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nasty-shy [4]
3 years ago
14

A phylogenetic tree:

Biology
1 answer:
Alenkasestr [34]3 years ago
8 0

Answer:

B. diagrams the evolutionary history of a particular group of organisms.

Explanation:

Phylogenetic trees represent hypotheses about the evolutionary relationships between a group of organisms.

A phylogenetic tree with the morphological (body shape), biochemical, behavioral or molecular characteristics of species or other groups can be constructed.

When building a tree, we organize the species into nested groups based on shared derived characters (characteristics different from those of the group's ancestor).

Gene or protein sequences can be compared between species and used to build phylogenetic trees. Nearby species usually have few differences in their sequences, while less related ones tend to have more.

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During which stage of the life cycle is a star a ball of gas and dust?
sergij07 [2.7K]

Answer: the sixth stage in a low mass stars life, the remains of the red giant is a glowing ball of gas about the size of earth. Nuclear fusion has stopped and the gas begins to cool.

Explanation:

4 0
4 years ago
Read 2 more answers
Match the words below to the appropriate blanks in the following sentences.
Masteriza [31]

Answer:

1. Malonyl CoA

2. Inhibits

3.fatty acil CoA

4. Carboxylase

5. Insulin

6. Synthesis

7. Glucagon

8. Oxidation

Explanation:

the oxidation of the mitochondria is blocked by the entry of fatty acid units, a reaction produced by stopping the carnitine acetyl transferase mediated by Malonyl CoA

A key intermediate in fatty acid synthesis ——-Malonyl CoA—-inhibits —-carnitine acyltransferase I, thereby blocking the entry of fatty acyl units into the mitochondrion for oxidation.

The substrates for fatty acid oxidation, ——Fatty acyl CoAs ——-, inhibit fatty acid synthesis by interfering with the polymerization of acetyl-CoA ——carboxylase ——.

Hormonal effects on adipocytes are opposed:——- Insulin ——-promotes fatty acid ———-synthesis ——-by several mechanisms;——Glucagon ——promotes fat breakdown and fatty acid ——Oxidation ——

8 0
4 years ago
Which environmental factor could lead to a decrease in genetic variation in a population of tuna?
jeyben [28]

Answer:

The environmental factor that could lead to a decrease in genetic variation in a tuna population is an increase in pollution (second option).

Explanation:

There is a correlation between genetic variability and environmental pollution, the latter being a factor that impacts negatively on the variability of a specific population.

The concept of pollution stress not only implies a low rate of reproduction, but it is also a factor that prevents genetic exchange with other populations, which is a factor that makes the genetic variability decrease in a population.

For these reasons an increase in pollution implies a decrease in genetic variability in a tuna population.

  • <em>Other options, such as </em><u><em>an increase in food availability</em></u><em>, a</em><u><em> decrease in tuna fishing </em></u><em> or </em><u><em>a decrease in tuna predators</em></u><em>, are environmental factors that contribute to increased genetic variability.</em>

3 0
3 years ago
Read 2 more answers
When you breathe, the pressure inside the lungs is different than the pressure outside the lungs. this is an example of a(n)?
goblinko [34]

The pressure inside your lungs and the pressure outside them fluctuate as you breathe. An illustration of a pressure gradient is this.

<h3>What is an example of pressure gradient?</h3>
  • The pressure gradient is the amount by which the atmospheric pressure drops in a location at a particular time.
  • A pressure gradient is demonstrated by gale-force winds in one city changing to a moderate breeze after an hour. the rate of the pressure in space decreasing (gradient) at a specific period.
<h3>How does pulmonary ventilation change with pressure gradient?</h3>

Thoracic ventilation Because air moves down a pressure gradient, or from an area of greater pressure to an area of lower pressure, the difference in pressures is what drives pulmonary ventilation.

When breathing in and out, the respiratory airways restrict the flow of air. The air must be transported by the pressure gradient from the mount (or nose) to the pulmonary alveoli.

learn more about pressure gradient here

brainly.com/question/2530102

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5 0
2 years ago
Light and sound waves both carry energy. When light strikes an object, the colors seen are reflections of the visible light spec
Klio2033 [76]

A.

Sound absorption depends more on the thickness of a material than its color.

4 0
4 years ago
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