BIOLOGY HIGH SCHOOL

Animals without backbones are called ________________.a. arthropods
c. invertebrates
b. chordates
d. vertebrates

Answers

Answer 1
Answer:

Answer:

invertebrates

Explanation:

The invertebrates lack a backbone. They include molluscs, annelida, arthropods and protozoa. They have a segmented body and well developed digestive system. Some are mostly found in sea, land or deserts. Some invertebrates lack a rigid exoskeleton. Some are pseudocoelum, possessing cavity between body wall. Some invertebrates have an incomplete digestive system consists of a digestive cavity with one opening which serves as both mouth and anus. Some invertebrates have a complex nervous system consisting of brain and several other sense organs.

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Introducing additional organisms of the same existing kinds will not upset the ecosystem.true or false

Answers


false, because if you add additional organisms, the food web would become lopsided, causing the organisms food to decrease.
false it will need to eat food so if it eats blueberries the animals that eat blueberries will be affected and it needs water and shelter it can even bring down a ecosystem.

Mitosis in eukaryotic cells is equivalent to which of these in prokaryotic cells? Select one: a. transformation b. binary fission c. conjugation d. holozoic reproduction

Answers

Answer:

transformation is the correct one

Select the best answerWhich of the following events define the Proterozoic eon?

-eukaryotic cells first seen
-stable continents
-first bacterial fossils
-Cambrian explosion
-oxygen builds up in atmosphere

Answers

proterozoic eon - oxygen builds up in atmosphere. 

Eukaryotic cells first seen

oxygen build up

stable continents

Which STD can be spread by skin-to-skin contact? (1 point)genital warts
AIDS
hepatitis B
gonorrhea

Answers

sexually transmitted diseases quiz answers:

1. D

2. false

3. B

4. A

5. B

6. C

7. false

8. C
Genital Warts / HPV can be spread by skin-to-skin contact

What is the land like where Mesosaurus fossils are found?Word Bank
Apart
Continent
Earthquake
Fossil
Mesosaurus
Ocean
Outer Layer
Plate
Plate Boundary
Movement

Answers

The Mesosaurus fossils  mainly observed  in hard solid rock on two different plates of Earth’s surface such as the South American and African plates, where the outer covering is solid rock and divided into sections called plates. Word Bank are Mesosaurus fossils.

What is Mesosaurus fossil ?

The Mesosaurus fossils are the  extinct species of animal which include freshwater reptilian predator with similar characteristics to the modern-day crocodilians.

Thes fossils are the ancient animal among the first two  were used to support the theory of continental drift, the fossils of Mesosaurus are found in central, south of western, and southwestern South America regions on one side, and south of central, and western half of southern Africa.

Learn more about  Mesosaurus fossils, here:

brainly.com/question/18775974

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Answer:

Mesosaurus, (genus Mesosaurus), early aquatic relative of reptiles, found as fossils from the Early Permian Period (299 million to 271 million years ago) in South Africa and South America. Mesosaurus lived in freshwater lakes and ponds. Elongated and slim, it measured about 1 metre (3.3 feet) long.

Explanation:

Mesosaurus fossils are found today in rocks in southern Africa and eastern South America. Back in the Permian those two locations were jammed against each other as part of the southern half of Pangaea called Gondwana, so the living range of Mesosaurus did not span an entire ocean.

Hemophilia is a condition in which blood does not clot naturally, and a person with hemophilia could bleed to death if injured. A hemophiliac must receive regular injections of what blood part to stay alive?

Answers

As we know our blood has four main components which are plasma, red blood cells, white blood cells and platelets. That is why a hemophiliac must receive regular injections of platelets to stay alive. This is done by injecting into their bloodstream human plasma which contains many proteins, glucose, clotting factors, electrolytes, hormones, and carbon dioxide.


I hope it helps, Regards.
A Hemophiliac must receive regular injections of blood platelets to stay alive. It is a fact that our blood has four different constituents and they are red blood cells, plasma, white blood cells and platelets. Human plasma is injected into the blood streams and this plasma that contains clotting factor, various proteins, glucose, hormones, electrolytes etc.
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