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MArishka [77]
2 years ago
9

Marsupials, such as kangaroos and koala bears, are mammals. Humans are mammals, too. However, there are differences between mars

upials and humans. For instance, the average baby human is born after spending 38-40 weeks inside of its mother, but baby marsupials are born after only 4-5 weeks. What feature does a marsupial possess that allows babies to be born earlier? A. an egg sac B. a pouch C. fur D. a uterus
Biology
2 answers:
belka [17]2 years ago
3 0
I think the answer is

B. Pouch
Maurinko [17]2 years ago
3 0

Answer:

THE ANSWER IS B POUCH

Explanation:

STUDY ISLAND

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A medical researcher is investigating the chemical and physical properties of substance that she isolated from the surface of ch
LekaFEV [45]

Answer:

the scientist has determined that the chemical isolated from charcoal-grilled meat is an oxidant.

Explanation:

oxidants are oxidizing agents. oxidants have the capacity to damaging living cells. vitamin C on the other hand is an active antioxidant, hence it was able the breakdown of the cells.

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1 year ago
What percentage of sheep had a body height of 1.2 meters or more 30 years ago? How does it differ from the present data? Does th
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Answer:Thirty years ago, 45 out of 200 individuals, or 22.5% of individuals, were at least 1.2 meters tall. Presently, 50.5% of individuals are at least 1.2 meters tall. Meanwhile, individuals below 1.2 meters in height have decreased significantly between the two years of data. This data supports the argument that directional selection is occurring.

Explanation:

8 0
1 year ago
Susana heats up a sample of red crystals. While the sample is being heated, a gas is released and a blue powder is left after th
Nonamiya [84]

Answer:

You can use either your answer or the sample answer you gave. You are so nice by the way!

Explanation:

THE FOLLOWING ARE TWO ANSWERS YOU CAN CHOOSE FROM

ANSWER 1:

The red crystals are compounds. This is because when the sample is heated, a GAS (element) is released and BLUE POWDER (element) is left. Two elements make up these red crystals. A compound can also be shown through color change - the RED crystals, when heated, turn into BLUE powder. Elements cannot be broken down into substances using physical force, like heating. So yes, this is a compound.

ANSWER 2:

The red crystals are compounds. This is because when the sample is heated, a GAS (element) is released and BLUE POWDER (element) is left. Two elements make up these red crystals. A compound can also be shown through color change - the RED crystals, when heated, turn into BLUE powder. Elements cannot be broken down into substances using physical force, like heating. So yes, this is a compound.

EITHER ONE YOU CHOOSE WILL BE CORRECT, JUST SAYING!

3 0
1 year ago
A synovial joint is surrounded by a two-layer ____________ which encloses a fluid-filled space called the ____________ . the out
zloy xaker [14]
<h3><u>Answer; </u></h3>

<em><u>-Joint capsule </u></em>

<em><u>-Synovial cavity </u></em>

A synovial joint is surrounded by a two layer<em><u> joint capsule</u></em> which encloses a fluid filled space called the <em><u>synovial cavity. </u></em>

<h3><u>Explanation; </u></h3>
  • <em><u>Synovial joint is a type of a joint that joins bone with fibrous joint capsule which is continuous with periosteum of the bones that have been joined.  </u></em>
  • <em><u>Joint capsule is an envelope that encloses the synovial joint and is also known as the articular capsule</u></em>.
  • Joint capsule comprises of an outer fibrous layer membrane and the inner synovial layer membrane.
<h3><u>Answer; </u></h3>

Dense connective tissue

The outer layer of this structure consists of <em><u>dense connective tissue</u></em> which is continuous with the periosteum of each bone

<h3><u>Explanation; </u></h3>
  • <em><u>The outer layer of the joint capsule is a fibrous membrane that is attached to the circumference of the articular end of each bone on the joint, therefore it surrounds the articulation.  </u></em>
  • This layer is made up of dense connective tissue which is irregular that is continuous with the periosteum of each bone in the joint. The tissue is a long spongy tissue
<h3><u>Answer; </u></h3>

Ligaments

The outer layer may be reinforced by<em><u> ligaments </u></em>which are bundles of collagenous fibers. Some of these bundles are part of the capsule while other are located outside of the capsule.

<h3><u>Explanation; </u></h3>
  • <em><u>Ligaments are fibrous connective tissues that help in the articulation of bones to other bones. Ligaments are bundles of collagenous fibers which appear as a crisscross bands which attach bone to bone and help in the stabilization of joints. </u></em>
  • <u><em>Ligaments surrounds a joint to give it support and also limits the movement of these joints. </em></u>Therefore when ligaments are damaged, the joints involved becomes unstable.
<h3><u>Answer; </u></h3>

Accessory structure

By definition, the structures, such as some ligaments, that are located outside the capsule are called<em><u> accessory structures. </u></em>

<h3><u>Explanation; </u></h3>
  • <em><u>The synovial joint such as the knee joint contains a synovial cavity and dense, irregular connective tissue which makes the joint capsule normally associated with accessory ligaments</u></em>. These structures are called the accessory structures of the synovial joints.
  • <em><u>The accessory structures are the pieces that help to strengthen and connect the joint. </u></em>They include the fibrocartilage, fat pads, tendons, Accessory, Extracapsular, intracapsular ligaments and the bursae.
<h3><u>Answer; </u></h3>

Synovial membrane

The inner layer of the joint capsule is <em><u>the synovial membrane,</u></em> consisting of loose connective tissue.

<h3><u>Explanation; </u></h3>
  • <em><u>Synovial membrane is a connective tissue which lines the inner surface of the joint capsules in a synovial joint and the tendon sheath. </u></em>It may be described as a layer that lines the cavities of synovial joints bursae and the tendon sheaths.
  • <u><em>The membrane functions to secrete the synovial fluid which lubricates the articulating joints.</em></u>  
<h3><u>Answer; </u></h3>

Synovial fluid  

The inner lining of the joint capsule secretes a fluid called <em><u>synovial fluid. </u></em>This fluid is viscous, and moistens and lubricates the surfaces within the joint capsule

<h3><u>Explanation; </u></h3>
  • <em><u>Synovial fluid is a special type of viscous fluid that is secreted by the synovial membrane in a synovial joint such as knee joint whose function is primarily lubrication of the joint. </u></em>
  • <em><u>The fluid contains special contents such as hyaluronan, lubricin and the interstitial fluid </u></em>which help in the reduction of friction between the articular cartilage of synovial joints when the joints are moving.

3 0
1 year ago
Read 2 more answers
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