28 - Dr. Jerry Cronin
... to sperm-binding receptors in the zona pellucida causes the Ca2+ levels within the sperm to rise, triggering the acrosomal reaction. Acrosomal enzymes from many sperm digest holes through the zona pellucida, clearing a path to the oocyte membrane. ...
... to sperm-binding receptors in the zona pellucida causes the Ca2+ levels within the sperm to rise, triggering the acrosomal reaction. Acrosomal enzymes from many sperm digest holes through the zona pellucida, clearing a path to the oocyte membrane. ...
zona pellucida
... yolk sac are well formed. The chorionic villi lie in blood-filled intervillous spaces within the endometrium. The embryo is nourished via the umbilical vessels that connect it (through the umbilical cord) to the placenta. © 2013 Pearson Education, Inc. ...
... yolk sac are well formed. The chorionic villi lie in blood-filled intervillous spaces within the endometrium. The embryo is nourished via the umbilical vessels that connect it (through the umbilical cord) to the placenta. © 2013 Pearson Education, Inc. ...
Beluga Whale (Delphinapterus leucas)
... and climate change. In some areas, chemical contaminants have increased bacterial infection, parasites, ulcers, and cancer. What’s being done in Zoos and Aquariums? The study of belugas in zoological parks and aquariums has increased our understanding of factors threatening the sustainability of the ...
... and climate change. In some areas, chemical contaminants have increased bacterial infection, parasites, ulcers, and cancer. What’s being done in Zoos and Aquariums? The study of belugas in zoological parks and aquariums has increased our understanding of factors threatening the sustainability of the ...
WHALE WORMS
... unique tubeworms that feed on the bones of dead whales. The worms are in a new genus called “Osedax,” which is Latin for “bone devourer.” The worms’ bodies and feeding strategies are very different from most animals. They have no eyes, legs, mouths or stomachs, but they do have colorful feathery plu ...
... unique tubeworms that feed on the bones of dead whales. The worms are in a new genus called “Osedax,” which is Latin for “bone devourer.” The worms’ bodies and feeding strategies are very different from most animals. They have no eyes, legs, mouths or stomachs, but they do have colorful feathery plu ...
title of lesson plan - Discovery Education
... characterized by a covering of hair on the skin and, in the female, milk-producing mammary glands for nourishing the young. Context: As mammals, whales use lungs. spermaceti A white, waxy substance consisting of various esters of fatty acids, obtained from the head of the sperm whale or another ceta ...
... characterized by a covering of hair on the skin and, in the female, milk-producing mammary glands for nourishing the young. Context: As mammals, whales use lungs. spermaceti A white, waxy substance consisting of various esters of fatty acids, obtained from the head of the sperm whale or another ceta ...
Humpback Whale Fast Facts
... n Humpback whales migrate to the warm tropical waters to mate and give birth as the Antarctic waters are too cold for newborn calves. n At birth, calves are approximately 4 – 5m long and weigh more than one tonne (1,000kg). n Mother whales feed their calves hundreds of litres of milk each day. ...
... n Humpback whales migrate to the warm tropical waters to mate and give birth as the Antarctic waters are too cold for newborn calves. n At birth, calves are approximately 4 – 5m long and weigh more than one tonne (1,000kg). n Mother whales feed their calves hundreds of litres of milk each day. ...
OIMB GK12 Curriculum CETACEAN INTRODUCTION AND
... actually small whales. Cetaceans have several adaptations to living in the ocean, including streamlined bodies, reduced hair, and a tail adapted as a fluke for propulsion. They also have fused bones in the front “hands” that make great flippers for swimming, and they have a layer of blubber for insu ...
... actually small whales. Cetaceans have several adaptations to living in the ocean, including streamlined bodies, reduced hair, and a tail adapted as a fluke for propulsion. They also have fused bones in the front “hands” that make great flippers for swimming, and they have a layer of blubber for insu ...
English
... WCR for food resources, namely the common Bryde’s whale, Balaenoptera cf. brydei. Whether it migrates seasonally into and out of the region remains to be discovered. Two other species that are regular non-residents, the humpback whale (Megaptera novaeangliae) and the common minke whale (B. acutorost ...
... WCR for food resources, namely the common Bryde’s whale, Balaenoptera cf. brydei. Whether it migrates seasonally into and out of the region remains to be discovered. Two other species that are regular non-residents, the humpback whale (Megaptera novaeangliae) and the common minke whale (B. acutorost ...
wailing about whales: the us – japan dispute in perspective
... the UK alone for the purpose of food. This includes over 2 million cattle and 16 million pigs. It is somewhat unlikely that a protest from Moslem or Hindu countries would see an end, or even a decrease, in these figures. Killing animals for food, rightly or wrongly, is part of most societies. Why sh ...
... the UK alone for the purpose of food. This includes over 2 million cattle and 16 million pigs. It is somewhat unlikely that a protest from Moslem or Hindu countries would see an end, or even a decrease, in these figures. Killing animals for food, rightly or wrongly, is part of most societies. Why sh ...
Overview of Toothed Whales
... Sub-Artic waters • Known as “White Whale” • Extremely large “melon” • Lacks a dorsal fin ...
... Sub-Artic waters • Known as “White Whale” • Extremely large “melon” • Lacks a dorsal fin ...
Bodnar_ecolocation.pps
... •Sequences of clicks, grunts, moans, squeals and chirps are generated. ...
... •Sequences of clicks, grunts, moans, squeals and chirps are generated. ...
Sperm whale
The sperm whale (Physeter macrocephalus), or cachalot, is the largest of the toothed whales and the largest toothed predator. It is the only living member of genus Physeter, and one of three extant species in the sperm whale family, along with the pygmy sperm whale and dwarf sperm whale of the genus Kogia.Mature males average at 16 metres (52 ft) in length but some may reach 20.5 metres (67 ft), with the head representing up to one-third of the animal's length. The sperm whale feeds primarily on squid. Plunging to 2,250 metres (7,382 ft) for prey, it is the second deepest diving mammal, following only the Cuvier's beaked whale. The sperm whale's clicking vocalization, a form of echolocation and communication, may be as loud as 230 decibels (re 1 µPa at 1 m) underwater, making it the loudest sound produced by any animal. It has the largest brain of any animal on Earth, more than five times heavier than a human's. Sperm whales can live for more than 60 years.The sperm whale can be found anywhere in the open ocean. Females and young males live together in groups while mature males live solitary lives outside of the mating season. The females cooperate to protect and nurse their young. Females give birth every four to twenty years, and care for the calves for more than a decade. A mature sperm whale has few natural predators. Calves and weakened adults are taken by pods of orcas.From the early eighteenth century through the late 20th, the species was a prime target of whalers. The head of the whale contains a liquid wax called spermaceti, from which the whale derives its name. Spermaceti was used in lubricants, oil lamps, and candles. Ambergris, a waste product from its digestive system, is still used as a fixative in perfumes. Occasionally the sperm whale's great size allowed it to defend itself effectively against whalers. The species is now protected by a whaling moratorium, and is currently listed as vulnerable by the IUCN.