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Nikolay [14]
3 years ago
7

When cells are going through rapid cell divisions during the first stage of animal development called "cleavage", which of the f

ollowing phases of the cell cycle are lost? (Choose ALL correct answers) Group of answer choices
Biology
1 answer:
alexira [117]3 years ago
4 0

Early cleavage divisions in most embryos are also rapid. One reason for this is that cleaving cells have a modified cell cycle, in which the two gap phases, G1 and G2 are completely omitted, and the cells cycle rapidly between M and S phases. In addition, because the major cytoskeletal systems of the cells are largely devoted to mitosis (microtubules) and cytokinesis (microfilaments) during rapid cleavage division, there is typically an antagonism between periods of rapid cell division and cell movement. Thus as the embryo approaches gastrulation, there is a tremendous slowing in the rate of division (note the slope of the curve at the right).

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Draw the hydrogen bond(s) between the following two sets of bases. The letter \"R\" represents the rest of the nucleotide. The b
Snowcat [4.5K]

Answer:

The DNA (deoxyribonucleic acid) is a double stranded molecule function as a genetic material in many organisms. It is comparatively stable molecule than RNA because of hydrogen bonds found in it and also due to lack of an oxygen atom. It's basic unit is nucleotide which comprises of a nitrogenous base, ribose sugar and a phosphate group. There are four type of nitrogenous bases found in DNA known as Purines (guanine +adenine) and pyrimidines (cytosine + thymines). As the name indicates the purines are double ringed while pyrimidines are single ringed.

This question is based on the concepts of watson and crick model of DNA. According to which base form bonds with their complementary bases like adenine form double hydrogen bond with thymine and cytosine form triple hydrogen bond with thymine.

Hydrogen bonding is function of hydrogen in which it form bond with atoms of higher electronegativity (ability to attract the bonding pair) like oxygen.

Download pdf
6 0
3 years ago
PLEASE HELP IM ON FINAL ATTEMPT!!!
allsm [11]
Hope this helps :)


https://www.immunology.org/public-information/bitesized-immunology/cells/cd8-t-cells
5 0
3 years ago
Read 2 more answers
Ccording to Sir Isaac Newton, gravity depends on two factors. What are they?
KiRa [710]

Answer:

Mass and distance.

Explanation:

Gravity is considered to be a universal force of attraction which acts between all objects that has both mass, energy and occupy space. Therefore, it acts in such a way as to bring objects together.

Additionally, the gravity of earth makes it possible for all physical objects to possess weight.

Newton's law of universal gravitation states that the force of attraction (gravity) acting between the Earth and all physical objects is directly proportional to the Earth's mass, directly proportional to the physical object's mass and inversely proportional to the square of the distance separating the Earth's center and that physical object.

According to Sir Isaac Newton, gravity depends on two factors and these are mass and distance.

4 0
3 years ago
humans grow to a certain height and then do not grow any taller. do plants grow in the same way? how do plants get taller? expla
Kitty [74]
Plants get taller because they are stretching in search of sunlight. Sunlight is essential for photosynthesis; which energy, light, sunlight, water, carbon dioxide come together to produce sugar for the plants to survive. 
4 0
2 years ago
Earth is 150 million kilometers from the sun, and the solar "wind" travels at about 400 km/sec. How long does it take particles
FrozenT [24]

Answer:

The correct answer is - 4.34 days.

Explanation:

Given:

Distance from the sun to earth = 150 million kilometer

= 1500,00,000 km

The solar "wind" travels = 400 km/sec

= 400*60*60 km/ hour

= 1440000 km/hour

Then time = distance/speed

time = 1500,00,000 km/1440000 km/hour

time = 104.166666667 hours

time = 104.166666667/24

=  4.34 days.

4 0
3 years ago
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