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Masja [62]
3 years ago
11

One of the "triggers" proposed for the Cambrian explosion is a dramatic rise in oxygen concentrations that occurred in the ocean

s about 800 mya. Make a small concept map outlining the logic behind the "oxygen-trigger" hypothesis for the Cambrian explosion. Match the words in the left column to the appropriate blanks in the sentences on the right.
high
donor
larger
smaller
acceptor
faster
less
more
slower
low
available
1. Oxygen is an effective final electron (a)_______in cellular respiration because of its (b)______electronegativity.
2. Organisms that use it as a final electron (c)_______can produce (d)________usable energy than organisms that do not use oxygen, but only if it is (e) _______ .
3. With (f)______available energy, aerobic organisms can grow (g)________and move (h)_______ .
Biology
1 answer:
ZanzabumX [31]3 years ago
3 0

Answer:

1. Oxygen is an effective final electron acceptor in cellular respiration because of its high electronegativity.

2. Organisms that use it as a final electron acceptor can produce more usable energy than organisms that do not use oxygen, but only if it is available.

3. With more available energy, aerobic organisms can grow larger and move faster.

Explanation:

1. Cellular respiration is an aerobic pathway because oxygen is an electron acceptor. This process produces 38 molecules of ATP per glucose. The atomic elements that are positioned at the right of the periodic table have high electronegativities because they tend to be electron acceptors.  

2. The efficiency of energy production of aerobic respiration is much higher compared to the anaerobic respiration because this metabolic pathway (aerobic respiration) can produce 38 molecules of ATPs per glucose molecule, while anaerobic respiration produces only 2 ATPs by glucose.

3. A higher amount of available energy improves the metabolic profile of the organisms with aerobic respiration.

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An important challenge to traditional (pre-1860) ideas about species was the observation that seemingly dissimilar organisms suc
katen-ka-za [31]

Answer:

Dissimilar organisms might have evolved from a distant, common ancestor.

Explanation:

First of all we should know species. Species is considered as a basic unit of taxonomic classification of an organism.

Initially, the scientists are agreed on this phenomenon that all distinct species are evolved gradually from common ancestor. Today, the species which are different from each other just like hummingbirds, humans and whales are from the same ancestor but with the time passage genetic mutation occurs and at the end dissimilar organisms we can see in our environment/surroundings.

6 0
3 years ago
Which of these observations illustrate regional specialization in the human nervous system?
Savatey [412]
<h2>Regional specialization of  Human Nervous System</h2>

Explanation:

The statements that illustrate the regional specialization of human nervous system are-

a. Sensory information may be processed in the occipital lobe or the temporal lobe.

c. Reading a printed word out loud and then thinking of a related word involves the visual cortex, Broca’s area, and the frontal and temporal lobes.

Humans have the most developed nervous system among all the living organisms. Various parts  of the nervous system has been specialized  for various function. The human brain has been divided into different parts like cerebellum, cerebrum , medulla oblongata etc which are further divided into specialized parts. Each part is specialized to carry out particular function. Moreover, the nervous system has different types of neurons like motor neuron, sensory neurons and interneurons. Each type of neuron has specialized function.

8 0
3 years ago
What is the dating process that doesn't exactly identifies the age of a rock?
hjlf
Carbon dating is a process that estimates the age of anything. However, there are flaws that exist. It may not be a precise number, but it does gives a good estimation.
4 0
3 years ago
In squash, yellow seeds are dominant over green seeds. If two heterozygous yellow seed squash were crossed, what are the genotyp
Umnica [9.8K]

Answer:

The result of cross two squashes with yellow seeds is an offspring of squash with green seeds -dominant caracter- heterozygous and yellow seeds squashes in a genotype proportion 1:2:1  and phenotype proportion 3:1

Explanation:

The cross of two heterozygous individuals for a characteristic results in an offspring that will have both characteristics in pure and heterozygous form. It is a cross monohybrid which complies with the principle of independent segregation exposed by Mendel.

For the characteristic "seed color" the green color would be G and yellow represented as g.

At the cross of two heterozygous squashs:

- Parents: Gg X Gg

- <u>Punnett's Square</u>:

Alleles    G         g

G           GG       Gg

g           Gg        gg

Offspring:

  • A pumpkin of green seeds GG (25%)
  • Two pumpkins of green heterozygous seeds Gg (50%)
  • One pumpkin of yellow seeds gg (25%)

Genotype proportion 1:2:1

Phenotype proportion 3:1

8 0
3 years ago
Sperm are created through meiosis in an area of the testes called the seminiferous tubules. Through which structure do the sperm
Alborosie

Answer:

Epididymis

Explanation:

From the testes, the sperms travel to the epididymis. These structures can be found resting on top of each testes. Fresh out of the testes, sperms are not yet matured and this is where the epididymis takes over. The sperm are stored here and this is where sperm matures. From here, the sperm moves into the vas deferens.

6 0
3 years ago
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