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scZoUnD [109]
3 years ago
13

True or false? The absence of a trait cannot be used as a synapomorphy in phylogenetic analysis, only shared derived traits that

are present in the clade can be used.

Biology
1 answer:
Cerrena [4.2K]3 years ago
3 0

Answer:

This statement is False.

Explanation:

A shared apo-morphy which differentiate a clade from other organisms is called synapomorphy. In simple words, members of monophyletic group shares an apomorphy which indicate the presence or absence of certain organs from clade.

For example, loss of legs in snakes is an important  synapomorphy.

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Label the anatomical features of the bacterium to the right
otez555 [7]
Bacterial Flagellum
Mesosome
Ribosomes
Chromosomal DNA
Plasma membrane
Cell Wall
Plasmid DNA
Fimbriae
7 0
3 years ago
Read 2 more answers
The process that replicates the DNA, and then divides a Prokaryotic cell into two Daughter cells is called _______.
dlinn [17]

Answer:

Binary fission

Explanation:

The cell division process of prokaryotes, called binary fission, is a less complicated and much quicker process than cell division in eukaryotes. Because of the speed of bacterial cell division, populations of bacteria can grow very rapidly.

4 0
3 years ago
If you treated embryos with a Notch inhibitor how would this affect the specification of venous and arterial endothelial cells?
Alisiya [41]

Answer:

d. all endothelial cells would be venous

Explanation:

The Notch signaling pathway is a cell signaling system which consist basically of 4 NOTCH genes ( NOTCH1, NOTCH2, NOTCH3, and NOTCH4) each of them having the information to build a particular cell membrane receptor protein.

It has been demonstrated in zebrafish embryos that Notch signaling are highly determinant factors during vascular development, and a key function of these genes was specifically to regulate the differentiation of arterial fate in endothelial cells.

Notch signaling-deficient embryos showed a loss of expression of arterial markers such as ephrinB2 from arterial vessels with an accompanying expansion of venous markers into normally arterial domains. In contrast, embryos in which Notch signaling had been ectopically activated, meaning an activation out of "proper" place (where not expected, e.g. venous endothelial), exhibited the contrary phenotype, this is a suppression of vein-specific markers with ectopic expression of arterial markers in venous vessels.

To summarize, when Notch is supressed (in this case inhibited with a specific Notch inhibitor) arterial fate of endothelium is not followed, and venous fate is stablished. Thus, endothelial cells (those expected to form venous tissues but also arterial ones) would specified as venous.  

4 0
3 years ago
A confederation ( or confederacy) is a weak association of states, rather than a firm union
likoan [24]

The confederation has succeeded in establishing a new country. However, the residents of each state still tended to think of themselves as citizens of their particular state rather than as Americans. Under the Articles, many of the states continued to have only limited contact with each other. This made it difficult for them to agree on the common interests and goals for the government.

5 0
4 years ago
Of these, which is NOT a sexually transmitted disease?
kykrilka [37]

Answer:

D) Tuberculosis

Explanation:

A) Herpes is a sexually transmitted disease

B) Syphilis is a sexually transmitted disease

C) Chlamydia is a sexually transmitted disease

D) Tuberculosis cannot be transmitted sexually. Tuberculosis is transmitted through air. Therefore D) is the correct answer.

5 0
3 years ago
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