Which of the following statements about hominin evolution is correct?
As hominins have evolved- a. sexual dimorphism was significantly reduced
Hominins are described as any species of early humans which are more closely related to humans than chimpanzees, including modern humans themselves. An example of hominin species is - Australopithecus afarensis
<h3>☣ Question -:</h3>
Which of these equation is the correct one for fermentation?
❍ Glucose + oxygen → carbon dioxide + water
❍ Glucose → lactic acid
❍ Glucose → ethanol + carbon dioxide
<h3>☣ Explanation -:</h3>
To understand this first we should know what is fermentation.
<u>What </u><u>is </u><u>fermentation</u><u>?</u>
A process of chemical change in food or drink because of the action of yeast which may cause it to produce bubbles or heat, or turn sugars in it into alcohol.
<u>Equation -:</u>
Which means
Glucose → ethanol + carbon dioxide
- Hence opition c is the correct answer.
A) the offspring are genetically identical to the parent.
The reason for this is that there are no different traits being passed down that could alter the offspring's appearance. If there is sexual reproduction, then the offspring shares both of the parent's traits. If there is only one parent, then there is less diversity. <span />
Answer:
The correct option is d) head.
Explanation:
Bicoid protein works as a transcription factor. It enters the nuclei of the embryos in early segmentation, where it activates the hunchback gene. In Drosophila, embryonic development begins at the time of fertilization. The sperm enters the mature oocyte through the micropile, a structure located in what will be the anterior region of the egg. Bicoid and hunchback mRNAs, protein products are critical for the formation of the head and thorax. Already in the early stages of oocyte development, certain mRNAs are located in specific regions of the oocyte: mRNA molecules encoding the Bicoid protein are preferentially located in the anterior region of the oocyte. Moderate levels of the bicoid protein are necessary to activate the formation of the thorax (i.e., the expression of the hunchback gene) but the formation of the head requires high concentrations of Bicoid, the promoters of a specific gap gene of the head must have sites of low affinity binding for Bicoid, so that this gene can be activated only in extremely high concentrations of Bicoid.
The lack of Bicoid protein affects the formation of the head and other structures in the anterior region of the oocyte.
Chromosome number varies from one organism to another. or example, humans have 46 chromosomes while bacteria have only one chromosome.
The problem associated with the chromosome number of various organisms faced by evolutionists is that with the decrease in the size of an organism, the number of chromosomes also decrease. Thus, it becomes difficult to find and study the chromosomes.
