All categories

3 years ago

Which statements about the phylogenetic tree are true? select all that apply?

Biology

1 answer:

andre [41]3 years ago

4 0

Answer: The question is not complete, here is the completed part gotten from other website.

Mammals and turtles are more closely related than are lungfishes and sharks. Hagfishes, lungfishes, and frogs have lobed fins.

Lancelets and coelacanths are more closely related than are chimaeras and coelacanths.

Organism (a) is a common ancestor of all chordates.

Descendants of organism (d) have limbs with digits. birds and ray-finned fishes have a notochord and jaws.

rays and frogs have vertebrae. organism (c) is a common ancestor of lampreys and lungfishes?

The correct options are;

Mammals and turtles are more closely related than are lungfishes and sharks.

Descendants of organism (d) have legs.

Rays and frogs have a vertebral column.

-Birds and ray-finned fishes have a notochord and jaws

Explanation:

This is because phylogenetic tree is a branching diagram that entails different evolutionary relationships that occur between organisms or biological species having common decent or ancestors and showing similar and differences in their genetic characteristics or traits. It shows how species evolved from their ancestors.

You might be interested in

Camel humps are an adaptation for _______.. a.. storing water. b.. regulating body heat. c.. carrying riders. d.. all of the abo

Fofino [41]

The correct answer is:

b regulating body heat.

Explanation:

Camels have humps on their backs as rooms to store fat. It is this fact that they live off when food and liquid are scarce. A well-fed camel in good shape has a firm, upright hump. After a long, exhausting wilderness journey the corresponding camel will have a hump that does floppy and bent over to one side.e. Concentrating body fat in their humps reduces heat-trapping.

6 0

3 years ago

Read 2 more answers

What are the two different results of a lack of calcium and a lack of atp?

liq [111]

<span>There are numerous proteins in muscle. The main two are thin actin filaments and thick myosin filaments. Thin filaments form a scaffold that thick filaments crawl up. There are many regulatory proteins such as troponin I, troponin C, and tropomyosin. There are also proteins that stabilize the cells and anchor the filaments to other cellular structures. A prime example of this is dystrophin. This protein is thought to stabilize the cell membrane during contraction and prevent it from breaking. Those who lack completely lack dystrophin have a disorder known as Duchene muscular dystrophy. This disease is characterized by muscle wasting begininng in at a young age and usually results in death by the mid 20s. The sarcomere is the repeating unit of skeletal muscle.

Muscle cells contract by interactions of myosin heads on thick filament with actin monomers on thin filament. The myosin heads bind tightly to actin monomers until ATP binds to the myosin. This causes the release of the myosin head, which subsequently swings foward and associates with an actin monomer further up the thin filament. Hydrolysis and of ATP and the release of ADP and a phosphate allows the mysosin head to pull the thick filament up the thin filament. There are roughly 500 myosin heads on each thick filament and when they repeatedly move up the thin filament, the muscle contracts. There are many regulatory proteins of this contraction. For example, troponin I, troponin C, and tropomyosin form a regulatory switch that blocks myosin heads from binding to actin monomers until a nerve impulse stimulates an influx of calcium. This causes the switch to allow the myosin to bind to the actin and allows the muscle to contract. </span><span>
</span>

6 0

3 years ago

1. Can a single organism change its traits to become better suited for its environment during its lifetime? (highlight one) YES

Burka [1]

Answer:

check explanation

Explanation:

If you are talking about adapting to an environment then yes, like how we train to strengthen our muscles to get stronger. If you mean by evolving then no, a single organism can not evolve their traits in a lifetime, like a human can't naturally grow gills to breathe underwater

6 0

2 years ago

Read 2 more answers

Which of the following best describes the role of water in photosynthesis?

Cloud [144]

Answer: During the process of photosynthesis, six molecules of carbon dioxide and six molecules of water react in the presence of sunlight to form one glucose molecule and six molecules of oxygen. The role of water is to release oxygen (O) from the water molecule into the atmosphere in the form of oxygen gas (O2).

Explanation:

4 0

3 years ago

7 ways that invasive species affect the environment

seropon [69]

Invasive species reduce biodiversity levels, create a nuisance, cause economic loss, and disrupt ecosystem equilibrium.

<h3>Effects of invasive species</h3>

Invasive species tend to drive away or kill native species.
Invasive species reduce the overall biodiversity of plants or animals in the ecosystem.
They cause economic loss through the loss of important native species.
They create nuisance in the environment and may be costly to get rid of.
They affect ecosystem equilibrium by causing species change.
They are usually difficult to manage.

More on invasive species can be found here: brainly.com/question/21452505

#SPJ1

6 0

2 years ago