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4 years ago

Does a cheetah run faster than an ostrich?

Biology

1 answer:

jek_recluse [69]4 years ago

4 0

Yes the cheetah can run a max speed of up to 70 miles per-hour while an ostrich can only run a max speed of up to 45

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Describe the role of chiasmata in chromosome segregation during meiosis.

Aleksandr [31]

Explanation:

The phase of Prophase I of meiosis is very long and divided into 5 subphases: Leptotene, Zygote, Pachytene, Diplotene, and Diakinesis. During a phase of the Diplotene, the degree of condensation is high, which allows individualizing the sister- chromatids that remain attached by the cohesins. The synaptonemal complex disintegrates, and from the centromeres begins a repulsion between homologous chromosomes, which remain associated only with the places where they occur as permutations.

These sites are called chiasmas (Greek, crossed) because they show the crossover of homologous chromatids. Chiasmas represent the cytological finding of the occurrence of permutation. The presence of at least one bivalent chiasm is essential to ensure the correct segregation of the homologous chromosomes in anaphase I.

6 0

3 years ago

Fond correct answer please

OLga [1]

Answer: The answer would be Precipitation.

Explanation:

4 0

3 years ago

Read 2 more answers

[PLEASE ANSWER, WILL GIVE BRAINLIEST IF RIGHT] Write the complementary base pairs for the following DNA sequence: ATTCGAATCGGGGT

HACTEHA [7]

Answer:

TAAGCTTAGCCCCATGAT

Explanation:

A - T

T - A

C - G

G - C

4 0

4 years ago

What chromosomes have genes for the same traits in the same order on both chromosomes

Zigmanuir [339]

Diploid is the answer

7 0

3 years ago

The cladogram shown below describes the evolutionary relationship among several species, labeled A to F. The five dots represent

max2010maxim [7]

(You will find the cladogram in the attaches files)

Answer:

C. The genomes of species C and D are nearly identical because neither species has a derived character.

Explanation:

A Cladogram is a tree-type graph based on cladistic analysis. It represents the common ancestral relationships among the involved groups.

The tree-type graph is a ramified diagram that represents the relationship between the involved taxa.
The cladistic analysis follows the maximum parsimony criterium. Explains the character state from the point of view of the fewest changes through history. Explains evolution with the minimal amount of evolutive changes. It recognizes the monophyletic groups as natural groups. These groups are the clades, and their classification -sequencing- represents their phylogeny.

The sequencing term refers to lists of groups according to their relation. One group is the brother-group of the following one.

So the cladogram represents the relationship between groups according to a derived character.

The derivated character is any trait that a group passes to the descendants. Through evolution, the characters change, and new changes are added. When referring to a derivate character, we mean that all the subsequent species in the cladogram carry the trait.

A cladogram provides an image of how new species keep characters that were inherited from older species.

So, in the exposed example, the five dots represent derived characters, representing traits 1 to 5. Branches A to F, represent groups. (See the cladogram in the attached files). Group A inherited trait 1, group B probably still carries trait 1, but also trait 2. Groups C and D equally inherited trait 3. Group E inherited character 4, and finally, group F inherited character 5.

Groups C and D inherited trait 3 and probably also still have traits 1 and 2. So they are very similar to each other. At a certain point, they diverged, probably due to a new mutation that was not passed to the rest of the group.

C. The genomes of species C and D are nearly identical because neither species has a derived character. Correct.

6 0

3 years ago