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3 years ago

Name three substances organisms can be trapped in and eventually result in a fossil.

1 answer:

Taya2010 [7]3 years ago

6 0

Organisms can be trapped in amber, as has been seen by many prehistoric insects. Another substance would be rock, as shown by the trilobites that are well-known to exist in places like Ohio. Third, organisms can be trapped in ice, such as through the glaciers that were part of the North American continent for many thousands of years.

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I need help with this question, please!

tresset_1 [31]

Answer:

Explanation:

they speed up and spread apart because of the heat

4 0

3 years ago

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Analyze the relationships between the anatomical structures and physiological functions of the muscular system by matching the t

Afina-wow [57]

Answer:

a. Endomysium 8. The layer of connective tissue that surrounds an individual muscle fiber

b. Epimysium 6. The layer of connective tissue that surrounds a skeletal muscle

c. Fascia 3. Connective tissue located between adjacent muscles

d. Fascicle 12. A small bundle of muscle fibers within a muscle

e. Myosin 11. Protein found within a thick filament

f. Perimysium 4. The layer of connective tissue that separates a muscle into small bundles

g. Sarcolemma 5. The plasma membrane of a muscle fiber

h. Sarcomere 7. Unit of alternating light and dark striations between discs (lines)

i. Sarcoplasm 2. The cytoplasm of a muscle fiber

j. Sarcoplasmic reticulum 9. A cellular organelle in muscle fiber corresponding to the endoplasmic

k. Tendon 10. The cordlike part that attaches a muscle to a bone

l. Transverse (T) tubule reticulum 1. Membranous channel extending inward from muscle fiber membrane

Explanation:

A muscle has around it epimysium, which is connective tissue. Inside the epimysium, there are fascicles, and around each of them, there is perimysium. Inside every fascicle, there are muscle fibers, each of them is surrounded by a connective tissue called endomysium. Between every muscle, there is also connective tissue and is called fascia. The connective tissue has vessels and provides support.

The muscle cells are called fibers. They have a membrane, the sarcolemma, a cytoplasm, the sarcoplasm, and a sarcomere, which is the functional unit of the fiber, in other words, it is the structure responsible for the contraction. The sarcomere has different bands made of thick filaments of myosin and thin filaments of actin. They are the light and dark striations that go from disc z to disc z when we observe the sarcomere under a special microscope. The sarcoplasmic reticulum is the place that stores the calcium necessary for the contraction of the fiber, and the transverse tubule reticulum allows the contraction of various fibers since they spread the action potential amongst fibers.

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3 years ago

A new pest is found that only feeds on corn plant leaves. Livestock eat corn cobs. Which promoter would you choose if the modifi

aleksandrvk [35]

Answer:

Promoter 2

Explanation:

Promoter 2 is the best choice because the resistance gene will only be expressed in the leaves of the corn plant. Promoter 3 only expresses genes in the corn roots, so the toxin would not be available in the leaves for the pest to eat. Promoters 1 and 4 would express the resistance gene in the leaves of the corn plant, but the toxins would be expressed in the corn cobs as well, which may then be fed to livestock.

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3 years ago

What is the name of the pumping of an earthworm?

Andrew [12]

The name of the pumping organs of an earthworm is called the Aortic Arches.

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3 years ago

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The two types of feature analysis are ___________ and ____________.

Assoli18 [71]

Bottom-up processing
top-down processing

I hope this helps and have a wonderful day filled with joy!!

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3 years ago

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