Let's say that the genotype of the couples are:
Cc and Cc. Notice that one is capital and the other is not. This is what shows that they are heterozygous. We put this now in a Punnet Square:
C c
C CC Cc
c Cc cc
This means that there is a 75% chance that their children will have a cleft-chin and 25% will not.
The probability is the same with each off-spring. So the answer would be 75% chance the same probability for all subsequent children.
Answer:
1- Option A) describes an index fossil. Trilobite existed for a short time, but was abundant and lived in many locations.
2- Option B) Continents were once joined and have since drifted apart.
Explanation:
1) Fossils are animal and vegetable rests found in different strata of sedimentary rocks. Sedimentary layers deposit chronologically, so they are used to reflect history. They keep in each layer some of the forms of life that inhabited that area in the past. These fossils turn to be very useful while dating ages. The term Index fossils refer to those fossils that only existed in a given era or geological period during evolution.
Index fossils must:
• Be easily recognizable and distinguishable from all the other fossils
• Have lived in a relatively short geological period
• Present a wide geographic distribution
• Have lived in different sedimentary basins
• Appear in different types of rocks
• Be abundant
<em>A) Trilobite existed for a short time, but was abundant and lived in many locations. </em>The species accomplish the requirements. It is easily recognizable, had a wide geographic distribution, was abundant, and lived for a short time.
2) The tectonic plates theory states that there is a continual movement of the crust. It explains the movement of the different plates and their directions and interactions. The continental drift theory explains how these movements have been taking place since millions of years ago. When continents were together in a unique continent, many species used to inhabit it. When plates started to separate, they took some of these species that got apart by the ocean. Some species were already dead and fossilized, while some other organisms died during continental drift and got fossilized after the divergence. <em>The existence of the same fossils, placed in the same layers and of the same age, suggests that they used to inhabit the same area and died during the same time, meaning that continents were together when they got fossilized. </em>
The answer is going to be the letter D, nitrogen. I hope this helps!!
Note: Question is Incomplete i have added full question in picture format. And marked correct answers.
Answer:
This question is about antibiotics resistance development in bacteria over time. Resistance develop only when we overuse these antibiotics. Resistance development in bacteria lead to their exponential growth resulting in more infections.
Also See attachment for full question and answer.
The true statements are:
A. Because the population grew more rapidly after time point C, the bacteria must have acquired a second drug- resistance mutation.
C. Bacteria that acquired a mutation that conferred drug- resistance had a growth advantage over non-resistant bacteria.
D. Between time points C and D, drug-resistant bacteria were reproducing faster than non- drug resistant bacteria were dying.
Answer:
Cell differentiation is how generic embryonic cells become specialized cells. This occurs through a process called gene expression. Gene expression is the specific combination of genes that are turned on or off (expressed or repressed), and this is what dictates how a cell functions.
Explanation:
