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2 years ago

Differentiate between a spider's web and a bird's nest.

Biology

1 answer:

Kruka [31]2 years ago

5 0

Answer:

one is made of silk and one is made from branches and anything to keep it together and for padding

Explanation:

the spider makes the webs out of silk and it traps anything that goes through it. the birds make the nests from branches and litter.

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Which of the following is true about soil color? a. A dark color indicates that the soil is poor in organic matter. b. Bright ye

777dan777 [17]

The only one correct answer would be:

c. Yellow or red hues in the soil indicate the presence of iron or aluminum.

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2 years ago

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Muscle tissues are characterized by the presence of elongated cells, often called ____________ , that can contract to create mov

PtichkaEL [24]

Answer:

1. Muscle Fibers

2. Bones

3. Joints

Explanation:

Muscle tissue is made of muscle fibers. The plasma membrane of a muscle fiber is called sarcolemma while its cytoplasm is known as sarcoplasm. Muscle cells are characterized by the presence of specialized endoplasmic reticulum which is called sarcoplasmic reticulum.

Muscle cells exhibit contractility and extensibility. The ability of muscle cells to shorten their length forcibly in response to a stimulus is their contractility. Muscle fibers have the ability to extend and shorten themselves.

Extension and contraction of muscle fibers are responsible for the movement of the human body and its parts.

Muscles are attached to bones via tendons which in turn are the fibrous connective tissues. Muscles are also part of our joints where they assist in the movement by pulling the bones as well as stabilize and strengthen the joints.

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2 years ago

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According to the cell theory, which of the following are true? select all that apply

Maru [420]

Answer:

Cell theory states that B) All living things are made up of cells and A) cells come from other living cells.

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2 years ago

Place the following events in muscle contraction in the correct sequence from first to last. 1. ATP binds to myosin head. 2. Myo

sladkih [1.3K]

Answer:

The correct sequence of muscle contraction from first to last is given below

Explanation:

step 1 myosin head interacts with actin

step 2 ATP binds to myosin head

step 3 ATP is converted to ADP and Pi

step 4 ADP and pi are released from myosin

step 5 Myosin head pivots in the power stroke

step 6 Myosin head is cocked back.

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2 years ago

1. How did dark matter affect the development of structures in the early universe?

-Dominant- [34]

Answer:

1. It seeded the development of galaxies

2. The percentage of dark matter has shrunk in scientists' estimates since the 1980s

The percentage of unknown material has grown in scientists' estimates since the 1970%

3. Supernovae that are moving away at an accelerating rate.

Explanation:

1. How did dark matter affect the development of structures in the early universe?

It seeded the development of galaxies.

It seeded the development of quasars.

It cooled pockets of gas to form nebulae.

it became part of black holes

2. How has scientific understanding about the composition of the universe changed over time? Select the two correct answers.

The percentage of dark matter has shrunk in scientists' estimates since the 1980s

The percentage of unknown material has grown in scientists' estimates since the 1970%

The percentage of ordinary matter has grown in scientists' estimates.

The percentage of dark energy has shrunk in scientists estimates

3. Which is evidence for the existence of dark energy?

Pulsars that seem to be moving closer at an accelerating rate.

Supernovae that are moving away at an accelerating rate.

Black holes that are expanding at a constant rate.

Galaxies that are rotating at a constant rate.

<u><em>Please don't use these answer's to cheat they are to help only.</em></u>

6 0

2 years ago

Differentiate between a spider's web and a bird's nest.​

Differentiate between a spider's web and a bird's nest.