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3 years ago

The fossil of a plant reveals that it produced spores that were used for reproduction. Which type of plant was it

Biology

1 answer:

natali 33 [55]3 years ago

7 0

Answer;

Seedless plant.

The fossil of a plant reveals that it produced spores that were used for reproduction. It was a seedless plant.

Explanation;

-Seedless vascular plants are plants such as fern and horsetails, liverworts, mosses; which contain vascular tissues, but do not produce flowers or seed.

-These plants reproduce using haploid , unicellular spores instead of seeds.

-These plants have life cycles with two distinct stages; one in which spores are produced and one in which sex cells are produced.

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Which brain structure receives information from all the senses except smell?

likoan [24]

The brain structure that receives information from all the senses except smell is the thalamus. This is located above the brain stem of the brain in which is a small structure that is responsible for having to receive or pass sensory signals to the brain’s cerebral cortex.

5 0

3 years ago

Calculate the diffusive force (J) experienced by potassium in a cell where the concentration gradient is 35 mM, the membrane wid

kodGreya [7K]

Answer:

Diffusive force J = 9590

Explanation:

From the given information:

Concentration gradient C₁ - C₂ = 35 mM = 35 × 10⁻³ M

membrane width Δ x = 1 cm = 10⁻² m

Solubility S = 1

diffusive area A = 10

Temperature T = 1° C = (273 + 1 )K = 274 K

Using the expression:

$\text {diffusive force J} = \dfrac{C_1-C_2}{\Delta x }\times T \times S \times A$

$J = \dfrac{35 \times 10^{-3}}{10^{-2} }\times 274 \times 1 \times 10$

$J = 3.5 \times 274 \times 1 \times 10$

Diffusive force J = 9590

8 0

3 years ago

The level of oxygen in the air is measured in a garden and on a city road. Which location has a higher level of oxygen and why?

motikmotik

A garden has a higher level of oxygen compared to a city road. A garden has plants and trees. Plants produce oxygen and sugars from carbon dioxide. A city road is composed of industrial buildings, vehicles, humans, and animals. They consume oxygen that is why the oxygen content is lesser on a city road.

7 0

3 years ago

Match each eukaryotic organelle to its function.

alexandr1967 [171]

Answer:

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(transelate)

6 0

3 years ago

A Complete the following statements A2 1. Red blood cells (RBC ) are also called Cryihrolyie A2 Bount disc. 2 The shape of a red

Andreyy89

Answer:

The answers are given in bold. The numbering was not clear, so please refer to my revision.

Explanation:

1- Erythrocytes are red blood cells

2-Biconcave is the shape

3- Transport and exchange of gases is the function of RBC

4- Hemoglobin is the oxygen-carrying substance......

5- A mature red blood cell lacks Nuclei

6- White blood cells are also called Leukocytes

7- White blood cells with granular cytoplasm are called Granulocytes

8- White blood cells without granular cytoplasm are called Agranulocytes

9- PMN/ granular leukocyte another name for Polymorphonucléar leukocyte

10- Neutrophils are numerous white blood cells

11- White blood cells with coarse reddish cytoplasmic granules are called Eosinophils

12- Basophils are the least abundant of white blood cells

13- Monocytes are the largest white blood cells

14- Lymphocytes are the small agranulocytes.......

15- Platelets are small fragments that prevents blood loss during injury

8 0

3 years ago