Depending on the type of cell, there are two ways cells divide—mitosis and meiosis. Each of these methods of cell division has special characteristics. One of the key differences in mitosis is a single cell divides into two cells that are replicas of each other and have the same number of chromosomes. This type of cell division is good for basic growth, repair, and maintenance. In meiosis a cell divides into two cells that have half the number of chromosomes. Reducing the number of chromosomes by half is important for sexual reproduction and provides for genetic diversity.
The answer should be advantame
b. The light-dependent reactions are responsible for making sugars.
c. The light-independent reactions use ATP and NADPH.
d. The light-independent reactions use the sunlight to drive its processes.
the correct answer would be A
Earth is not at the center of the moon's orbit. Objects in space do not orbit in circles. The orbit in ellipses, or, ovals. Geometrically, an ellipse is formed by two focus points. Much like the sun is at one focus point of the Earth's orbit, the Earth is at one focus point of the moon's orbit.
(I do not own the image.)
In a phylogenetic tree, close relations are usually shown by nodes branching off from the same line. The most recent evolutionary split would be at the end of the tree. Appearance doesn't necessarily reflect genetic closeness due to environmental influences and the development of analogous structures.
Without the specific phylogenetic tree to refer to, I can only explain the basis for the potential correctness of the statements provided. Typically, when analyzing a phylogenetic tree, close relations are typically indicated by nodes that branch off from the same line in the tree. As for the 'most recent evolutionary split', it would be the one furthest to the 'right' or end of the tree, being most recent time-wise. The level of similarity between organisms does not necessarily reflect their distance on the phylogenetic tree. Environmental adaption could allow two distinct species to appear more similarly than they genetically are. This is the concept of analogous structures.
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Without the actual phylogenetic tree, it's challenging to provide a definitive answer to which statement is correct. The correct statement would be the one that represents the closest common ancestors between the species, as per the rules of phylogenetic analysis.
The question is about the analysis of a phylogenetic tree. Without the actual tree provided, it's challenging to provide a direct answer to which statement is correct. However, if we go by the rules of phylogenetic analysis, the correct statement would be the one that represents the nearest shared branches in the phylogenetic tree.
For instance, if the arctic fox and the fennec fox share a more recent common ancestor on the tree than the arctic fox and the kit fox, then the statement 'The arctic fox is more closely related to the fennec fox than to the kit fox' would be considered correct. The same logic applies to the other species mentioned in the other statements. Therefore, without the actual tree, we cannot definitively state which statement is correct.
Phylogenetics is a major part of evolutionary biology and it involves the study of the evolutionary relationship amongst various species. These relationships are discovered through phylogenetic inference methods that evaluate observed heritable traits, such as DNA sequences or morphology under a model of evolution.
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LEDs emit light because of energized solids; fluorescent bulbs emit light because UV light interacts with a phosphor coating.
LEDs emit light because of heat; fluorescent bulbs emit light because of energized solids.
LEDs emit light because UV light interacts with a phosphor coating; fluorescent bulbs emit light by concentrating wavelengths of light.
b. Dorsal hollow nerve cord
c. Spinal column
d. Notochord
8. In order for the exchange of oxygen and carbon dioxide to occur, an animal’s respiratory surfaces must remain
a. cold c. hot
b. dry d. moist
9. A bird’s instinct to fly south for the winter is an example of which type of behavior
a. Learned behavior
b. Habituation
c. Observant conditioning
d. Innate behavior
10. Echinoderms are most closely related to chordates because both are
a. Protostomes
b. Deuterostomes
c. Endotherms
d. Ectotherms
11. What advantage do forward facing eyes provide primates
a. The ability to form extended social groups
b. The ability to judge the distance of branches
c. The ability to manipulate tools
d. The ability to find mates easier
12. What type of symmetry does the animal in the figure display
a. Asymmetrical c. radial
b. Bilateral d. multi-symmetry
13. The ability for animals to reproduce on land was primarily due to
a. Lungs c. 4 limbs
b. Endothermy d. amniotic eggs
14. Cephalization allows animals to
a. Gain information about their environment
b. Escape from predators
c. Attract mates
d. Increases the production of offspring
15. Termites can often be found with protists in their gut. The protists aid in the digestion of cellulose, which is found in the wood termites eat. What type of relationship is this
a. Parasite c. mutualism
b. Commensalism d. cohabitation
16. Which is true about gas exchange in respiratory systems
a. Gases diffuse from areas of low concentration to areas of high concentration
b. Gases diffuse from areas of high concentration to areas of low concentration
c. Gases diffuse equally in most situations
d. Concentration has no effect on gas diffusion
17. When you use your knowledge and experience to figure out an error message on your computer, you are using
a. Classical conditioning c. innate behavior
b. Insight learning d. trial-and error learning
18. Which of the following types of cells produce a muscle contraction
a. Sensory neuron
b. Interneuron
c. Motor neuron
d. All neurons can stimulate muscle contraction
19. What is the function of the excretory system
a. To supply cells with oxygen and nutrients
b. To rid the body of metabolic wastes
c. The exchange oxygen and carbon dioxide with the environment
d. To break down food
20. Examining the teeth of an animal can give you information about whether it
a. Practices intracellular or extracellular digestion
b. Is a filter feeder or a detritivore
c. Is a nutritional symbiont
d. Is a herbivore or carnivore