5. A student adds a suspension of baker's yeast cells into bread dough. After this mixture is left in a large bowl undisturbed for several hours, the student returns to find that the bread dough has doubled in size. Which gas molecule is responsible for this increase in dough size?

Answers

Answer 1
Answer:

Answer:

The gas molecules responsible for the increase in dough size are carbon dioxide.

Explanation:

Yeast feed of sugars by braking them into carbon dioxide, alcohol, other molecules, and energy. This process is known as fermentation. When fermentation occurs, carbon dioxide expands, helping the bread dough to increase. Yeast is also important to produce alcohol and gluten, both important to bake bread.

Answer 2
Answer: accumulation of carbon dioxide is responsible for the increase in dough size

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In plants that have alternation of generations the haploid spores are made by theA. cotyledon.
B. seed coat.
C. sporophyte.
D. gametophyte.

Answers

Answer: C. Sporophyte

A sporophyte is a diploid body having two sets of chromosomes. It produces spores through the process of meiosis. These spores are the product of asexual mode of reproduction in plants and the sporophytic phase is the asexual phase in the alteration of generations in plants. The sexual phase is the gametophytic phase. The spores produced are haploid that means they exhibit a single set of chromosomes.  

it is made from the sporophyte

Which of the following animals possess a central nervous system? jellyfish lobsters fish starfish

Answers

Fish definitely have a central nervous system!
It contains their brain, spinal cord and Medulla Oblongata (which is a connecting the brain with the spinal cord!)
Their brains even have the same parts as the human brain! For example, they also have a cerebellums
its fish hope it helps

From the food web below, which organism is the primary consumer? The picture shows a food web. It consists of phytoplankton (producer), zooplankton (primary consumer), small fish and crustaceans (secondary consumer), large fish (tertiary consumer), and marine mammals and people (quaternary consumers).

Answers

Final answer:

The primary consumer in the food web is the zooplankton.

Explanation:

In the given food web, the primary consumer is the zooplankton. The primary consumers are organisms that consume producers, which in this case are the phytoplankton. Zooplankton are small organisms that eat the phytoplankton, making them the first level of the food chain.

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What's a question that could be answered by observing chromosomes of different species of animals

Answers

Answer:

we can ask questions related to karyotype, such as: how many chromosomes a certain species have? known as chromosome count, how large are the chromosomes of one species compared to another? what are the taxonomic relationships between some species?

Explanation:

when we observe chromosomes, we´re describing the karyotype, which varies among different species, the study of the karyotype is known as karyology, and thought some techniques such as stainings, can provide information such as number of chromosomes, positioning of centromeres, differences in size or distribution of heterochromatic region, taxonomic relationships, among other. in humans, there are 46 chromosomes, and we can see for example the sex chromosomes, and determine the sex and other physical characteristics

1. what clue  to the presence of certain genetic disorders can be seen in  karyotype?                                                                                                               2. why might a lab worker attempting to diagnose a genetic disorder prefer to work with photographs of  chromosomes rather than the chromosome themselves?                                                                                                             3.why would it be much difficult to construct a karyotype of unstained chromosomes?                                                                                                    

Why might introduction of exotic species disrupt an ecosystem?

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Exotic species might endanger the natural ecosystem of the place where they would be introduced by changing the food chain, or over multiplying, or anything similar.

What do pairs of homologous chromosomes have in common?

Answers

Same genes

The homologous chromosomes have the same genes in common. Each cell has at least two sets of chromosomes which one comes from one’s father also called as paternal chromosome and mother, called as the maternal chromosomes. These chromosomes are what makes the child obtain the characters and may depend on the traits the parents possess. Homologous chromosomes are not duplicated chromosomes or identical however, they are analogous or similar. The alleles for a specific characteristics isn’t the same but the same genes are in the same order.



Final answer:

Pairs of homologous chromosomes, or homologs, share similar features, carry the same genes in the same order, differ in their parent origin and engage in genetic information exchange during meiosis.

Explanation:

Pairs of homologous chromosomes, called homologs, share several key features. Firstly, they are typically the same length and shape, and they carry the same genes in the same order, although the versions of these genes (called alleles) might vary. Secondly, each pair is derived from separate parents; one comes from the mother (maternal chromosome) and one from the father (paternal chromosome). During cell division, particularly during the phase of meiosis, these homologous pairs align with each other, allowing equivalent genetic information to be exchanged, a process known as crossing over.

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