They have a bony endoskeleton with a backbone but no jaws; they breathe only with lungs; they have four limbs, with the two front limbs modified as wings; their skin is covered with feathers;
they have amniotic eggs
; they are endothermic.
Do stingrays have amniotic eggs?
They have a backbone and jaws; their endoskeleton is made of bones; they have thick, fleshy fins; they are ectothermic. They have a bony endoskeleton with a backbone and jaws; they breathe only with lungs; they have four limbs; their skin is covered with scales;
they have amniotic eggs
; they are ectothermic.
Do fish have Amniote eggs?
| Amniotes Temporal range: Pennsylvanian–Present (Possible Mississippian record) | Superclass: Tetrapoda | Clade: Reptiliomorpha | Clade: Amniota Haeckel, 1866 | Clades |
|---|
Are ray-finned fish Ectotherms?
ray-finned fish:
Ectothermic fish
with a backbone and jaws; endoskeleton is made of bones; have thin, bony fins; one of two types of bony fish. reptile: Ectothermic, tetrapod vertebrate that lays amniotic eggs; includes crocodiles, lizards, snakes, and turtles.
Which of the following are amniotes?
- The presence of a fluid-filled sac (amnion) around the embryo during its development is a key feature of amniotes.
- Amniotes include three groups, namely Reptilia, Aves, and Mammalia.
- Amniotic eggs are an adaptation to the evolution of terrestrial organisms and serve as a source of moisture and shock absorber.
What organisms are amniotes?
Amniota, a group of limbed vertebrates that includes
all living reptiles (class Reptilia), birds (class Aves), mammals (class Mammalia), and their extinct relatives and ancestors
.
Do ray-finned fish have vertebrae?
Most actinopterygians have complex skeletons of true bone (sturgeons and paddlefishes are exceptions).
Ray-finned fishes are the dominant aquatic vertebrates today, making up about half of all vertebrate species known
.
Is a stingray an amphibian?
Stingrays are a group of sea rays, which are
cartilaginous fish
related to sharks.
Are sharks amniotes?
Amniotes include mammals, reptiles, birds, and the extinct mammal-like reptiles (theropsids) and dinosaurs. Of all 38 animal phyla, only one has amniote members — Chordata, and even then,
many chordates, which include fish, sharks, rays, and amphibians, are not amniotes
.
What is an amniote and which animals on this tree are amniotes?
Amniotes are
a clade of tetrapod vertebrates comprising the reptiles, birds, and mammals
. Amniotes are characterized by having an egg equipped with an amnion, an adaptation to lay eggs on land or retain the fertilized egg within the mother.
What does the chorion do?
In mammals (except marsupials), the chorion
develops a rich supply of blood vessels and forms an intimate association with the endometrium (lining) of the female’s uterus
. Chorion and endometrium together form the placenta, which is the embryo’s principal organ of respiration, nutrition, and excretion.
Which animal is not an amniote?
Answer and Explanation: The animal that is NOT an amniote is A)
bullfrog
. Amniotes are vertebrates that are within an amnion during embryonic or fetal development.
Do ray-finned fish have hair?
They have a bony endoskeleton with a backbone and jaws; they breathe only with lungs; they have four limbs;
their skin is covered with hair or fur
; they have amniotic eggs; they have mammary (milk-producing) glands; they are endothermic.
Is a stingray vertebrate or invertebrate?
The stingray “is the only
vertebrate
we’ve documented that has seasonal changes in tooth shape,” Kajiura said. The male stingray uses its sharper teeth to secure himself to a mate during reproduction, as stingrays are rather slippery.
Are bony fish endothermic or ectothermic?
Answer and Explanation:
All fish, whether bony or not, are ectothermic
. Their internal temperatures closely match the temperature of the water around them.
What are amniotes give four examples?
Examples of amniotes are
reptiles, birds, and mammals
. The reptiles and birds lay eggs on land where the latter hatch in time. The mammals retain their fertilized egg inside the uterus where the embryo develops into a fetus and is delivered alive at birth.
Which of these are amniotes group of answer choices?
Answer and Explanation: Among
turtles, lungfish, fish, and amphibians
, only the turtles are classified as amniotes.
What are amniotes and non amniotes?
Amniotes are higher vertebrates who have an amnion during their embryonic stage. Anamniotes are lower vertebrates who do not have an amnion during their embryonic stage
.
Which of the following are derived characteristics of amniotes?
Additional derived characteristics of amniotes include
waterproof skin, due to the presence of lipids, and costal (rib) ventilation of the lungs
. Figure 29.4A. 1: Amniotic eggs: The key features of an amniotic egg are the chorion, amnion, and allantois.
What were the first amniotes?
The first amniotes evolved from their amphibian ancestors approximately 340 million years ago during the Carboniferous period. The early amniotes diverged into two main lines soon after the first amniotes arose. The initial split was into
synapsids and sauropsids
.
What are the characteristics of ray-finned fish?
The anatomy of ray-finned fish shows many of the characteristics common to all chordates:
pharyngeal slits, a nerve cord, and body wall muscles arranged in myotomes, or segmented blocks
. Ray-finned fish also have several unique anatomical features that suggest adaptation for an aquatic lifestyle.
What is the difference between ray-finned fish and lobe-finned fish?
Answer. ❏The ray-finned fish have fin rays, with fins supported by bony spines known as rays. The lobe-finned fish are characterized by fleshy lobed fins, as opposed to the bony fins of the ray-finned fish. There are two types of living lobe-finned fish: the coelacanths and the lungfish.
Which one is an example of a ray-finned fish?
The ray-finned fishes include some of the most well-known fish, including
tuna, cod, lionfish, and even seahorses
.
Is Salamander an amphibian?
Salamanders are tailed amphibians
with distinct heads and occur largely in the Northern Hemisphere (Holoarctic). Most have four well-developed limbs. About 619 species are known, distributed among 10 families. Most salamanders live in moist habitats, frequently adjacent to or in streams, lakes, or swamps.
Are stingrays mammals or fish?
Stingrays and skates are both elasmobranchs, meaning they are
cartilaginous fish
whose skeleton is made of cartilage instead of bone. They have some pretty famous relatives: sharks are also elasmobranchs!
Why are stingrays flat?
They are related to sharks, and like their shark cousins, they do not have bones. Instead, their bodies are supported by cartilage—the same material that you feel inside the tip of your nose.
Stingrays have broad fins that run the full length of their bodies
, giving them a flat, roundish shape.
