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Neko [114]
3 years ago
13

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

Biology
2 answers:
love history [14]3 years ago
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. 
<span>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 </span><span>produce sperm cells.</span>
Mazyrski [523]3 years ago
3 0
Pollen grains undergo meiosis to form egg cells.
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GalinKa [24]
The 1st, 2nd, and 3rd are true.
6 0
2 years ago
Eye color in most mammals is dependent on the number of inherited pigment genes (melanin) that are additive in their effects. If
Dominik [7]

Answer:

Hazel - 1/4 or 25%

Green - 1/2 or 50%

Blue - 1/4 or 25%

Explanation:

First, let us carry out the cross between AaBB and Aabb using a Punnet's square. The result is as below:

AABb - 4/16

AaBb - 8/16

aaBb - 4/16

(See the Punnet's square analysis in the attached image).

<em>AABb genotype has 3 pigments, hence, would be hazel.</em>

<em>AaBb genotype has 2 pigments, hence, would be green.</em>

<em>aaBb has one pigment, hence, would be blue.</em>

Expected progeny:

<em>Hazel - 1/4 or 25%</em>

<em>Green - 1/2 or 50%</em>

<em>Blue - 1/4 or 25%</em>

6 0
3 years ago
Cameron is collecting data to determine the time of completion for each stage of germination in seeds. He is using bean seeds fo
mariarad [96]

Answer:

it is c: Taking observations at precise intervals

Explanation: I just took the test.

8 0
3 years ago
Which term refers to the thick folds of tissue found on each of the cerebral hemispheres?.
Leno4ka [110]

Answer: A gyrus (plural = gyri) is the ridge of one of those wrinkles, and a sulcus (plural = sulci) is the groove between two gyri. The pattern of these folds of tissue indicates specific regions of the cerebral cortex. The head is limited by the size of the birth canal, and the brain must fit inside the cranial cavity of the skull.

Explanation: Hope this helps :)

3 0
2 years ago
How do hydrochloric acid and bile salts help digest food?
yan [13]
HCL is guilty for triggering the release of enzymes such as pepsin which are essential for the digestion of protein. Bile contains bile acids, which are critical for digestion and absorption of fats and fat-soluble vitamins in the small intestine.
4 0
3 years ago
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