It has been observed that sharks can go up to approximately 6 weeks without feeding. The record for a shark fasting was observed with a Swell Shark, which did not eat for 15 months. How do sharks survive without food? Sharks can also go without food for long periods. These fish can do so because […]
Author: Marilyn Medina
Do Tomato Flowers Need To Be Pollinated?
Tomatoes are self-pollinating, meaning they have flowers that contain both the male and female parts, so more than one plant is not needed for reproduction. Why does my tomato plant have flowers but no fruit? Insufficient light – A lack of adequate light is one of the main reasons for non-fruiting, as the plants require […]
Do You Cover Tomato Seeds To Germinate?
There is an important caveat about tomato seedlings and mini-greenhouses: If you’re covering your seeds to keep them warm, you must remove the cover as soon as they start to germinate. Otherwise, they may succumb to damping off disease, a fungal infection that proliferates in still, moist air. Do tomato seeds need to be covered? […]
Does Tomato Grow From Stem?
One of the advantages of propagating tomato plants by stem cuttings is that it can take tomato seedlings (started from seed) 6 to 8 weeks before they reach transplanting size. If you keep tomato cuttings warm, the transplanting time frame is cut down to a mere 10 – 14 days. Is tomato a plant or […]
How High Can Mako Sharks Breach?
Shortfin makos are the fastest species of shark, according to Shark Insider, and capable of leaping up to 20 feet out of the water. How high can sharks breach? But this wasn’t an ordinary leap because it managed to get itself 15 feet (4.57 meters) above water. In context, according to Sharks World, a typical […]
What Shark Can Jump 100 Feet Out Of The Water?
HUNTINGTON BEACH, Calif. (KABC) — A surfer’s GoPro Camera captured a startling sight – a great white shark leaping out of the water. Drew Palumbo and his friend were surfing at Sunset Beach in Huntington Beach on Monday when the shark went airborne, flying out about 100 feet away. How far can a shark jump […]
What Do Sharks Use To Hunt Prey?
Rather than hone in on their prey using their eyes, sharks are armed with a ‘sixth sense’ called electroreceptionelectroreceptionElectroreception and electrogenesis are the closely-related biological abilities to perceive electrical stimuli and to generate electric fields. Both are used to locate prey; stronger electric discharges are used in a few groups of fishes to stun prey.https://en.wikipedia.org […]
Are Sharks Spines Made Of Bone?
Do Sharks Have Vertebrae? The simple answer to the question do sharks have vertebrae is yes. Sharks are classed as vertebrates because they have a spinal column just like a human, but there’s nothing in the definition that says it must be made of bone. The primary role of the vertebrae is to protect the […]
Are Sharks Made Out Of Cartilage?
Cartilaginous skeleton Unlike fishes with bony skeletons, a shark’s skeleton is made out of cartilage. This is a flexible but strong connective tissue that’s also found throughout the human body, in places like the nose, ears, and in joints between bones. Do sharks have bones or cartilage? Sharks do not have bones. They are a […]
Why Sharks Do Not Have Bones?
Our bodies need the unbending strength of bone to support their weight on land. In the water, however, sharks’ cartilaginous skeletons have helped them survive and thrive. Since cartilage is lighter than bone, sharks don’t have to work as hard to swim. This is very important, because they sink if they stop swimming. Why do […]
Do Great White Sharks Have Hearts?
A shark’s heart is a two-chambered S-shaped tube, small in proportion to body size. Blood flows from the heart to the gills and then to body tissues. Fast-swimming sharks, such as great whites and makos, have a body temperature that can be quite a bit higher than the surrounding water (up to 8°C or 14.4°F […]
Why Do Sharks Need To Swim Fast?
Sharks are built for bursts of speed as they attack their prey, much like lions and tigers on land. They need to be able to swim fast enough to pursue their prey for short distances, then make the lunge for the kill. The speed of a shark also depends on the species. Why do sharks […]
What Is Shark Made Of?
Sharks are cartilaginous fish. This means they have a skeleton made of cartilage, a lighter and more flexible substance than bone. What is shark skin made of? Unlike most other fish in the ocean, shark skin is made of dermal denticles, or “skin teeth.” Despite their slick appearance, you can see under a microscope that […]
How Do Sharks Vomit?
No so with sharks. They have a neat trick called “gastric eversion” up their proverbial sleeve. Basically, if a shark wants or needs to eject its belly contents, it just FLIPS its stomach out of its mouth, and everything goes flying — a little like dumping out your pockets to empty them. How do sharks […]
Are Sharks The Fastest Swimmers?
The general rule of thumb is that sharks can cruise at about 5 mph (8 kph)—roughly the same speed as the fastest Olympic swimmer. If you’re just a good swimmer, they have you beat. But often they are swimming around at a slower speed of about 1.5 mph (2.4 kph). These fish are predators. Why […]
Are Great White Sharks Asexual?
Female sharks can reproduce without having sex, scientists have found. A female hammerhead shark has given birth without mating with a male and its offspring has no paternal DNA. This is the first scientific report of asexual reproduction in sharks. Female sharks can reproduce without having sex, scientists have found. How does the great white […]
Why Can’T Sharks Breathe Air?
Sharks don’t have lungs, but they do have to breathe oxygen to survive. Instead of breathing air, though, sharks get oxygen from the water that surrounds them. The concentration of oxygen in water is much lower than in air, so animals like sharks have developed ways to harvest as much oxygen as they can. Is […]
Can A Shark Bite Through Human Bone?
No, they do not. Sharks have cartilage all over their bodies. Cartilage is weaker than bone but is way more flexible. You have cartilage in your nose and ears! Can sharks bite through bone? The jaws of a great white shark can inflict a bone-crunching bite of up to 1.8 tonnes, according to Australian researchers. […]
Do Great White Sharks Have Red Blood?
As in humans, sharks have two basic types of blood cell, white and red. White blood cells are primarily involved in the body’s immunological defense against foreign invaders (such as disease-causing microbes), while red blood cells are the main carriers of respiratory gases. Do sharks have red blood cells? Jaws are loosely attached to it. […]
Do Sharks Have A Single Or Double Circulatory System?
Sharks have a two-chambered heart and have a single-circuit circulatory system. The heart pumps blood to the gills, where it is oxygenated. Do sharks have single or double circulation? In shark (fish), the heart pumps out deoxygenated blood which is oxygenated by the gills and sent to the body j parts from where deoxygenated blood […]