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garik1379 [7]
3 years ago
14

What is the main force of evolution?

Biology
1 answer:
Yanka [14]3 years ago
3 0

Answer:

We have to evolve or we will just slowly die off.

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Three-year-old children typically have relatively large heads, while 6-year-old children have relatively longer, thin bodies. Th
Oksanka [162]

Answer:

Cephalocaudal

Explanation:

The cephalocaudal principle is known as the general process of physical and motoric development which take place from infancy into toddlerhood and at times at early childhood of which development obeys a head-to-toe progression.

Cephalocaudal is a word that connotes head to toe. Therefore, the cephalocaudal principle is stated as the overall process of development observed in the first set of years in postnatal development majorly with the period from infancy into toddlerhood.

The cephalocaudal principle has to do with both physical and functional development. On the basis of the earliest (i.e., physical development), physical growth in size, weight, and feature differentiation obey this process or form of development. The signs of this is well observed in a contrast of the physical characteristics of an infant In contrast to a toddler. In consideration of the latter, the head is mostly disproportionately big in contrast to the other parts of the body. By the time the preschool years is over for most children, it is well noticed that most must have done away with this top heavy appearance just as seen in our question.

3 0
3 years ago
Drosophila may be trisomic for chromosome IV and remain fertile. The gene determining the shape of bristles is in chromosome IV.
aev [14]

Answer:

I am going to give you the material so that you can be your doubt but I will not solve it because that is the basis of your learning that you react to what you are reading

In Mendel's "Experiment 1", pea plants with smooth seeds intersect with pea plants with rough seeds. (smooth seeds is the dominant feature). Mendel collected the seeds of this cross, the plants and obtained the F1-generation of plants, let them self-pollinate to form a second generation, and analyzed the seeds of the F2 generation. The results they obtained; And the ones you would predict in this experiment are:

Guide

F1-generation plants

Mendel crossed SS (smooth seeds) with ss (rough seeds.)

All the gametes of parents smooth seeds, have the allele S (dominant) and all the gametes of parents rough seeds have the allele s (recessive). All the plants of the F1 generation will affect the Ss genotype (heterozygous), and all the seeds smooth seeds.

Generation-F2 plants

Mendel let the F1-generation plants self-pollinate to form a second generation and analyzed the seeds of the resulting F2 generation.

F2 generation    

All F1 hybrid plants have the Ss genotype and all are smooth (dominant characteristic). Recessive alleles are secreted during gamete formation. As a result, one in four possible combinations in F2 generation plants will have the recessive homozygous genotype (ss).

4 0
3 years ago
1. Suppose all of the seed tests were done at the same time in the same type of soil and weather
lukranit [14]

Answer:

High quality of seeds.

Explanation:

92% of the seeds in a seed  package will sprout if it has high quality because good quality seeds has the ability to germinate more than those seeds which are not of good quality. If the seed has high quality, it has more than 90% germination rate. If the seeds are infected by some disease or damaged due to mechanical means so these factors also affected the rate of germination.

8 0
3 years ago
Based on the phylogenetic tree below, which groups of plants evolved most recently?
xeze [42]

Answer: The correct answer is- gymnosperms and angiosperms.

Phylogenetic tree is a diagrammatic representation that depicts the evolutionary relationship among different group of species. In other words, it is used to interpret the relatedness among different species and how they have descended from a common ancestor.

The tips in the phylogenetic tree represents the taxon ( or particular group of species) that are descended.

In the given tree, gymnosperms and angiosperms have evolved most recently because they correspond to the most recent branches having the immediate common ancestor at the topmost level as compared to the immediate common ancestor of other taxon.

Thus, gymnosperms and angiosperms is the right answer.

3 0
3 years ago
What are prokaryotic cells (single celled organisms)?​
Iteru [2.4K]

Answer:

yes

Explanation:

prokarotic cells are single celled and can procreate on their own

3 0
3 years ago
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