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3 years ago

Please give an awesome explanation.Ky answer if you're very good at Science/Biology.Please don't put a link to a website.

Biology

1 answer:

ki77a [65]3 years ago

8 0

Answer:

Competition for food happens when there is a limited amount of food resources available. The members of a species that eat that food who are best adapted to access the food are more likely to reproduce and pass on their genes to the next generation.

For example, we have a bird feeder with a narrow opening for food. The small-headed birds can reach the food, the bigger-headed birds cannot. If this was the only food source for this area, then over time, there would be more smaller-headed birds than large-headed birds, due to the competition for food and success/lack of success.

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The fossil record suggests that both the domestic dog (Canis lupus familiaris) and cat(Felis catus) descended from a line of

Svetradugi [14.3K]

Answer:B. Macro Evolution

Explanation:

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3 years ago

Mitosis can occur in both haploid and diploid cells, but meiosis cannot occur in haploid cells. Why not?.

allochka39001 [22]

Mitosis can occur in both haploid and diploid cells because it is equational division where the number of chromosomes remain the same after division. But meiosis cannot happen in haploid cells because it is reductional division and haploid cells do not have any extra copy of chromosomes to be halved.

Mitosis is the cell division where the number of chromosomes do not change after cell division. It usually happens in the somatic cells of the body. Cancer cells also undergo mitosis

Meiosis is the cell division where the number of chromosomes are halved after cell division. The process of meiosis occurs in two phases: meiosis I and meiosis II. The germ cells of the body undergo meiosis.

To know more about mitosis, here

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1 year ago

A couple has two children, both of whom are boys. Show the following cross between a

hammer [34]

Answer:

um 50%

Explanation:

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3 years ago

When an action potential arrives at the axon terminal of a motor neuron, which ion channels open?

HACTEHA [7]

Answer:

Calcium voltage gated ion channels

Explanation:

There are two types of ion channels involved in the neuromuscular junction and end plate potentials: voltage-gated ion channel (responsive to changes in membrane voltage which cause the voltage gated ion channel to open) and ligand-gated ion channel (responsive to certain molecules such as neurotransmitters).

The resting membrane potential of a motor neuron goes from -70mV to -50 with a higher concentration of sodium outside and a higher concentration of potassium inside. <em>When an action potential propagates down a nerve and reaches the axon terminal of the motor neuron, the change in membrane voltage causes the calcium voltage gated ion channels to open allowing for an influx of calcium ions. </em>These calcium ions cause the acetylcholine vesicles to release acetylcholine via exocytosis into the synaptic cleft.

I hope you find this information useful and interesting! Good luck!

3 0

3 years ago

Sophie says dolphins and sharks look very similar so they must be related Jake disagrees says dna evidence has shown that the do

anyanavicka [17]

Answer:

Jake is correct.

Explanation:

Sophie is wrong because although dolphins and sharks can technically be said to be similar, it resulted from convergent evolution, which has nothing to do with common ancestry and rather to do with similar environments for their homes.

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3 years ago