A simple _____ telescope uses two convex lenses to gather and focus light.

1 answer:

4 0

A simple refracting telescope uses two convex lenses to gather and focus light from a distant object.

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Which is caused when there is a permanent change to the sequence of a gene?

guapka [62]

Mutation is the correct answer.

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4 years ago

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Use the balanced equation of a nitrogen cycle pathway below to support the conservation of matter and energy.

nadezda [96]

<h3>Answer and explanation;</h3>

According to the Law of conservation of mass; Mass cannot be created or destroyed in a chemical reaction. The law of conservation of mass states that the total mass of substances taking part in a chemical reaction is conserved during the reaction. For example in the equation;
N2 + 8 H --> 2 NH3 + H2
The number of hydrogen atoms and nitrogen atoms in the reactant side is equal to those on the product side.
Additionally; the law of conservation of energy states that the total energy of an isolated system remains constant, that is it can not be created or destroyed, rather, it can only be transformed or transferred from one form to another.

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3 years ago

what is one defining feature of a prokaryotic cell? cytoplasm surrounds organelles organelles are not membrane-bound membrane-bo

labwork [276]

Prokaryotic cells also have loose/free/a ring of DNA (not confined to a nucleus) and they can also sometimes have a capsule (slimy outer layer). Also they have slightly smaller ribosomes- 70s instead of 80s.

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3 years ago

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How does cell division differ between animal and plan cells?

romanna [79]

The process of cell division, in animal cells, a cleavage furrow forms between the two forming cell bodies after DNA and organelles have been replicated and situated in their new cell bodies. In plant cells, in place of a cleavage furrow, a cell wall begins to form down the center of the cell, separating the polar bodies. Once the cell wall is finished forming, the cell has fully separated into two, even though it shares a cell wall.

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3 years ago

Punnett squares are convenient ways to represent the types and frequencies of gametes and progeny in experimental crosses.

Illusion [34]

Answer:

F2 progeny: 1/4 YY: 1/2 Yy : 1/4 yy

Gamete frequency (for both male and female gametes)= 1/2 Y : 1/2 y

Explanation:

Given that the genotype of the both parents is "Yy", each of the parent would produce two types of gametes. The 1/2 of both the male and female gametes would have "Y" allele while the rest 1/2 would have "y" allele.

This is due to the fact that each gamete carries only one allele for any gene due to segregation of homologous chromosomes to the opposite poles during anaphase I of the meiotic division that forms gametes.

The random fusion of these male and female gametes would given the F2 progeny with genotype frequency= 1/4 YY : 1/2 Yy : 1/4 yy.

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4 years ago