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Andrew [12]
3 years ago
13

WILL GIVE BRAINLIEST!!!! :)

Biology
1 answer:
N76 [4]3 years ago
8 0
The first statement describes the environmental factor that affected the skipper butterflies.

When the birds became involved in the skipper butterflies ecosystem, they became a biotic environmental factor. The other answer choices are not environmental factors, but they are adaptations and examples of survival of the fittest.

Hope this helps! Good luck! :)
You might be interested in
Common characteristics supporting the idea that the first land plants were related to green algae include __________.
Vlad1618 [11]

Answer:

Presence of chlorophyll  pigment in the leaves and cell walls were made of cellulose

Explanation:

The first plants that appeared on the land areas were comprised of the main component known as the cellulose that forms the cell wall of the plants and is responsible for making the various parts of plants such as branches, plant stems, and leaves, stronger and supportive.

In addition to this, the leaves of these primitive plants were comprised of green pigments known as chlorophyll that absorbs the sunlight and CO₂, and helps the plants in preparing the food for themselves as well as for the consumers, and also liberates oxygen (O₂) with it.

Thus, these are the two common characteristics that supported the idea that the primitive land plants had a relation with the green algae.

7 0
3 years ago
The smooth but steady increase in muscular tension that is produced by increasing the number of active motor units is called ___
Troyanec [42]

The smooth, but steady, increase in muscular tension produced by increasing the number of active motor units is called a recruitment.

Muscle tension is the force produced when a muscle contracts (or when sarcomeres shorten). The two primary forms of skeletal muscle contractions, isotonic contractions and isometric contractions, are produced when a muscle contracts against a load that is not moving.

  1. A load is transported as the length of the muscle varies during isotonic contractions, in which the tension in the muscle remains constant (shortens). Concentric and eccentric contractions are the two varieties of isotonic contractions.
  2. When a muscle contracts isometrically, the angle of a skeletal joint remains the same while tension is produced in the muscle. Sarcomeres shorten and muscles tense up during isometric contractions, but the load is not moved since the force generated is insufficient to overcome the resistance provided by the load.

To know more about muscle tension click here

brainly.com/question/2794358

#SPJ4

3 0
1 year ago
Which food is incorrectly stored in a walk-in refrigerator? 1. raw ground beef stored on a shelf above a tray of bologna. 2. egg
astra-53 [7]
1 raw meat is always stored on the bottom the blood can contaminate other foods .
8 0
3 years ago
Pls answer its due soon!!!
pickupchik [31]

Explanation:

Meiosis makes genetic variety possible. It makes sperm & egg cells called gametes. Each gamete has 23 chromosomes. To make a diploid cell two gametes (sperm & cell) come together.

During prophase 1 the chromosomes pair up with their homologous pairs so they can transfer their genetic information and exchange it between each other. It makes recombinant chromosomes that influence the genetic diversity between the same people.

Now they are in metaphase 1, the chromosomes are in pairs in the middle of the cell. In anaphase 1, the chromosomes are pulled away by the spindle fibers. Then in telophase 1, there are two formed nuclei. Cytokinesis 1 then splits the cytoplasm.

Now they are in meiosis 2. During prophase 2, there are chromosomes and the spindles are starting to form again without crossing over like in prophase 1. In metaphase 2, chromosomes are going to line up in the middle in both cells unlike during metaphase 1 where the chromosomes were only in pairs.  In anaphase 2, only the chromatids are being pulled away by the spindle fibers. Next in telophase 2 the nuclei reform and the 2 cells are each going to divide into 4 cells. Finally, cytokinesis completely splits the cytoplasm.

Keeping in mind that each sex only produces one type of gamete cell (sperm or eggs), and of the independent assortment and crossing over of chromosomes, the end result will be diversity.

5 0
2 years ago
What are the economic activities in the Amazon forest
Musya8 [376]

Answer:

A substantial part of the Amazon rainforest economy comes from illegal activities, like drug dealing, biological trade and wood cutting. Most drugs that reach Europe and United States are not farmed in the region, but Amazon rainforest serves as a path to drug dealers to deliver their production

Explanation:

4 0
3 years ago
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