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alekssr [168]
2 years ago
8

Humans have 23 pairs of chromosome in every body cell. Even one extra chromosome causes death or serious disorders. For example,

an extra copy of chromosome 21 causes Down syndrome. Which of the following are affected in a human being with an extra chromosome? Choose the 3 items that apply.
Biology
1 answer:
tamaranim1 [39]2 years ago
3 0

Explanation:

In the majority of cases, the extra copy of chromosome 21 comes from the mother in the egg.

In a small percentage (less than 5%) of cases, the extra copy of chromosome 21 comes from the father through the sperm.

In the remaining cases, the error occurs after fertilization, as the embryo grows.

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In the autumn, many birds will collect seeds and then hide them in various caches throughout their habitat. The birds will guard
snow_tiger [21]

Abiotic factor is defind as a nonliving condition such as climate, rain, wind, temperature, altitude, soil or habitat, which influences and affects an ecosystem and the organisms in it.

The abiotic factor that contributed to the evolution of this set of behaviors as mentioned in the question is cold winter season.

5 0
2 years ago
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Which of the following would you expect to contain cells with the same number of chromsomes as an egg cell in a plant? (Pick all
marissa [1.9K]

Answer:

The correct answer is option -  A. Gametophyte, C. spore, and D. sperm.

Explanation:

The egg cell of a plant is haploid in the cell which means it has only one set of chromosomes. The haploid cells arise from the meiosis cell division in parent sex cells. These parent cells are divided into four cells with half of the chromosome number in comparison to the parent cells.

The gametophyte, spore, and sperm all three are the product of the meiosis division and are haploid in number.

Thus, the correct answer is option - A, gametophyte, C. spore and D. sperm.

8 0
3 years ago
How do guard cells maintain homeostasis?
Mice21 [21]

Answer:

Explanation:  Guard cells in the plants prevent water loss from it in cases of soil dryness or high temperature by closing themselves. If this does not happen, water will keep leaving the plant by the process of transpiration in these harsh conditions and the plant will not have the important medium for the homeostasis process to continue.

4 0
2 years ago
Which process temporarily disrupts homeostasis because it increases an already high concentration of chemicals in the cell?
devlian [24]

When cells in a body are not working properly and normally, they cause disruption in the body homeostasis.

Homeostatis is characterized as balance in the body but when there is any disturbance in the body, it breaks down the balance and cause imbalance. For example in the case of diabetes in which body fails to maintain the good amount of glucose in blood which results in imbalance the body which is why diabetic patients are asked to maintain and monitor their body sugar level to maintain homeostatis.


5 0
2 years ago
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In this experiment, you are looking at the effect of various germicides on microbial growth. The organism that you are using for
raketka [301]

Answer:

Less susceptible.

Explanation:

This organism would be less susceptible to the various germicides than a prokaryotic organism, such as bacteria because the form and structure of eukaryotic organism is different from the prokaryotic organism so the germicides no or less affected the eukaryotic organism so we can say that the  the eukaryotic organism which is used in baking would be less susceptible to the various germicides than a prokaryotic organism.

8 0
2 years ago
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