni which serve the same purpose. In mammals and turtles there is a penis – a single projection which sperm can swim on or ...
... cloaca for internal fertilization. In sharks, claspers-projections on the pelvic fins provide a path for sperm to follow for internal fertilization. In reptiles there are hemipeni which serve the same purpose. In mammals and turtles there is a penis – a single projection which sperm can swim on or ...
What You Need to Know About Child Sexual Abuse
... False: 1 in 4 girls and 1 in 6 boys will be victimized by sexual abuse before they are 18 years old It’s much more prevalent and widespread than many realize! ...
... False: 1 in 4 girls and 1 in 6 boys will be victimized by sexual abuse before they are 18 years old It’s much more prevalent and widespread than many realize! ...
Slide 1
... • Must regulate the increase of freshwater into their bodies as natural osmosis and diffusion seek to balance salt concentrations within and surrounding their bodies ...
... • Must regulate the increase of freshwater into their bodies as natural osmosis and diffusion seek to balance salt concentrations within and surrounding their bodies ...
Biology EOC Study Guide - Auburndale High School
... - Unicellular – organism that exists as a singular, independent cell - Multicellular – organism that exists as specialized groups of cells; cells are organized into tissues that perform the same function; tissues form organs and organs make up an organ system - Prokaryote – has nuclear material in t ...
... - Unicellular – organism that exists as a singular, independent cell - Multicellular – organism that exists as specialized groups of cells; cells are organized into tissues that perform the same function; tissues form organs and organs make up an organ system - Prokaryote – has nuclear material in t ...
Gaston County Review
... - Unicellular – organism that exists as a singular, independent cell - Multicellular – organism that exists as specialized groups of cells; cells are organized into tissues that perform the same function; tissues form organs and organs make up an organ system - Prokaryote – has nuclear material in t ...
... - Unicellular – organism that exists as a singular, independent cell - Multicellular – organism that exists as specialized groups of cells; cells are organized into tissues that perform the same function; tissues form organs and organs make up an organ system - Prokaryote – has nuclear material in t ...
Biology EOC review - Duplin County Schools
... - Unicellular – organism that exists as a singular, independent cell - Multicellular – organism that exists as specialized groups of cells; cells are organized into tissues that perform the same function; tissues form organs and organs make up an organ system - Prokaryote – has nuclear material in t ...
... - Unicellular – organism that exists as a singular, independent cell - Multicellular – organism that exists as specialized groups of cells; cells are organized into tissues that perform the same function; tissues form organs and organs make up an organ system - Prokaryote – has nuclear material in t ...
The Crayfish
... Phylum- Arthropoda Subphylum- Crustacea More than 1.1 million species of arthropods. They have achieved the greatest diversity, although few can live in salt water. Zooplankton- is formed by most marine arthropods during their larval stages. All land and marine arthropods have a external skeleton, s ...
... Phylum- Arthropoda Subphylum- Crustacea More than 1.1 million species of arthropods. They have achieved the greatest diversity, although few can live in salt water. Zooplankton- is formed by most marine arthropods during their larval stages. All land and marine arthropods have a external skeleton, s ...
Common Characteristics
... Eggs are fertilized OUTSIDE the mother’s body. Adults release eggs and sperm into the surrounding water and sperm swim to the eggs to fertilized them. To increase chances, huge numbers of eggs and sperm are released. ...
... Eggs are fertilized OUTSIDE the mother’s body. Adults release eggs and sperm into the surrounding water and sperm swim to the eggs to fertilized them. To increase chances, huge numbers of eggs and sperm are released. ...
June 2008
... Instructions: Complete all items in this section. Your responses should be clearly presented in a well-organized manner. ...
... Instructions: Complete all items in this section. Your responses should be clearly presented in a well-organized manner. ...
Biology 20 Laboratory Quiz Quiz # Animal Reproduction – Take
... B) spermatogenesis begins before birth. C) spermatogenesis is not complete until fertilization occurs. D) oogenesis produces four haploid cells, whereas spermatogenesis produces only one functional spermatozoon. E) oogenesis begins at the onset of sexual maturity. 7) Fertilization of human eggs usua ...
