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Alika [10]
2 years ago
12

50 Points 8. Why does Australia have so many genetically distinct organisms?

Biology
1 answer:
Gnoma [55]2 years ago
8 0

Answer:

Australia has so many genetically distinct organisms because it has been separated from other bodies of land for a very long time. This has given species in Australia a long time to evolve independently from species in other areas of the world.

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You cross two true-breeding parents (one with yellow seeds and one with green seeds), grow and self-pollinate the F1 generation,
Andru [333]

Answer:

1500

Explanation:

Let's assume that the allele for yellow seed color is "Y" and the allele for green seed color is "y". Genotype of pure breeding yellow seeded plant would be "YY" and that of the green seeded plant would be "yy". A cross between YY and yy gives all heterozygous yellow seeded plants (Yy) in F1 progeny. Self pollination of two F1 plants (Yy x Yy) obtains F2 generation in 3 yellow: 1 green ratio.

The total population size of F2 generation = 2000

The proportion of yellow seeded plants in F2 generation = 3/4 (since the F2 phenotype ratio is given 3 yellow: 1 green)

Therefore, total number of yellow seeded plants in F2 progeny = 3/4 x 2000= 1500

3 0
3 years ago
Meristematic cells called the _____ add width to the plant body.
bulgar [2K]

<span>vascular cambium
</span><span>

Apical Meristems are found in the tips of the roots and in the buds of the shoots. They supply cells for the plants to grow in length.

Apical Meristems are found in herbaceous plants, woody plants, grasses, and flowering plants.

In flowering plants, shoot apical meristem develops into an inflorescence meristem which produces the floral meristem. The floral meristem is responsible for the production of the sepals, petals, stamens, and carpels of the flower.
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7 0
3 years ago
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A series of interconnected food chains are known as
Phantasy [73]
I believe the answer to this question is a food web.

Food Web definition: "<span>a series of organisms related by predator-prey and consumer-resource interactions; the entirety of interrelated food chains in an ecological community." 

Source: </span>http://www.dictionary.com/browse/food-web
6 0
3 years ago
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irina [24]

Answer:

Increases homocysteine levels

Explanation:

Homocysteine is an aminoacid that is resent in our blood already. This is mostly increased in our blood due to increased consumption of meat and other potential reasons, such as smoking.

High level of this aminoacid are linked to the development of heart diseases. This is because a high homocysteine level causes development of heart diseases along with other risks of renerl diseases.

Hope it helps!

6 0
3 years ago
Why are lichens a good pioneer species after a volcanic eruption?
Leni [432]
The question is asking to choose among the following choices that states the reason why are lichens a good pioneer species after a volcanic eruption, and base on my research, <span>They are able to grow on bare rock. I hope this would help.
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6 0
3 years ago
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