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Ainat [17]
3 years ago
8

The human immunodeficiency virus (HIV) destroys infection-fighting helper T-cells. The body system disrupted by HIV is the _____

__ system.
skeletal

respiratory

immune

excretory
Biology
1 answer:
Sindrei [870]3 years ago
8 0
Answer: immune system
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Fossils are found in _______.
Sergio [31]

Answer:

Sedimentary rocks

Explanation: Where are fossils found? Fossils are found almost exclusively in sedimentary rocks—rocks that form when sand, silt, mud, and organic material settle out of water or air to form layers that are then compacted into rock. So the answer will be <em>Sedimentary</em> rocks.

6 0
3 years ago
Read 2 more answers
Match the following.
lianna [129]

Answer:

The correct match is given below:

Explanation:

  1. A flower containing a pistil, stamen, calyx, and corolla – Complete flower. When a flower consists of essential whorls pistil and stamen and accessory whorls calyx and corolla, the flower is said to be complete.
  2. The collective term for the petals of a flower- Corolla. The corolla is a accessory whorl which consist s of its unit called petal.
  3. It has pistils, but no stamens - Female flower. A flower with only pistil is called unisexual pistillate flower.
  4. A stalk which supports the anther – Filament. A typical stamen consists of an anther, connective and a filament.
  5. A flower that lacks one or more of the following parts: pistil, stamen, calyx, or corolla corolla.—Incomplete flower. A flower which lacks any of the essential or accessory whorl is called incomplete flower.
  6. A flower that has male parts only – Male flower.  A flower with only stamen is called unisexual staminate flower.
  7. A spore produced by meiosis – Meiospores. Spores can produced by mitosis or meiosis. If it is produced as a result of mitosis it is said to be mitospores.    

5 0
4 years ago
Name the type of connective tissue that anchors the ribs onto the sternum.
Kazeer [188]

Hyaline cartilage makes up the costal cartilage that holds the ribs to the sternum. The most prevalent form of cartilage in the body is hyaline cartilage.

<h3>What is hyaline cartilage?</h3>

On the articulating surfaces of bones, in the larynx, trachea, and bronchi, as well as on the sternal ends of the ribs, hyaline cartilage is present. It imparts a rigid yet malleable form to the constructions.

Hyaline structures are connective tissues that anchor the ribs onto the sternum. Such structures and joints are robust because collagen fibers are present, but their mobility and flexibility are constrained. To reduce friction and provide cushioning at the joint surface, articular cartilage, also known as hyaline cartilage, covers the ends of bones.

Learn more about hyaline cartilage here:

brainly.com/question/7283023

#SPJ1

8 0
2 years ago
Overtime, why does natural selection continue to work?
dedylja [7]

Environments are always changing so organisms need to adapt to survive. The organisms that survive are the ones that are fit to live in that environment, which is where survival of the fittest comes into play.

7 0
3 years ago
PLS HELP! WILL GIVE BRAINLIEST
AURORKA [14]

Answer:

70 minutes :  1 hour and 10 minutes

7.6 yards : 22.8 feet

Explanation:

Have a nice day :)

5 0
3 years ago
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