Sperm and egg - Study guides, Class notes & Summaries

Question 1. Based on figure 4.1, is it correct to state that we understand deep relationships among Eukaryotes? How do we represent ambiguity in branching pattern on phylogenetic trees? Hint: look at figure 1.27. No, we cannot say we understand deep relationships among Eukaryotes because there is a polytomy that represents ambiguity on the phylogenetic tree. No, you cannot define deep relationships amongst eukaryotes because the nodes include polytomies which signifies ambiguity/indefinite...

What is a hormone and how does it act? Hormones are chemical messengers that are responsible for regulation. They are secreted into body fluids, mainly blood. It has specific actions on target tissues, which are any tissue that has specific receptors for that particular hormone. What is a paracrine gland? a secretion that enters interstitial fluid but affects only neighboring cells What is an autocrine gland? A secretion that only affects the secreting cell. What is an en...

ADH (Antidiuretic Hormone) - ANSWER Comes from Pos. Pituitary, Targets kidneys for water conservation, +/- blood volume and pressure OCT (Oxytocin) - ANSWER Comes from Pos. Pituitary, Targets mammary glands and uterus to induce milk movement into secretory ducts and induce uterine contractions during childbirth, + cervical & uterine stretching ACTH (Adrenocorticotropic Hormone) - ANSWER Comes from Ant. Pituitary, Targets the Zona Fasciculata to stimulate the release of cortisol and adrenal...

BIO 106 WSU EXAM 2 STUDY GUIDE WITH COMPLETE SOLUTIONS 1.Where is the microsporangium located? A. Ovaries B. Filaments C. Anthers D. Petals E. Megasporangium Anthers 2.What ploidy is the female gametophyte? A. 1N B. 2N C. 3N D. 4N E. 6N 1N 3.Seeds develop from an.. A. anther B. Embryo C. Ovule D. ovary Ovule 4.From who's tissue does a fruit develop? A. maternal B. paternal C. zygote (new generation) D. bees Maternal 5.Double fertilization means that...... A. flowers mu...

Health Apex Final Exam Study; Questions and Answers 100% Correct Pregnancy CORRECT ANSWER-nine month period of carrying a developing embryo or fetus in the uterus fertilization CORRECT ANSWER-process by which a sperm cell penetrates an egg after sexual reproduction conception CORRECT ANSWER-union of a male sperm cell and female egg cell zygote CORRECT ANSWER-fertilized egg that has begun cell division fetus CORRECT ANSWER-an unborn child

BIOS 251 Comprehensive Final Exam Review 2023. The following are all levels of the structural organization of the human body: 1. Organ 2. Organ system 3. Tissue 4. Cell 5. Chemical level Arrange the above levels from least complex to most complex: • A. 3, 4, 1, 2, 5 • B. 4, 5, 1, 2, 3 • C. 5, 4, 3, 1, 2 • D. 1, 2, 3, 4, 5 • E. 5, 4, 6, 2, 1 . Feedback: Good work; your answer is correct! Question 2 of 75 1.0/ 1.0 Points Which of the following statement(s) is(are) correc...

1-5 days - - - - menstruation lasts how many days 1) bone formation 2) normal blood clotting 3) transmission of nerve impulses 4) maintenance of skeletal and cardiac muscle contractions - - - - List important processes that require calcium 1) mucosa 2) solomucosa 3) muscularis 4) serosa - - - - Layers of the wall of the alimentary canal from inside out. 14 - - - - ovulation occurs what what day of your cycle ACH - - - - The neurotransmitter released at the neuromuscular junction acro...

karyotyping - number and type of chromosome present Barr body - -condensed inactive X chromosome near nucleus of cell -all females have 1 Barr body nondisjunction - failure of chromosomes to separate during meiosis autosomal nondisjunction - -failure of chromosomes (other than sex chromosomes) to separate during meiosis -exs: trisomy 21, trisomy 18 translocation - portion of one chromosome is transferred to another (usually nonhomologous) abnormal egg (XX) x normal sperm (X) - -zygote: X...

Fertilization Correct Answer-joining of a sperm and an egg to form a diploid zygote Organisms that use external fertilization Correct Answer-most animals who participate in this live in aquatic environments like tadpoles -tend to produce large number of gametes How are gametes released for external fertilization Correct Answer--gametogenesis occurs in response to environmental cues( lengthening days and warmer water temperatures) that indicate a favorable season for breeding -gametes are...

Portage Learning BIOD 152 A&P 2 Final Exam 2023/2024 Identify the parts of the neuron shown in the diagram below a. dendrite b. cell body c. nucleus List the four parts of the human brain The human brain is made up of the cerebral hemispheres, diencephalon, brain stem, andcerebellum. List and describe the 3 meninges of the human brain. The leathery dura mater is the double-layered outer meninx. The middle arachnoid meninx is a loose layer separated from the dura...