... B) spermatogenesis begins before birth. C) spermatogenesis is not complete until fertilization occurs. D) oogenesis produces four haploid cells, whereas spermatogenesis produces only one functional spermatozoon. E) oogenesis begins at the onset of sexual maturity. 7) Fertilization of human eggs usua ...
Cells - Tuckahoe Common School District
... something that comes from outside the organism or from within the organism that triggers a reaction. Examples: cold breeze stomach growl ...
... something that comes from outside the organism or from within the organism that triggers a reaction. Examples: cold breeze stomach growl ...
File - Biology and Other Sciences for KICS
... 3 kinds of development Oviparous – eggs are laid which hatch outside the ...
... 3 kinds of development Oviparous – eggs are laid which hatch outside the ...
document
... and cloaca are used to eliminate waste. • Reproduction: Fertilization is internal and first animals to use an amniotic egg for offspring, may have oviparous birth (eggs deposited into an external nest) or viviparous (reptile retains egg and gives birth to live offspring) ...
... and cloaca are used to eliminate waste. • Reproduction: Fertilization is internal and first animals to use an amniotic egg for offspring, may have oviparous birth (eggs deposited into an external nest) or viviparous (reptile retains egg and gives birth to live offspring) ...
Chordates powerpoint 2012
... • At some stage of development, all vertebrates share the four features: 1. Notochord-long supportive rod that runs through the body, most only have it while embryos 2. Dorsal hollow nerve cord-nerves branch from this cord and connects to internal organs, muscles and sense organs 3. Pharyngeal gill ...
... • At some stage of development, all vertebrates share the four features: 1. Notochord-long supportive rod that runs through the body, most only have it while embryos 2. Dorsal hollow nerve cord-nerves branch from this cord and connects to internal organs, muscles and sense organs 3. Pharyngeal gill ...
Sexual reproduction
Sexual reproduction is a form of reproduction where two morphologically distinct types of specialized reproductive cells called gametes fuse together, involving a female's large ovum (or egg) and a male's smaller sperm. Each gamete contains half the number of chromosomes of normal cells. They are created by a specialized type of cell division, which only occurs in eukaryotic cells, known as meiosis. The two gametes fuse during fertilization to produce DNA replication and the creation of a single-celled zygote which includes genetic material from both gametes. In a process called genetic recombination, genetic material (DNA) joins up so that homologous chromosome sequences are aligned with each other, and this is followed by exchange of genetic information. Two rounds of cell division then produce four daughter cells with half the number of chromosomes from each original parent cell, and the same number of chromosomes as both parents, though self-fertilization can occur. For instance, in human reproduction each human cell contains 46 chromosomes, 23 pairs, except gamete cells, which only contain 23 chromosomes, so the child will have 23 chromosomes from each parent genetically recombined into 23 pairs. Cell division initiates the development of a new individual organism in multicellular organisms, including animals and plants, for the vast majority of whom this is the primary method of reproduction. A species is defined as a taxonomic rank. A species is often defined as the largest group of organisms where two hybrids are capable of reproducing fertile offspring, typically using sexual reproduction, although the species problem encompasses a series of difficult related questions that often come up when biologists define the word species. The evolution of sexual reproduction is a major puzzle because asexual reproduction should be able to outcompete it as every young organism created can bear its own young. This implies that an asexual population has an intrinsic capacity to grow more rapidly with each generation. This 50% cost is a fitness disadvantage of sexual reproduction. The two-fold cost of sex includes this cost and the fact that any organism can only pass on 50% of its own genes to its offspring. One definite advantage of sexual reproduction is that it prevents the accumulation of genetic mutations.Sexual selection is a mode of natural selection in which some individuals out-reproduce others of a population because they are better at securing mates for sexual reproduction. It has been described as ""a powerful evolutionary force that does not exist in asexual populations""Prokaryotes reproduce through asexual reproduction but may display processes similar to sexual reproduction (mechanisms for lateral gene transfer such as bacterial conjugation, transformation and transduction), but they do not lead to reproduction. In prokaryotes, the initial cell has additional or transformed genetic material.