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essential vocabulary for biology staar
... Any species from which two or more organisms evolved – it is an ancestor of both species. The places where different populations have lived on earth throughout geologic history – evidence of evolution. Evidence for evolution coming from samples of fossils of various times that show homologies. A sim ...
... Any species from which two or more organisms evolved – it is an ancestor of both species. The places where different populations have lived on earth throughout geologic history – evidence of evolution. Evidence for evolution coming from samples of fossils of various times that show homologies. A sim ...
Chapter 8 Evolution at multiple loci: linkage and
... Asexually reproducing females under Maynard Smith’s assumptions leave twice as many grandchildren as sexually reproducing females. This is because each generation of sexually reproducing organisms contains only 50% females. ...
... Asexually reproducing females under Maynard Smith’s assumptions leave twice as many grandchildren as sexually reproducing females. This is because each generation of sexually reproducing organisms contains only 50% females. ...
6.ICR.3.2 - Summarize the relationship between conception and the
... • A female’s first menstruation is called menarche. • She will have had earlier pubertal developments such as pubic hair and the beginning of breast development. • Menarche usually occurs between the ages of 11 - 15. ...
... • A female’s first menstruation is called menarche. • She will have had earlier pubertal developments such as pubic hair and the beginning of breast development. • Menarche usually occurs between the ages of 11 - 15. ...
9A Inheritance and Selection
... baby competition. He can’t decide whether to make it the Cutest or Ugliest. So he’s holding both • You may like to have regional heats within your groups • Each group can enter one baby into each competition – Make sure that your babies get entered for the right category! You never know your cute on ...
... baby competition. He can’t decide whether to make it the Cutest or Ugliest. So he’s holding both • You may like to have regional heats within your groups • Each group can enter one baby into each competition – Make sure that your babies get entered for the right category! You never know your cute on ...
bacterial vaginosis - London Women`s Care
... What is bacterial vaginosis? Bacterial vaginosis is a common inflammation of the vagina. In the past bacterial vaginosis has been called nonspecific vaginitis or Gardnerella vaginitis. How does it occur? Bacterial vaginosis appears to be caused by an overgrowth of several types of bacteria. It is no ...
... What is bacterial vaginosis? Bacterial vaginosis is a common inflammation of the vagina. In the past bacterial vaginosis has been called nonspecific vaginitis or Gardnerella vaginitis. How does it occur? Bacterial vaginosis appears to be caused by an overgrowth of several types of bacteria. It is no ...
REPRODUCTION - Teaching Biology Project
... rays also have internal fertilisation. Mating and copulation occurs. Most animals have cloaca – common opening for reproduction and egestion – during fertilisation cloacas are lined up. Male insects and mammals have a penis – organ to transfer sperm to body of female. Fluid inside female provide med ...
... rays also have internal fertilisation. Mating and copulation occurs. Most animals have cloaca – common opening for reproduction and egestion – during fertilisation cloacas are lined up. Male insects and mammals have a penis – organ to transfer sperm to body of female. Fluid inside female provide med ...
reproduction - Teaching Biology Project
... rays also have internal fertilisation. Mating and copulation occurs. Most animals have cloaca – common opening for reproduction and egestion – during fertilisation cloacas are lined up. Male insects and mammals have a penis – organ to transfer sperm to body of female. Fluid inside female provide med ...
... rays also have internal fertilisation. Mating and copulation occurs. Most animals have cloaca – common opening for reproduction and egestion – during fertilisation cloacas are lined up. Male insects and mammals have a penis – organ to transfer sperm to body of female. Fluid inside female provide med ...
Document
... as many grandchildren as sexually reproducing females. This is because each generation of sexually reproducing organisms contains only 50% females. ...
... as many grandchildren as sexually reproducing females. This is because each generation of sexually reproducing organisms contains only 50% females. ...
Chapter 12
... Protists: eukaryotes that are not fungi, plants, animals Chapter 12 includes multicellular worms, certain insects since implicated in human disease • Often transmitted or carried in microscopic forms ...
... Protists: eukaryotes that are not fungi, plants, animals Chapter 12 includes multicellular worms, certain insects since implicated in human disease • Often transmitted or carried in microscopic forms ...
lecture_16_Feb_19_Trematode-1
... more intermediate hosts, the first of which is always a mollusc. Typically the larval stages parasitize one or more species that are different from the definitive host of adults. Larval stages include miracidium, redia, cercaria, and metacercaria. As adults they are found in most vertebrates groups, ...
... more intermediate hosts, the first of which is always a mollusc. Typically the larval stages parasitize one or more species that are different from the definitive host of adults. Larval stages include miracidium, redia, cercaria, and metacercaria. As adults they are found in most vertebrates groups, ...
"Ideal" Exam Responses File
... Enzymes regulate the rate of chemical reactions by helping facilitate the two reactants combine with less energy input due to proper orientation and microenviroments which makes reactions more likely to occur. Some enzymatically controlled processes are regulated by feedback inhibition, which means ...
... Enzymes regulate the rate of chemical reactions by helping facilitate the two reactants combine with less energy input due to proper orientation and microenviroments which makes reactions more likely to occur. Some enzymatically controlled processes are regulated by feedback inhibition, which means ...
LAB 1: Scientific Method/Tools of Scientific Inquiry
... provided on your worksheet. If present, you will observe the sporangia on the fern mentioned above. ...
... provided on your worksheet. If present, you will observe the sporangia on the fern mentioned above. ...
