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Plants - msdemarco
... Plant Life Cycles • The gametophyte stage – The plant produces two kinds of sex cells: sperm cells and egg cells. – These cells then join and create a zygote. – The zygote grows and develops into a sporophyte, which creates more spores, starting the cycle over ...
... Plant Life Cycles • The gametophyte stage – The plant produces two kinds of sex cells: sperm cells and egg cells. – These cells then join and create a zygote. – The zygote grows and develops into a sporophyte, which creates more spores, starting the cycle over ...
Sexual health - Stanford Medicine
... - Highly sensitive structure of female external genitals - only known function is pleasure. penis [Stimulation of clitoris is most common way most women achieve orgasm.] - Covered by clitoral hood* when not engorged *(prepuce of clitoris) Consists of: - Glans - Shaft: has small spongy structures tha ...
... - Highly sensitive structure of female external genitals - only known function is pleasure. penis [Stimulation of clitoris is most common way most women achieve orgasm.] - Covered by clitoral hood* when not engorged *(prepuce of clitoris) Consists of: - Glans - Shaft: has small spongy structures tha ...
parasites as a cost of reproduction
... Sexual selection theory proposes that males suffer reduced immune function and increased parasitism as costs of expressing sexual signals. Life-history theory proposes that females suffer the same costs because of inherent trade-offs between reproduction and self-maintenance. Mechanistically, each t ...
... Sexual selection theory proposes that males suffer reduced immune function and increased parasitism as costs of expressing sexual signals. Life-history theory proposes that females suffer the same costs because of inherent trade-offs between reproduction and self-maintenance. Mechanistically, each t ...
Kingdom Animalia (Animals)
... frog produces the eggs. Fertilization of frog eggs is external. During mating, the male frog mounts a female frog and helps to squeeze the eggs from the female’s body. The male will then release sperm on top of the eggs. Once an egg has been fertilized, development begins immediately. The larva of t ...
... frog produces the eggs. Fertilization of frog eggs is external. During mating, the male frog mounts a female frog and helps to squeeze the eggs from the female’s body. The male will then release sperm on top of the eggs. Once an egg has been fertilized, development begins immediately. The larva of t ...
Document
... The umbilical cord is joined to the placenta. Throughout pregnancy the placenta secretes hormones. Changes in the levels of these hormones control the timing of birth. Oxytocin, a hormone which is not produced by the placenta, is also involved in the process of birth. Briefly describe the role of ox ...
... The umbilical cord is joined to the placenta. Throughout pregnancy the placenta secretes hormones. Changes in the levels of these hormones control the timing of birth. Oxytocin, a hormone which is not produced by the placenta, is also involved in the process of birth. Briefly describe the role of ox ...
Crawfish/Crayfish Dissection Prelab Notes
... The green glands are analogous to what human structure? _kidneys_ Based on the crayfish’s habitat, do you think the green gland retains salt in the body of the crayfish, or excretes salt to osmoregulate? Retain salt Nitrogenous waste exits the body through nephridiopores into the surrounding water ...
... The green glands are analogous to what human structure? _kidneys_ Based on the crayfish’s habitat, do you think the green gland retains salt in the body of the crayfish, or excretes salt to osmoregulate? Retain salt Nitrogenous waste exits the body through nephridiopores into the surrounding water ...
Slide 1 - Society for the Advancement of Sexual Health
... female sex and love addicts also meet criteria as outlined in other instruments (HBI, Kalichman SCS, W-SAST)? Were there differences on those scales for those who identified self as sex addict compared to those who ID self as love and relationship addict? What if any was the impact of cybersex activ ...
... female sex and love addicts also meet criteria as outlined in other instruments (HBI, Kalichman SCS, W-SAST)? Were there differences on those scales for those who identified self as sex addict compared to those who ID self as love and relationship addict? What if any was the impact of cybersex activ ...
STERNGRR Examples in representative organisms Synthesis
... Insects have COMPOUND EYES, antennae, sensory hairs, and PHEROMONES (chemicals used by species to communicate with each other) to obtain information from their environment. Draw and label the compound eye and the pheromone image in the space provided. ...
... Insects have COMPOUND EYES, antennae, sensory hairs, and PHEROMONES (chemicals used by species to communicate with each other) to obtain information from their environment. Draw and label the compound eye and the pheromone image in the space provided. ...
Viruses, Bacteria, Protists and Fungi
... obtaining food and energy An organism that cannot manufacture its own food and instead obtains its food and energy by taking in organic substances, usually plant or animal matter. All animals, protozoans, fungi, and most bacteria are HETEROTROPHS. An organism that manufactures its own food from inor ...
... obtaining food and energy An organism that cannot manufacture its own food and instead obtains its food and energy by taking in organic substances, usually plant or animal matter. All animals, protozoans, fungi, and most bacteria are HETEROTROPHS. An organism that manufactures its own food from inor ...
