Which if the following accurately describes the life cycle of most gymnosperms

2 answers:

6 0

I found the exercise on the internet and bellow are the options:
"A. Seed cones contain ovules.
B. Germinated seeds are haploid.
C. A pollen tube is used to prevent the fertilization process.
D. Pollen grains undergo meiosis to form egg cells."

The correct answer is D.
There are no seed cones, but pollen cones, where the ovules can be found. Germinated seeds are diploid, not haploid. The pollen tube role is to promote the fertilization process by leading the sperm to the egg, once the sperm in this type of plants do not have flagella and therefore no movement.
The correct answer is D because pollen grains are really the diploid germinative cells that produce sperm cells.

Mazyrski [523]2 years ago

3 0

Pollen grains undergo meiosis to form egg cells.

You might be interested in

Which of the following example(s) does NOT cause bias in a research study.

Andreyy89

(A) The internal body temperature can be taken from any area of the body without a difference in the type of temperature, resulting in NO bias. Of course this is completely reliant on the type of illness, but out of all options this is correct.

Illnesses affect the throat/mouth and ear.
checking the thermometer underneath a tongue will result in the same temperature as the ear, in an ill individual.

8 0

3 years ago

Africa and South America are 4,000 km apart. If the plates move away from each other at a rate of 30 km per 1 million years, how

yulyashka [42]

Answer:

The majority of the research shows that the plates move at the average rate of between approximately 0.60 cm/yr to 10 cm/yr. Some sources state that in the North Atlantic, the rate of movement is only about 1 cm (about 0.4 in) per year, while in the Pacific it amounts to more than 4 cm (almost 2 in) annually, while others say that plates, in general, travel from 5 to 10 cm/yr.

The Eurasian Plate is moving away from the North American Plate at a rate the is about 3cm per year. That is about the same rate at which your fingernails will grow.

The distance from New York to London is in 3459 miles (5567 km). What will the distance be in 5 million years?.

The distance from New York to London in 5 million years will be 3552 miles (5717 km). So if today it takes us 7 hours and 30 minutes to fly to London at a speed of 460 miles per hour, in 5 million years at the same rate of speed will take us close to 8 hours.

7 0

3 years ago

Read 2 more answers

A nurse is measuring the blood pressure of toddlers during a community health camp. what blood pressure finding is the nurse mos

aniked [119]

The nurse could find an 86-106 systolic and 42-63 diastolic pressure in toddlers. Though taking a toddler's blood pressure is infinitely harder compared to adults, their blood pressure is often influenced by many factors because they are growing up. Generally, boys' blood pressure will be higher than the girls'. Those taller kids will have a more normal blood pressure than the shorter ones. Age and sex affect the blood pressure of toddlers.

3 0

3 years ago

Read 2 more answers

Question 7 (1 point)

raketka [301]

If the Moon were to double in mass, the gravitation force between it and the Earth would become twice.

6 0

3 years ago

How might marine scientists combat eutrophication?

Kay [80]

Eutrophication is the overgrowth of algae in lakes and ponds

that is usually caused by the introduction of different chemicals

into the water from fertilizer run-off. Some ways to combat this

are to increase the flow of moving water, prevent contamination

from fertilizer, and reduce pollution of our lakes and streams.

5 0

2 years ago