Invertebrate Phyla Notes
... capture food. Cephalopods can use _____jet propulsion__________ to move away from predators very quickly. An octopus is able to change its body size, shape, and color to blend into its surroundings. Many cephalopods also have ink to cloud up the water and let them escape. All cephalopods live in ___ ...
... capture food. Cephalopods can use _____jet propulsion__________ to move away from predators very quickly. An octopus is able to change its body size, shape, and color to blend into its surroundings. Many cephalopods also have ink to cloud up the water and let them escape. All cephalopods live in ___ ...
Biology 2201
... ii. Ex: Organelles – small structures inside a cell that undergo functions. iii. Organ systems – groups of organs working together for a common function. Living matter must maintain some type of homeostasis. i. Homeostasis – The process of maintaining a stable internal environment. Homeostasis is ac ...
... ii. Ex: Organelles – small structures inside a cell that undergo functions. iii. Organ systems – groups of organs working together for a common function. Living matter must maintain some type of homeostasis. i. Homeostasis – The process of maintaining a stable internal environment. Homeostasis is ac ...
Arthropoda
... • Terrestrial: usually sexual • Marine: Females usually lay eggs that are fertilized by the male. • Parthenogenesis in some species. – Asexual – Growth and development of embryos occurs without fertilization. ...
... • Terrestrial: usually sexual • Marine: Females usually lay eggs that are fertilized by the male. • Parthenogenesis in some species. – Asexual – Growth and development of embryos occurs without fertilization. ...
Variation - Plantsbrook Science
... new alleles of genes. A gene codes for a particular protein so if the sequence of bases in a gene changes, a non-functional or different protein could be produced. All enzymes are proteins, if there’s a mutation in a gene that codes for an enzyme, then that enzyme may not fold up properly, producing ...
... new alleles of genes. A gene codes for a particular protein so if the sequence of bases in a gene changes, a non-functional or different protein could be produced. All enzymes are proteins, if there’s a mutation in a gene that codes for an enzyme, then that enzyme may not fold up properly, producing ...
Sexually Transmitted Diseases in the Elderly
... Human beings are sexual beings throughout their lives. In good health, a person may continue to be sexually active into the seventh, eighth, and even ninth decade.2 Some degree of sexual appetite is usually present throughout life.3 Although studies on sexuality in older adults are limited, one nati ...
... Human beings are sexual beings throughout their lives. In good health, a person may continue to be sexually active into the seventh, eighth, and even ninth decade.2 Some degree of sexual appetite is usually present throughout life.3 Although studies on sexuality in older adults are limited, one nati ...
Sexuality and Relationships Training Group
... Young men are particularly likely to be deprived of sexual and reproductive information. In general men with intellectual disability are cared for by women either their mothers or female staff – this makes it harder for them to receive accurate information from another man. ...
... Young men are particularly likely to be deprived of sexual and reproductive information. In general men with intellectual disability are cared for by women either their mothers or female staff – this makes it harder for them to receive accurate information from another man. ...
Both Costs and Benefits of Sex Correlate with Relative
... All four populations experienced a significant change in expressed genetic variance after sex for at least some of the life-history traits measured (Fig. 1). In three of the four populations, sexual reproduction led to an overall increase in expressed genetic variance in the offspring generation rel ...
... All four populations experienced a significant change in expressed genetic variance after sex for at least some of the life-history traits measured (Fig. 1). In three of the four populations, sexual reproduction led to an overall increase in expressed genetic variance in the offspring generation rel ...
Characteristics of Life- Borton
... homeostasis: Ability to keep a stable internal environment; ability of the body to maintain a stable internal environment despite a changing environment. generations: the time it takes for an organism to become a mature adult and produce offspring (on average 30 years for human beings) nucleus: Memb ...
... homeostasis: Ability to keep a stable internal environment; ability of the body to maintain a stable internal environment despite a changing environment. generations: the time it takes for an organism to become a mature adult and produce offspring (on average 30 years for human beings) nucleus: Memb ...
Biology Released Form - North Carolina Public Schools
... The yucca plant releases a strong scent at night when the yucca moth is active. The yucca moth, attracted by the scent, gathers pollen from the yucca flower. The yucca moth then deposits her eggs and the pollen on another plant. This ensures that the plant will be cross-pollinated and that the yucca ...
... The yucca plant releases a strong scent at night when the yucca moth is active. The yucca moth, attracted by the scent, gathers pollen from the yucca flower. The yucca moth then deposits her eggs and the pollen on another plant. This ensures that the plant will be cross-pollinated and that the yucca ...
The False Problem of the Maintenance of Sex
... couples in breeding periods (e.g. [24]). In the case of populations in balance, the average number of offspring per female in an asexual population is one individual, whereas in a sexual population the average is two. Therefore the average offspring per female in a population in balance that changes ...
... couples in breeding periods (e.g. [24]). In the case of populations in balance, the average number of offspring per female in an asexual population is one individual, whereas in a sexual population the average is two. Therefore the average offspring per female in a population in balance that changes ...
- NRC Research Press
... particular traits, and numerous post-hoc hypotheses have been proposed to explain the observed pattern. This is also the case for the common lizard, Lacerta vivipara Jacquin, 1787 (e.g., Barbadillo et al. 1995; Šmajda and Majláth 1999; Herrel et al. 2001), the well-known Palaearctic species that has ...
... particular traits, and numerous post-hoc hypotheses have been proposed to explain the observed pattern. This is also the case for the common lizard, Lacerta vivipara Jacquin, 1787 (e.g., Barbadillo et al. 1995; Šmajda and Majláth 1999; Herrel et al. 2001), the well-known Palaearctic species that has ...
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.