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Effectus [21]
3 years ago
15

Variation in a trait is a required condition for natural selection to act on a population for that trait. Assuming a population

of organisms only started with only one form of a trait, what are two ways variation in the trait could be introduced into the population?
Biology
1 answer:
Sveta_85 [38]3 years ago
4 0

Answer:

I) Sexual reproduction

II) Mutation

Explanation:

Variations refer to the difference observed within organisms of the same species. Variation are introduced into a population by:

- new genetic combinations that occur during sexual reproduction (i.e during meiosis)

- mutations, spontaneous changes that occur in genes and chromosomes.

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In basidiomycete fungi, where specifically do nuclei from parents combine to make offspring spores
algol13

In basidiomycete fungi, the nuclei from parents combine in the BASIDIA to make offspring spores. Basidia are microscopic structures but they are generally produced on large fructifications known as fruit bodies.

A basidium is a sporangium localized on the hymenophore of the fruiting bodies in basidiomycete fungi.

In basidia, the nuclei of two parental strains fuse by karyogamy and then divide to reproduce basidiospores.

A basidium generally contains four sexual spores known as basidiospores.

Learn more in:

brainly.com/question/3974563?referrer=searchResults

6 0
3 years ago
How was genetic engineering able to solve the problem of tomatoes being damaged in transit without sacrificing taste?
igor_vitrenko [27]

Answer:

The genetic engineering produced on these tomatoes was the solution to reduce the amount of chemical usage to crops as well as introducing a greater disease resistance, insect resistance, and increase shelf life. Conclusively, scientists and farmers still wanted to keep their natural color and flavor, yet change it into a more positive way. 70 years ago, spoke of the dangers of nightshade foods, covering all this ground, and stating that traditionally in South America, where potatoes and tomatoes come from they were eaten as medicine – that is given specifically for a short period time for a specific condition.

Hope this helped you!

Explanation:

7 0
3 years ago
A dichotomous key is used to separate organisms into _________.
DedPeter [7]
B. Subgroups
<span>When constructing a dichotomous key, the first step is to look at the group of objects or organisms and separate them into two groups based on a single distinguishing characteristic.  Then continue to separate each of the groups until each object has its own separate set of characteristics.</span>
5 0
3 years ago
What is the earths outer layer?
Arlecino [84]

Answer:

Earth's outer core is a fluid layer about 2,400 km thick

Explanation:

composed of mostly iron and nickel that lies above Earth's solid inner core and below its mantle. Its outer boundary lies 2,890 km beneath Earth's surface

7 0
3 years ago
Read 2 more answers
in humans, a combination of XX chromosomes results in a female zygote and that of XY result in a male zygotes. From whom does th
devlian [24]
The answer is: from mother

In a human diploid somatic cell (2n), there are<span> in total 46 chromosomes</span> - 22 autosomal chromosomes present in two copies and 1 pair of sex chromosomes. This means there are 23 pairs of chromosomes. In males, there is one X and one Y chromosome (XY) while in females, there are two XX chromosomes (XY).
During the formation of gametes, a female could give only X chromosomes, so gametes from the mother contain one X chromosome. But, a male could give X or Y chromosome, so gametes from the father contain either X or Y chromosome.
Female gamete and male gamete fuse to form a zygote. Male zygote must contain both X and Y chromosome. It inherits Y chromosome only from the father, so X chromosome must be inherited from the mother.
6 0
3 years ago
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