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m_a_m_a [10]
3 years ago
15

Metalloids have full valence shells of electrons

Biology
1 answer:
madreJ [45]3 years ago
8 0
That is true.........

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Help !!
Yuliya22 [10]

Answer:

Compare autotrophs to heterotrophs, and describe the relationship between these two groups of organisms. Autotrophs make their own energy, while a heterotroph must eat another organism to be able to get energy. ... Once the energy flows from the system it gets recycle for future use in other organisms.

7 0
2 years ago
Regular aerobic exercise gives an individual more endurance is a sentence that shows cause and effect. Which word indicates the
Elenna [48]
<span>b. Exercise



If we conduct a research investigation in these given situation. More specifically, an experiment this would suggest a most probable scenario of a cause and effect situation or technically called causality. 

Here the Independent variable is the exercise 
The dependent variable is the endurance.

Hence regular EXERCISE increases endurance. </span>
8 0
3 years ago
Read 2 more answers
During meiosis homologous chromosomes often twist around each other break exchange segments and rejoin this process usually cont
Annette [7]

Explanation:

Crossing over, or genetic recombination contributes to genetic variation and diversity.

In early Prophase I of meiosis, crossing over occurs. This is the exchange of segments of chromosome, between non-sister homologous or similar chromatids crossing over happens at chiasmata, the point where non-sister chromosomes are joined. The chromosome pairs form tetrads held together at chiasmata.

Further Explanation:

All the genetic information within the eukaryotic cell is stored within the nucleus as helical DNA. This DNA is tightly wound around histones as chromosomes. To produce daughter cells, the chromosomes (total number of chromosomes (2n)) are copied before the cell splits into two daughter cells. This process is known as mitosis, and occurs in cell division and growth processes. Two new nuclei are formed, along with identical cells. These are the same as the parent cell and the chromosome number (2n) is maintained. Conversely in meiosis, the number of chromosomes (2n) is halved through meiotic divisions, producing 4 (n) germ cells (sperm or eggs), each containing half the number of chromosomes as its parent cell.

During the process of prophase I one the nuclear envelope containing chromosomes has only partly broken down homologous chromosomes are joined together by proteins and a complex or pairing call synapsis- corresponding genes on chromatids are aligned precisely. The syanpsis allows for crossing over which is the exchange of segments of chromosome, between non-sister homologous or similar chromatids crossing over happens at chiasmata, the point where non-sister chromosomes are joined.

Crossing over contributes to genetic variation and diversity; novel gene combinations in gametes are formed, which are not present in parent chromosomes. Genetic diversity describes all the genetic characteristics or traits within a species.

Learn more about mitosis at brainly.com/question/4303192

#LearnWithBrainly

6 0
3 years ago
Which of the following species type, if removed would alter the ecosystem drastically?
blagie [28]
Native species ??………..
6 0
2 years ago
In a food chain, which trophic level contains the greatest amount of energy? A. herbivores B. carnivores C. producers D. decompo
Alex787 [66]
Producers because they make their own food such as plants..
7 0
3 years ago
Read 2 more answers
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