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3 years ago

Please help me on this its due in class

Biology

1 answer:

nikklg [1K]3 years ago

7 0

Answer:

Pros:

You can get more scientific knowledge of the mammoth

You will be able to clone the mammoth easier
Helping the environment
It will help protect species that are close to extinction
(can't think of anything else, sorry )

Cons:

Different environment
Could go wrong and become an alien
Could carry retroviruses which can harm humans
Might CHANGE the environment for the worse
It might cause more species to go extinct

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Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offsprin

faltersainse [42]

Answer:

2 in 4

Explanation:

If a female cat with orange fur (XOXO) is crossed with a male cat with black fur (XoY) then:

P: XOXO x XoY

F1: XOXo XOY XOXo XOY

This means that half of the offspring will be females with tortoiseshell color (XOXo) and other half of the offspring will be males with orange fur (XOY).

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3 years ago

Natural selection is a process by which the characteristics of a(n) __________ will change over time.

Alla [95]

The answer is individual or organism

Hope this helps

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4 years ago

How many electrons are in the nucleus of an atom with an atomic number of

VLD [36.1K]

None, Electrons are not in the nucleus

They are present in orbits or energy shells. 

6 0

3 years ago

Read 2 more answers

Mention the 10 Phylla of plants. .

victus00 [196]

1. Phylum Heptophyta- Non Vascular Plants (Bryophytes)

Common Name: Liverworts

Estimated Number of Species: 9,000

2. Phylum Anthocerophyta- Non Vascular Plants (Bryophytes)

Common Name: Hornworts

Estimated Number of Species: 100

3. Phylum Bryophyta- Non Vascular Plants

Common Name: Mosses

Estimated Number of Species: 15,000

4. Phylum Lycophyta- Vascular Plants (Seedless Vascular Plants)

Common Name: Lycophytes

Estimated Number of Species: 1,200

5. Phylum Pterophyta- Vascular Plants (Seedless Vascular Plants)

Common Name: Pterophytes

Estimated Number of Species: 12,000

6. Phylum Ginkgophyta- Vascular Plants (Seed Plants: Gymnosperms)

Common Name: Ginkgo

Estimated Number of Species: 1

7. Phylum Cycadophyta- Vascular Plants (Seed Plants: Gymnosperms)

Common Name: Cycads

Estimated Number of Species: 130

8. Phylum Gnetophyta- Vascular Plants (Seed Plants: Gymnosperms)

Common Name: Gnetophytes

Estimated Number of Species: 75

9. Phylum Coniferophyta- Vascular Plants (Seed Plants: Gymnosperms)

Common Name: Conifers

Estimated Number of Species: 600

10. Phylum Anthophyta- Vascular Plants (Seed Plants: Angiosperms)

Common Name: Flowering Plants

Estimated Number of Species: 250,000

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3 years ago

Place these events in the correct order of occurrence in the muscle contraction: End plate potential triggers an action potentia

Sunny_sXe [5.5K]

Answer:

1. Acetylcholine binds to receptors on the motor end plate

2. Ligand-gated channels open leading to depolarization

3. End plate potential triggers an action potential

4. Transverse tubules convey action potentials into the interior of the muscle fiber

5. Calcium is released from the sarcoplasmic reticulum

6. Calcium ions bind to troponin, which then moves tropomyosin

Explanation:

Acetylcholine (ACh) is a signaling molecule (neurotransmitter) that binds to receptors on muscle cells. This binding triggers the opening of ligand-gated sodium channels, thereby ions enter into muscle cells, which causes the depolarization of the sarcolemma and thus promotes the release of Ca2+ ions from the sarcoplasmic reticulum. The myoneural junction, also known as the motor endplate, is the site of synaptic contact between a motor axon and a skeletal muscle fiber. The endplate potential is the voltage that produces the depolarization of muscle fibers when ACh molecules bind to their receptors in the cell membrane. This depolarization spreads in the sarcolemma through transverse tubules (T tubules) and thus generates an action potential. Finally, this action potential induces the release of Ca2+ in the sarcoplasmic reticulum, which activates troponin protein and induces muscle contraction.

4 0

3 years ago