1. In plants, sexual reproduction occurs when sperm and egg unite to form a...
a. gamete
b. gametophyte
c. sporophyte
d. zygote
Is it d?
2. A plant continues to grow throughout its life through the use of s a process called...
a. alternation of generations
b. photosynthesis
c. dormancy
d. germination
Is it b?
3. Which is one advantage of sexual reproduction?
a. More offspring are produced.
b. More offspring survive to maturity
c. The offspring have more genetic variation.
d. The offspring and the parents are identical.
Is it c?
4. Which is one advantage of external fertilization?
a. The offspring are genetically identical to the parents.
b. More eggs can be fertilized at one time.
c. More sperm can be released at one time.
d. More protection is available for developing zygotes.
Could it be either b or c?
1. The correct answer is d. When sperm and egg unite in plants, they form a zygote.
2. The correct answer is a. A plant continues to grow throughout its life through the process called alternation of generations, where it alternates between the gametophyte and sporophyte stages.
3. The correct answer is c. One advantage of sexual reproduction is that it results in offspring with more genetic variation.
4. The correct answer is d. One advantage of external fertilization is that more protection is available for developing zygotes.
For question 1: In plants, sexual reproduction occurs when sperm and egg unite to form a... The correct answer is d. zygote. The zygote is formed when the sperm cell fertilizes the egg cell, which then develops into a new individual plant.
To arrive at this answer, you can break down the answer choices and determine which one fits the description.
a. Gametes are the sperm and egg cells themselves, so they are not the result of their union.
b. Gametophyte refers to the haploid generation in the alternation of generations life cycle, not the zygote.
c. Sporophyte refers to the diploid generation in the alternation of generations life cycle, not the zygote.
d. Zygote is the result of the union of sperm and egg cells, and it develops into a new individual plant.
For question 2: A plant continues to grow throughout its life through the use of a process called... The correct answer is b. photosynthesis. Photosynthesis is the process by which plants convert sunlight, water, and carbon dioxide into energy, allowing them to produce new tissues and continue growth.
To arrive at this answer, you can analyze the answer choices:
a. Alternation of generations refers to the life cycle of plants involving alternating haploid and diploid generations. It is not the process of growth.
b. Photosynthesis is the process by which plants use sunlight to produce energy, allowing for growth.
c. Dormancy refers to a period of inactivity or slowed growth in plants, not the process of growth.
d. Germination is the process by which a plant sprouts from a seed, but it does not account for the continued growth throughout the plant's life.
For question 3: Which is one advantage of sexual reproduction? The correct answer is c. The offspring have more genetic variation. Sexual reproduction introduces genetic variation through the mixing of genetic material from two parents, resulting in offspring with unique genetic combinations.
To determine the answer, you can analyze the answer choices:
a. While sexual reproduction can produce more offspring, this is not a specific advantage of sexual reproduction.
b. The statement is not true for sexual reproduction as the survival of offspring depends on multiple factors.
c. Sexual reproduction indeed leads to offspring with more genetic variation, enhancing the species' adaptability and survival chances.
d. The offspring and parents being identical is not a characteristic of sexual reproduction but rather a characteristic of asexual reproduction.
For question 4: Which is one advantage of external fertilization? The correct answer could be either b or c, depending on context.
Let's break down the answer choices:
a. The statement is not true for external fertilization, as it does not yield genetically identical offspring.
b. External fertilization often involves the release of a large number of eggs, increasing the chances of successful fertilization compared to internal fertilization, where fewer eggs are typically involved.
c. External fertilization also involves the release of a large number of sperm, often in direct contact with the eggs, increasing the chances of successful fertilization compared to internal fertilization.
d. More protection for developing zygotes is typically associated with internal fertilization, where the embryos are enclosed within the parent's body, rather than external fertilization.
In conclusion, the correct answer for question 4 could be either b or c depending on the context and the specific advantages being considered.
1. yes
2. no
3. yes
4. Even with internal fertilization, millions of sperm are released. Does that help?