In angiosperms, pollen grains are (1 point)

1 answer:

7 0

<span>The answer is </span><span>C. haploid, and are made when haploid spores undergo mitosis. </span><span>

Pollen grains are male gametophytes in plants. In pollen sacs of an anther, spore mother cells, which is diploid, undergo meiosis and form four haploid spores. These haploid spores undergo mitosis and form haploid pollen grains.

Through the process of elimination:
- Pollen grains are haploid, so choices A. and C. are eliminated.
- In ovules, female gametes are produced, not male gametes, so, choice D. is also eliminated.</span>

You might be interested in

In which series are the stages of interphase in the correct order? A) G1 phase, G2 phase, S phase B) G2 phase, G1 phase, S phase

kumpel [21]

Answer:

D) G1, S phase, G2 phase

5 0

3 years ago

What are three processes that contribute to genetic variation during sexual reproduction

brilliants [131]

Crossing over – often, the sister homologous chromosomes of a cell exchange genetic material through recombination of genes.
Independent assortment/random fertilization – there are numerous variety of ways that the chromosomes of the gametes can combine, after meiosis, through fertilization to form a zygote
Mutation – on rare occasion, there is a slight and random change in the genes of a gametic cell caused by environmental factors.

7 0

3 years ago

Researchers suggests that we can avoid self-confirming diagnoses by a. looking for illusory correlations. b. carefully monitorin

Tpy6a [65]

Researchers suggests that we can avoid self-confirming diagnoses by all the given options.

<h3><u>Explanation:</u></h3>

Self confirming of diagnosis of a disease is actually good for a skilled person, but for general persons, it can be very dangerous and can cause severe outcomes. Different diseases have similar symptoms, but the outcomes are very different.

Some insignificant diseases like indigestion, acidity do have symptoms of loose motion, along with severe diseases like cholera, typhoid, dysentery, and acute arsenic poisoning. So its very necessary for checking the actual cause of the disease by differential tests as well as carefully classifying the symptoms by a professional doctor.

4 0

3 years ago

In what way are elements in the same column of the periodic table the same

Mnenie [13.5K]

1) they have similar chemical properties.
for example fluorine from the 17th column is a non metal so does all the elements of that group.
2)they have same valence electrons in their outermost shell
example
electronic configuration of
hydrogen 1, lithium 2,1, sodium 2,8,1 and so on.
3) have same valency.

5 0

4 years ago

Cellular respiration releases energy by breaking down

Leni [432]

Answer: glucose molecules.

Explanation: cellular respiration is a process by which glucose molecules are broken down in the presence of oxygen into carbon dioxide and water with the concomitant release of energy in form of ATP. The equation for cellular respiration is C6H12O6 + 6O2 --> 6CO2 + 6H2O + Energy.

Cellular respiration is divided into four stages:

1). The breakdown of glucose into two molecules of pyruvate.

2). The conversion of pyruvate to Acetyl CoA.

3). The oxidation of acetyl CoA in the Krebs cycle to produce ATP, FADH2 and NADPH and;

4). The oxidation of FADH2 and NADPH in the electron transport chain to generate more ATP.

8 0

4 years ago