MSM Sexual History Taking
... ● “Do you have sex with men, women, or both?” ● “In the past two months, how many people have you had sex with?” ● “In the past twelve months, how many partners have you had?” If the patient has sex with both men and women, repeat these questions for each specific gender. 2. Sexual Practices In addi ...
... ● “Do you have sex with men, women, or both?” ● “In the past two months, how many people have you had sex with?” ● “In the past twelve months, how many partners have you had?” If the patient has sex with both men and women, repeat these questions for each specific gender. 2. Sexual Practices In addi ...
Welcome to Biology Class2
... Respond to their environment Maintain and stabilize their internal environment As a group, living things change over time ...
... Respond to their environment Maintain and stabilize their internal environment As a group, living things change over time ...
Introduction to Animals
... • Animals with a one-way digestive system have a mouth and an anus • Food enters the mouth, continues in one direction through the digestive tract, and wastes leave through the anus ...
... • Animals with a one-way digestive system have a mouth and an anus • Food enters the mouth, continues in one direction through the digestive tract, and wastes leave through the anus ...
Pregnanc and Fetal Development
... Head passes into the cytoplasm Electrochemical reaction in egg Makes membrane impermeable to other sperm ...
... Head passes into the cytoplasm Electrochemical reaction in egg Makes membrane impermeable to other sperm ...
Kingdom Animalia Part 2
... body specialized for different purposes? – Skeleton- internal, external, or hydrostatic? – Examples- what do animals in this phylum look like? ...
... body specialized for different purposes? – Skeleton- internal, external, or hydrostatic? – Examples- what do animals in this phylum look like? ...
Phylum Nematoda - Demon Internet
... diet. 4: The body design works well at small body size, which is advantageous for most parasitic lifestyles. ...
... diet. 4: The body design works well at small body size, which is advantageous for most parasitic lifestyles. ...
Unit 2 - Practice Exam
... 6. In plasmogamy, the __________ fuses of 2 mycelia to create 1 cell that’s __________________. 7. In karyogamy, the __________________ fuse to create 1 cell that’s ________________. What is this cell called? ______________________ 8. Each fungi phyla is characterized by ____________________________ ...
... 6. In plasmogamy, the __________ fuses of 2 mycelia to create 1 cell that’s __________________. 7. In karyogamy, the __________________ fuse to create 1 cell that’s ________________. What is this cell called? ______________________ 8. Each fungi phyla is characterized by ____________________________ ...
ribbon worms
... Many flatworms like the turbellarians are free-living organisms that dwell on the bottom of the ocean or freshwater habitats or moist places on land. All of the flatworms that belong to class Trematoda, Monogenea, (flukes) and Cestoda (tapeworms) are parasitic. Some are ectoparasites (live on the ou ...
... Many flatworms like the turbellarians are free-living organisms that dwell on the bottom of the ocean or freshwater habitats or moist places on land. All of the flatworms that belong to class Trematoda, Monogenea, (flukes) and Cestoda (tapeworms) are parasitic. Some are ectoparasites (live on the ou ...
InvertebratesOutline..
... 1st closed circulatory system Have setae for locomotion Have nephridia to eliminate metabolic waste Annelids reproduce sexually (most are hermaphroditic) Segmentation is important in the evolution of specialized body tissues Arthropods Bilateral symmetry Coelomates Protostome All a ...
... 1st closed circulatory system Have setae for locomotion Have nephridia to eliminate metabolic waste Annelids reproduce sexually (most are hermaphroditic) Segmentation is important in the evolution of specialized body tissues Arthropods Bilateral symmetry Coelomates Protostome All a ...
How Much Do You Know About Sexual Assault? A True
... The way a woman is dressed or the fact that she is drunk is often why she is raped. Sexual assault is not the result of the way a person dresses or acts. It is the assailant who decides to assault another individual. The victim is not an accessory to the crime. Being intoxicated may make a victim mo ...
... The way a woman is dressed or the fact that she is drunk is often why she is raped. Sexual assault is not the result of the way a person dresses or acts. It is the assailant who decides to assault another individual. The victim is not an accessory to the crime. Being intoxicated may make a victim mo ...
Sexual Homicide Presentation lp version
... they did not intend to murder the victim Is murder committed to eliminate witness? The assault and homicide are two separate events Murder for the sake of reducing the risk of ...
... they did not intend to murder the victim Is murder committed to eliminate witness? The assault and homicide are two separate events Murder for the sake of reducing the risk of ...
AP Biology Syllabus - Mr. Multhaupt`s Biology Page
... Do not feel overwhelmed. Yes there is a lot of information that we will be covered, but I have had numerous students tell me that they felt very prepared for the AP exam. I have also been told by most of the students that despite the amount of work the class entails, they very much enjoyed the cours ...
... Do not feel overwhelmed. Yes there is a lot of information that we will be covered, but I have had numerous students tell me that they felt very prepared for the AP exam. I have also been told by most of the students that despite the amount of work the class entails, they very much enjoyed the cours ...
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.