Which organelle is labeled A?
A.nucleus
B.vacuole
C.ribosome
D.mitochondrion

Answers

Answer 1

Answer:

Correct answer: B) Vacuole

Vacuoles are the membrane bound structure found in the plant including algae and in some fungi that function to provide structural support and also serve as a site for storage, and waste disposal for the plant.

They do not have a fixed size or shape, plant cell can changed them according to their need.

It tend to be the largest organelle of the plant cell. It also function to maintain the internal pressure required withing the plant cell to provide structure and support to the growing part of the plant.

Answer 2

Answer: B. Vacuole is here depicted

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The Tasmanian devil species ( Sarcophilus harrisii) can only be found on the island of Tasmania. What has this geographical isolation caused in the species of the Tasmanian devil?A decrease in genetic variation A decrease in sleep habits An increase in adaption skills An increase in potential reproduction mates

What is the correct order for the following events in excision repair of DNA? (1) DNA polymerase I adds correct bases by 5¢ to 3¢ replication. (2) Damaged bases are recognized. (3) DNA ligase seals the new strand to existing DNA. (4) Part of a single strand is excised.

Answers

Answer:

2, 4 , 1 and 3

Explanation:

The correct order for events in excision repair of DNA are:-

2, 4 , 1 and 3 that is the

1st step would be:

(2) Damaged bases are recognized.

2nd step of the process

(4) Part of a single strand is excised.

3rd step will be

(1) DNA polymerase I adds correct bases by 5¢ to 3¢ replication.

and the final step in excision repair of DNA is

(3) DNA ligase seals the new strand to existing DNA

Answer:

2, 4 , 1 and 3

Explanation:

The correct order for events in excision repair of DNA are:-

2, 4 , 1 and 3 thatv is the

1st step would be:

(2) Damaged bases are recognized.

2nd step of the process

(4) Part of a single strand is excised.

3rd step will be

(1) DNA polymerase I adds correct bases by 5¢ to 3¢ replication.

and the final step in excision repair of DNA is

(3) DNA ligase seals the new strand to existing DNA

In the change from a five-kingdom classification system to a six-kingdom classification system, one kingdom was divided into two. What was used as a basis for that division?A. similar behaviors
B. genetic differences
C. similar appearances
D. eukaryotic differences

Answers

D. eukaryotic differences

Scientists have observed that pythons have vestigial leg bones. They have also observed that snakes in general have more DNA sequences in common with four-legged geckos than they do with legless eels. What do these two observations have in common

Answers

Answer:

Eels are just elongated fish. Their ancestors looked like tarpon fish. Their fins were a disadvantage in tight spaces, streamlined creatures literally filled a niche. They are more related to the salmon than the pythons.

There is fossil evidence to suggest that pythons and all the other snakes may have evolved from burrowing lizards, such as the varanids. Which are more related to the geckos than to fish.

Explanation:

The confusion can be made because eeil genus name-Anguilla, comes from anguis, which on Latin means serpent.

Final answer:

Pythons' vestigial leg structures and snakes' similar DNA sequences with geckos both point to a common ancestor and evolution over time. These observations support the theory of evolution, demonstrating that while some traits may be lost over time, like legs in snakes, others are retained.

Explanation:

Vestigial structures and DNA sequences are two types of evidence that evolutionists use to support the theory of evolution. In this case, pythons have been observed to have vestigial leg bones which implies that their ancestors might have had functional legs. On the other hand, the fact that snakes have more DNA sequences in common with four-legged geckos than with legless eels could also be interpreted as evidence of a common ancestor.

Snakes and geckos, despite their very different appearances, both belong to the clade Squamata, which also includes lizards. Their DNA sequences suggest that these creatures have shared ancestry, supporting the evolutionary theory. Similarly, the vestigial structures in pythons further back up this view. Vestigial structures are remnants from an organism's ancestry. The leg bones in pythons could well be residual parts left over from their legged ancestors, as snakes are believed to have descended from lizards.

In a nutshell, both these observations tell us the same story: that current species have evolved from common ancestors in the past. Over time, some traits (like legs in the case of snakes) might have become useless and got eliminated through natural selection, while others were retained. The end result is the rich biodiversity we see around us today.

Learn more about Evolution here:

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Referred to as a giant molecule

Answers

Giant covalent structures contain a lot of non-metal atoms, each joined to adjacent atoms by covalent bonds. The atoms are usually arranged into giant regular lattices - extremely strong structures because of the many bonds involved. The graphic shows the molecular structure of diamond and graphite: two allotropes of carbon, and of silica (silicon dioxide).

Answer:

TRUE

Explanation:

Identify the missing word. Jack has been very unreliable making loan payments in the past. He has been late on many payments, and completely missed several others. He can expect to now have a ___________.

Answers

The missing word/s would be "late fine" or "past due fee". Jack has been very unreliable making loan payments in the past. He has been late on many payments, and completely missed several others. He can expect to now have a late fine. In addition, he will also gain a low credit score and have difficulty in getting another loan.

Which kind of soil is likely to have the lowest porosity?A. Soil that is a mixture of sand and humus

B. Soil that is all sand

C. Soil that is all silt

D. Soil that is a mixture of silt and clay